JP3996111B2 - Laser visor for aviation helmet and projection device - Google Patents

Description

  The present invention relates to an aviation helmet visor. More specifically, the present invention relates to an aviation helmet visor having a laser shielding performance and a projection function.

2. Description of the Related Art Conventionally, a visor projection type HMD (Helmet Mounted Display) that projects and displays information related to aircraft operation on a visor mounted on a helmet is known. In such a visor projection type HMD, in order to protect the dielectric multilayer film from dirt and water vapor, a dielectric multilayer film is deposited on the back surface of the helmet visor (the surface facing the face), and this dielectric multilayer film allows laser A method of simultaneously performing light shielding and partial reflection at a wavelength of 543 nm is employed.

In such a conventional visor projection type HMD, the contrast (C) defined by the ratio between the partial reflectance at a wavelength of 543 nm and the luminous transmittance needs to satisfy the relationship represented by the following equation.

As is clear from the above formula, in the visor projection type HMD, the contrast (C) needs to be 1.2 or more. However, when the light shielding laser beam is a multi-wavelength laser beam ranging from the visible region to the near infrared region, partial reflection at a wavelength of 543 nm on the dielectric multilayer film formed on the surface (back surface) facing the face of the conventional laser visor. The rate drops. For this reason, in order to set the contrast (C) in the visor type HMD to 1.2 or more, the visible light transmittance (luminous transmittance) of the laser visor must be intentionally reduced. For this reason, the conventional visor projection type HMD has a problem that the luminous transmittance is low, that is, the amount of light transmitted through the visor is small and dark. In the visor, the luminous transmittance is increased and the contrast is high. It was not possible to satisfy at the same time due to its structure.

  As described above, in the conventional laser visor, it is necessary to deposit a conductor multilayer film on the inside of the visor, that is, the surface facing the face of the visor. In such a visor having a dielectric multilayer film disposed on the inside, high visibility is required. It was difficult to simultaneously improve the transmittance and the contrast (C) of the visor projection type HMD.

The present invention provides a visor for an aviation helmet that is mounted on an aviation helmet and becomes a laser projection type HMD (Helmet Mounted Display), having a high contrast and a high luminosity transmittance of the visor. It is aimed.

  Another object of the present invention is to provide a aviation helmet visor having excellent contrast and anti-fogging properties, high contrast, and high luminous transmittance.

The present invention is a visor attached to the front of an aviation helmet, the visor being formed on a colored polycarbonate plate containing a light-absorbing dye and a face that does not face the face of the visor made of the colored polycarbonate plate. A dielectric multilayer film, and a partial reflection film for the projection light with a wavelength of 543 nm formed on the face facing the face, and the surface of the dielectric multilayer film and the partial reflection film for the projection light with a wavelength of 543 nm is surface active An oxide composite film containing an agent is formed.

  This aviation helmet visor has a dielectric multilayer film and a partial reflection film for projection light having a wavelength of 543 nm on the surface of a colored polycarbonate plate, and the surface of these films is an oxide composite film formed by an aqueous solution method. The oxide composite film further contains a surfactant.

  In the aviation helmet visor of the present invention, a dielectric multilayer film is formed by vapor deposition on the surface (convex portion) that does not face the face of the colored polycarbonate plate, and the wavelength (concave portion) that faces the face of the colored polycarbonate plate. A partial reflection film for 543 nm projection light is formed, and an oxide composite film is formed on the surface of the dielectric multilayer film and a partial reflection film for projection light with a wavelength of 543 nm. An anionic surface active activity is formed on the oxide composite film. In addition to imparting antifogging properties to the visor of the present invention by containing an agent, the dielectric multilayer film formed on the surface (convex portion) that does not face the face of the colored polycarbonate plate, and the colored polycarbonate plate It is possible to protect the partial reflection film against the projection light having a wavelength of 543 nm formed on the face (concave part) facing the face. In particular, since the oxide composite film is formed and protected outside the dielectric multilayer film, the dielectric multilayer film can be formed on a surface (convex portion) that does not face the face of the colored polycarbonate plate.

  Thus, even if the dielectric multilayer film is formed on the surface (convex surface) that does not face the face of the visor, the dielectric multilayer film is protected by forming the oxide composite film outside the dielectric multilayer film, Scratch resistance is improved to the extent that it can withstand normal use. In this way, the dielectric multilayer film is formed on the surface (convex surface) on the side not facing the face of the visor, and the partial reflection film for the projection light having a wavelength of 543 nm is formed on the surface (concave portion) on the side facing the face of the visor. can do.

  Furthermore, the aviation helmet visor of the present invention has excellent scratch resistance and antifogging properties.

  Next, the aviation helmet visor of the present invention will be described in detail.

  FIG. 1 is a view for explaining a aviation helmet visor according to the present invention and a method of forming a virtual image using the aviation helmet visor, and FIG. 2 is a cross-sectional view of the aviation helmet visor according to the present invention.

  In FIG. 1, reference numeral 10 is an aviation helmet visor. The aviation helmet visor 10 of the present invention has a light shielding performance against laser light from the visible light region to the near infrared region. Furthermore, CRT (Cathode Ray Tubes) 13 and 13 are attached to the aviation helmet, and image information on the CRT is faced to the face of the aviation helmet visor 10 of the present invention from the projection optical devices 12 and 12. By projecting onto the plane, a virtual image is formed outside the aviation helmet visor 10, and a person wearing this aviation helmet can visually recognize the image information.

A cross-sectional view of such an aviation helmet visor 10 is shown in FIG. The aviation helmet visor 10 includes a colored polycarbonate plate 14 curved to the face side, a dielectric multilayer film 15 formed on one surface of the colored polycarbonate plate 14 using the colored polycarbonate plate 14 as a substrate, and the other surface. The partial reflection film 16 for the projection light having a wavelength of 543 nm is formed.

  The colored polycarbonate plate 14 is mixed with a light-absorbing dye that absorbs visible light on the short wavelength side, and the light-absorbing dye is uniformly dispersed in the colored polycarbonate plate 14. Examples of the light-absorbing dye for absorbing visible light on the short wavelength side include azo oil-soluble dyes, phthalocyanine metal complex dyes, and metal complex-based absorbents. These can be used alone or in combination. In the aviation helmet visor of the present invention, the light absorbing pigment as described above usually depends on the thickness of the polycarbonate plate as a base material, but is usually 0.005 to 1 part by weight with respect to 100 parts by weight of the polycarbonate. Used in amounts within the range of Such a light absorbing dye is added when the polycarbonate is melt-kneaded and is uniformly dispersed in the polycarbonate. By uniformly dispersing such a light-absorbing dye, the polycarbonate plate is slightly colored. In particular, the visible transmittance of visible light having a wavelength of 380 to 780 nm, which is visible light, is usually about 3 to 60%. .

  A thermosetting silicone resin film 30 is usually formed on the surface (convex surface side) of the colored polycarbonate plate 14 opposite to the face side. A dielectric multilayer film 15 is formed. The thermosetting silicone resin film 30 can be formed by applying and curing an organic silanol having a structure in which oxygen and carbon are bonded to silicon. By forming the dielectric multilayer film 15 on the surface of the thermosetting silicone resin film 30, the adhesion to the colored polycarbonate plate 14 is improved. The thickness of the thermosetting silicone resin film 30 thus formed is usually in the range of 100 to 200 nm. In addition, since this thermosetting silicone resin film 30 is a very thin layer and is colorless, the light transmittance of the colored polycarbonate plate 14 is substantially increased by forming this thermosetting silicone resin film 30. Does not fluctuate.

  As described above, the dielectric multilayer film 15 is usually formed on the surface (convex surface) on the side 25 opposite to the face of the colored polycarbonate plate 14 via the thermosetting silicone resin film 30.

The dielectric multilayer film 15 is composed of a plurality of dielectric layers having different refractive indexes. FIG. 3 shows an example of the dielectric multilayer film 15 composed of a plurality of dielectric layers. In FIG. 3, number 18 is an air layer, number 20 is a first dielectric layer, number 21 is a second dielectric layer, and number 19 is a colored polycarbonate plate. The refractive index of the air layer 18 is n ₀ = 1, the refractive index of the first dielectric layer 20 is n ₁ , the refractive index of the second dielectric layer 21 is n ₂ , and the polycarbonate resin plate The refractive index is n _s = 1.59.

  The thicknesses of the first dielectric layer 20 and the second dielectric layer 21 are the thicknesses of the optical path length that is ¼ of the wavelength of the light to be reflected. The reflectance (R) for direct incidence at this time can be expressed by the following equation (A).

In the above formula (A), p is the number of repetitions of the combination of the first dielectric layer 20 and the second dielectric layer 21, and in the case of the dielectric multilayer film 15 configured as shown in FIG. 3, p = 1. It is. n ₁
Higher reflectivity (R) is obtained as> n ₂ and the difference is larger. Also, the higher the combination repetition number p, the higher the reflectance (R).

  Therefore, the formation material, the thickness of each layer, and the layer configuration of the dielectric multilayer film 15 in the present invention can be set so that the laser reflectance is higher under the above conditions. Such a dielectric multilayer film 15 can be formed of, for example, titanium oxide, silicon oxide, zirconium oxide, magnesium fluoride, cerium fluoride, and zinc sulfide. In addition, the thickness of the layer formed from the above components is usually set so as to have an optical path length of ¼ wavelength of the laser wavelength to be reflected. Further, the layer structure may be a two-layer structure as shown in FIG. 3, or a three-layer structure or more.

Specifically, when the dielectric multilayer film 15 is intended to reflect ruby laser light having a wavelength of 694 nm and Nd-YAG laser light having a wavelength of 1064 nm, the first dielectric layer 20 is formed of SiO ₂ , forming a dielectric layer 21 with TiO _2. The refractive index n ₁ of the first dielectric layer 20 thus formed is 1.46, and the refractive index n ₂ of the second dielectric layer 21 is 2.4.

The dielectric multilayer film 15 includes: (a) colored polycarbonate plate 14 / first dielectric layer 20 (formation component; MgF ₂ , refractive index = 1.38) / second dielectric layer 21 (formation component; ZrO ₂ , Refractive index = 2.1), (b) colored polycarbonate plate 14 / first dielectric layer 20 (formation component; CeF ₃ , refractive index = 1.63) / second dielectric layer 21 (formation component; ZnS, The laser reflection dielectric multilayer film 15 as described above can be formed by vapor-depositing the dielectric as described above on the surface of the colored polycarbonate plate 14. Can do. The dielectric multilayer film 15 thus formed has a repetition count p of several tens, and the total thickness is usually in the range of 2000 to 5000 nm.

On the opposite side of the colored polycarbonate plate 14 on which the dielectric multilayer film 15 is formed as described above, that is, on the surface 35 (concave side) facing the face, a partial reflection film 16 for projection light having a wavelength of 543 nm is formed. ing. As described above, the partial reflection film 16 for the projection light having the wavelength of 543 nm projects and reflects the image information on the CRT (Cathode Ray Tubes) 13 and 13 provided in the helmet using the projection optical devices 12 and 12. The virtual image is recognized on the outside of the visor 10, and the visible light having a wavelength in the vicinity of the wavelength 543nm projected from the projection optical devices 12 and 12 is partially reflected to form a virtual image and In order to grasp, it is desirable that the reflection of the visible light that reaches through the visor from the outside is as low as possible.

  The partial reflection film 16 with respect to the projection light having a wavelength of 543 nm also has a relationship of reflectance, refractive index, and number of repetitions of layers as shown in the above formula (A).

Therefore, the partial reflection film 16 for the projection light having a wavelength of 543 nm has a configuration in which a plurality of dielectric layers are laminated. The dielectric layer forming the partial reflection film 16 with respect to the projection light having such a wavelength of 543 nm can be formed of, for example, titanium oxide, silicon oxide, zirconium oxide, magnesium fluoride, or the like. When the partial reflection film 16 for the projection light having a wavelength of 543 nm is formed by laminating a plurality of dielectric layers, (a) the colored polycarbonate plate 14
/ First dielectric layer a (formation component: SiO ₂ , refractive index = 1.46) / second dielectric layer a (formation component: TiO ₂ , refractive index = 2.4), (b) colored polycarbonate plate 14 / First dielectric layer b (formation component: MgF ₂ , refractive index = 1.38) / second dielectric layer b (formation component: ZiO ₂ , refractive index = 2.1) it can.

For example, the partial reflection film 16 for the projection light having a wavelength of 543 nm having the above-described configuration partially reflects image information projected from the projection optical devices 12 and 12, and the projection of such a wavelength of 543 nm. The reflectance of the partial reflection film 16 with respect to light is usually in the range of 20 to 40%, and the image information projected from the projection optical devices 12 and 12 is partially reflected,
A virtual image can be formed outside the visor.

  The partial reflection film 16 for the projection light having a wavelength of 543 nm may be formed on the surface of the colored polycarbonate plate 14 via a thermosetting silicone resin film (not shown), like the dielectric multilayer film 15.

  The partial reflection film 16 for the projection light having such a wavelength of 543 nm has a number of repetitions p of several times, and is usually in the range of 300 to 500 nm.

  In this way, in the visor having the dielectric multilayer film 15 having a dielectric layer and the partial reflection film 16 with respect to the projection light having a wavelength of 543 nm, dependency on the incident angle occurs due to multiple interference. FIG. 4 is an explanatory diagram for explaining the principle of the incident angle dependency.

That is, as shown in FIG. 4, the condition in which light having an incident angle θ on the thin layer 22 is reflected on the air layer 23 by multiple interference can be expressed by the following equation (B). Reference numeral 14 is a colored polycarbonate plate.

2nt ・ cosθ = λ (B)
Here, n is the refractive index of the thin layer 22, t is the thickness of the thin layer 22, θ is the incident angle of light in the thin layer, λ
Is the wavelength of the light to be reflected. Differentiating both sides of the above formula (B) with n and t as constants, the following formula (B-1) can be obtained.

From the above formula (B-1), it can be seen that light having a shorter wavelength λ has higher angular dependence. Therefore,
When blocking a plurality of laser beams having different wavelengths, the short wavelength laser beam is absorbed by the absorbing dye contained in the colored polycarbonate plate, and the long wavelength laser beam is reflected / shielded by the dielectric multilayer film. Thus, the angle dependency of the visor of the present invention can be relaxed.

  For example, when simultaneously blocking an argon ion laser beam having a wavelength of 514 nm, an Nb-YAG double laser beam having a wavelength of 532 nm, a ruby laser beam having a wavelength of 694 nm, and an Nb-YAG laser beam having a wavelength of 1064 nm, an argon ion laser beam (514 nm) and Nb -YAG double laser light (532 nm) can be absorbed by the absorbing dye, and ruby laser light (694 nm) and Nb-YAG laser light (1064 nm) can be reflected by the dielectric multilayer film.

  The colored polycarbonate plate 14 as described above, the dielectric multilayer film 15 formed on the convex side 25 of the colored polycarbonate plate 14, and the portion for the projection light having a wavelength of 543 nm formed on the concave side 35 of the colored polycarbonate plate 14 The surface of the aviation helmet visor 10 according to the present invention having the reflective film 16 has low resistance to scratches, dirt and water vapor.

  The surface of the aviation helmet visor 10 of the present invention is covered with an oxide composite film 17 in order to impart scratch resistance to the surface of the visor and further to provide antifogging properties. A system surfactant is applied to 17, and the oxide composite film 17 holds the surfactant. The oxide composite film 17 can be formed by depositing an oxide composite on the visor surface by adding a boron compound to an aqueous solution in which a plurality of fluorometal complexes are dissolved.

Examples of fluorometal complex compounds (Group A) that can be used here include titanium ammonium fluoride ((NH ₄ ) ₂ TiF ₆ ), silicon ammonium fluoride ((NH ₄ ) ₂ SiF ₆ ), and Mention may be made of ammonium zirconium fluoride ((NH ₄ ) ₂ ZrF ₆ ). These can be used alone or in combination. Furthermore, in the present invention, a part of the metal in the above-described fluorometallurgy compound may be a metal such as Nb, Ta, Al, Sn, and Ga. Examples of such fluorometal complex compounds (group B) containing other metals include ammonium stannous fluoride ((NH ₄ ) ₂ SnF ₆ ), indium ammonium fluoride ((NH ₄ ) ₂ InF ₆ ), Tantalum ammonium fluoride ((NH ₄ ) ₂ TaF ₇ ), Niobium ammonium fluoride ((NH ₄ ) ₂ NbF ₇ ), Aluminum ammonium fluoride ((NH ₄ ) ₃ AlF ₆ ), and Gallium ammonium fluoride (( NH ₄ ) ₂ GaF ₆ ).

Generally, when a fluoro metal complex compound is dissolved in pure water, it is ionized and dissolved as shown by the following formula.
(NH ₄ ) ₂ MeF ₆ + H ₂ O → 2NH ₄ ⁺ + MeF ₆ ²⁺ + H ₂ O (Me; metal atom)
When a boron compound is added as a fluorine scavenger to the aqueous solution in which the fluorometal complex compound is ionized and dissolved as described above, fluorine bonded to the metal Me is captured by the boron compound according to the following formula, and the metal Me Forms oxides and precipitates.
MeF ₆ ²⁺ + 2H ₂ O → MeO ₂ ↓ + 6F- + 4H ^{+
_{BO 3 2- + 4F - + 6H}} + → BF 4 - + 3H 2 O
Then, in the aqueous solution in which the metal oxide is precipitated as described above, the dielectric multilayer film 15 is preferably formed on one surface (convex surface) through the thermosetting silicone resin film 30, and the other surface. By immersing the colored polycarbonate plate 15 on which the partial reflection film of 543 nm transmitted light is formed on the (concave surface), the oxide composite can be deposited and the oxide composite film 17 can be formed.

  As the fluorine scavenger used here, boron oxide, boric acid or borate can be used.

The fluoro metal complex compound as described above has a temperature of usually 25 to 60 ° C., preferably 30 to
In 1 liter of pure water adjusted to a range of 50 ° C., as a group A fluorometallic complex compound,
Amount of silicon ammonium fluoride ((NH ₄ ) ₂ SiF ₆ ) in an amount in the range of 0 to 100 mol%, preferably 0.1 to 99.9 mol%, titanium ammonium fluoride ((NH ₄ ) ₂ TiF ₆ ) In an amount in the range of 0 to 100 mol%, preferably 0.1 to 50.0 mol%, and further zirconium ammonium fluoride ((NH ₄ ) ₂ ZrF ₆ ) 0 to 100 mol%, preferably 0.1 to Add and dissolve in an amount in the range of 99.9 mol%. However, the concentration of the group A fluorometal compounds in this aqueous solution is generally 1 × 10 ⁻³ mol / liter to 1 mol / liter, preferably 0.5 × 10 ⁻² mol / liter to 0 in total. Adjusted within the range of 5 mol / liter. When a group B compound is used as the fluorometal complex compound, the amount of the group A compound is usually in the range of 0.1 to 99.9 mol%, preferably in the range of 5 to 90 mol%. Can be used in any amount.

Further, the boron compound used as the fluorine scavenger is usually used in an amount in the range of 5 to 50 mol, preferably 10 to 20 mol, with respect to 1 mol of the fluorometal complex compound dissolved in the aqueous solution. Is done. Specifically, boron compound (for example, boron oxide (B ₂ O ₃ ), boric acid (H ₃ BO ₃ ), etc.) is usually 0 in 1 liter of an aqueous solution in which the fluorometal complex compound is dissolved at the above concentration. 0.1 to 0.5 mol, preferably 0.1 to 0.3 mol.

  By adding the boron compound in this way, the precipitation of the complex oxide is started. So, the visor is immersed in this aqueous solution for a certain period of time, and maintained in this state for a certain period of time, thereby complex oxidation on the surface of the visor. A thin film of an object can be formed.

  At this time, the film forming property of the oxide composite film is improved by preliminarily irradiating ozone plasma or the like to the visor in which the dielectric multilayer film is formed to perform surface hydrophilization treatment.

  Such a visor is usually immersed in an aqueous solution for 2 to 24 hours, preferably 5 to 20 hours, and then removed from the aqueous solution and dried to form a composite oxide film on the surface of the visor.

  The thickness of the oxide composite film 17 thus formed is usually in the range of 1 to 500 nm, preferably 5 to 100 nm. After drying, a surfactant is applied to the surface of the visor, and the molecules of the surfactant enter the ultra-fine recesses formed in the formed oxide composite film 17 and are held by the oxide composite film 17. .

The surfactant that can be used here may be any of a cationic surfactant, an anionic surfactant, an amphoteric surfactant, and a nonionic surfactant. Specifically, an alkyl ether Examples thereof include sodium sulfate ester, polyoxyethylene alkyl ether, fatty acid alkanolamide, fatty acid methyl glucamide, sodium α-olefin sulfonate, sulfosuccinic acid, alkylamine oxide, and linear alkylbenzene sulfonic acid. These can be used alone or in combination. Such a surfactant is preferably used together with an auxiliary agent such as glycerin; polyalkylene glycol such as polyethylene glycol; alcohol such as ethyl alcohol. Thus, when a surfactant is used together with an auxiliary agent, the surfactant is usually preferably in an amount ratio of 20% by weight or more, preferably in an amount ratio of 30% by weight or more with respect to the auxiliary agent. Is 50
It is mixed in an amount ratio of more than wt%. Such a mixture is preferably contained in the oxide composite film 17 while maintaining the above ratio. After applying the surfactant in such a quantitative ratio, the surfactant is contained in the oxide composite film 17 by removing moisture. In addition, the surfactant may be a surfactant that is included in the polishing pad when the formed oxide composite film 17 is soft-polished to smooth the surface.

  The oxide composite film 17 formed in the visor of the present invention has fine recesses, and the surfactant as described above is mostly contained in the fine recesses formed in the oxide composite film 17. Is taken in. In particular, when surface soft polishing is performed with a polishing cloth or the like while a surfactant is applied, the surfactant penetrates into fine concave portions formed in the oxide composite film 17.

  The surfactant once infiltrated into the fine recesses in this way becomes difficult to be physically removed, and even when the oxide composite film 17 has hydrophilicity and new medium properties, it can be brought into contact with water. Does not leak excessively.

However, when the visor of the present invention comes into contact with water, a trace amount of surfactant is eluted, and the surface tension of water is lowered to the extent that water cannot exist as water droplets on the visor surface. For this reason, since the water which contacted the visor surface becomes a water film and spreads on the visor surface, the visor is hardly fogged. Further, since a water film is formed on the entire visor, even if this water evaporates, it is difficult for water-drop-like traces to be generated. Therefore, the dirt attached to the visor of the present invention can be easily removed by washing with water. it can.
In addition, dirt such as dirt adhering to the visor can be easily wiped off with a trace amount of surfactant by wiping.

  Further, the surfactant that has entered the fine recesses formed in the oxide composite film 17 formed on the surface of the visor of the present invention is difficult to be removed by physical wiping or the like, and the visor comes into contact with water. As a result, it remains on the visor surface for a long time. As long as such a surfactant remains, the visor of the present invention can maintain good antifogging properties. In addition, this surfactant can be obtained by supplying the surfactant as described above to the visor surface by, for example, spraying and / or wiping the visor surface with a wipe impregnated with the surfactant. Additional supply can be made to the fine recesses formed in the composite film 17. The surfactant newly supplied to the visor surface in this way can be filled in fine concave portions on the surface of the oxide composite film 17 by, for example, wiping with a wiping cloth.

  By forming the oxide composite film 17 as the outermost layer in this way, the scratch resistance is remarkably improved and very excellent antifogging properties are imparted over a long period of time. Further, by forming such an oxide composite film 17 as the outermost layer, the optical properties of the aviation helmet visor of the present invention, such as the reflectivity of the laser beam, the reflectivity with respect to the projection light having a wavelength of 543 nm, and the light transmittance, are also obtained. Characteristics do not fluctuate.

  The following examples of the present invention will be described to specifically describe the aviation helmet visor of the present invention, but the present invention is not limited thereto.

  Weigh 99.0 g of silicon ammonium fluoride, 4.17 g of titanium fluoride ammonium and 4.32 g of zirconium fluoride ammonium and dissolve them in pure water to make the total amount of the treatment solution 3 liters. The temperature was kept at 40 ° C.

90 g of boric acid (H ₃ BO ₃ ) was added to the aqueous solution thus prepared.

  After adding boric acid, it is confirmed that boric acid is completely dissolved, and then the dielectric multilayer film 15 and projection light with a wavelength of 543 nm are projected on the surface of the colored polycarbonate plate via the thermosetting silicone resin film 30. The visor on which the partial reflection film 16 was formed was immersed in an aqueous solution.

  The immersion was continued for 24 hours under the same conditions, the visor was taken out, washed with pure water (40 ° C.), and then dried.

  Next, a surfactant composed of a mixed solution of sulfosuccinic acid and alkylamine oxide was applied and wiped off with a cloth so as not to cause unevenness on the surface.

A 35cm cylinder is provided at the top of the humidifier, and the tip of this cylinder is used as a steam outlet (40-50 ° C). A visor with a surfactant applied is fixed to this steam outlet, providing anti-fogging durability. evaluated.

  Although steam was blown for 60 minutes or more, no haze was generated, which greatly hindered the visibility of the visor. Further, in the test in which the surfactant was applied and allowed to stand as it was, after 20 to 30 days, a state where no fogging occurred was maintained even when exhaled.

  Separately, the scratch resistance of the surface was examined. That is, using # 0000 steel wool, the surface of the visor was rubbed under a condition of a load of 500 g, a stroke of 20 mm, and 20 reciprocations (1 reciprocation 2.7 seconds), and the surface condition was evaluated in 5 ranks. An evaluation of 4 or more was obtained, and good scratch resistance was exhibited.

The visor used for forming the above oxide composite film is prepared by blending azo-based oil-soluble dye and phthalocyanine metal complex dye as polycarbonate with 0.1 to 1 part by weight in 100 parts by weight of polycarbonate. Then, a colored polycarbonate plate 14 having a thickness of 2 to 2.5 mm obtained by melt kneading is used as a substrate, and SiO ₂ and TiO ₂ are heated as a dielectric multilayer film 15 on the convex surface of the colored polycarbonate plate 14. Vapor deposition was performed through a curable silicone resin film (thickness: 100 to 200 nm), and SiO ₂ and TiO ₂ were vapor-deposited on the concave surface of the colored polycarbonate plate as a component for forming a partially reflective film of projection light having a wavelength of 543 nm. Is.

  In Example 1, the visor of the present invention was manufactured in the same manner except that the oxide composite film was formed as follows.

  Weigh 47.8 g of ammonium ammonium fluoride, 11.8 g of titanium ammonium fluoride and 64.8 g of ammonium zirconium fluoride and dissolve them in pure water to make the total amount of the treatment liquid 3 liters. The temperature was kept at 40 ° C.

90 g of boric acid (H ₃ BO ₃ ) was added to the aqueous solution thus prepared.

  After adding boric acid, it was confirmed that boric acid was completely dissolved, and then the dielectric multilayer film 15 and partial reflection with respect to projection light having a wavelength of 543 nm were passed through the thermosetting silicone resin film 30 on the colored polycarbonate plate. The visor on which the film 16 was formed was immersed in an aqueous solution.

  The immersion was continued for 24 hours under the same conditions, the visor was taken out, washed with pure water (40 ° C.), and then dried.

  Next, a surfactant composed of a mixed solution of sulfosuccinic acid and alkylamine oxide was applied and wiped off with a cloth so as not to cause unevenness on the surface.

A 35cm cylinder is provided at the top of the humidifier, and the tip of this cylinder is used as a steam outlet (40-50 ° C). A visor with a surfactant applied is fixed to this steam outlet, providing anti-fogging durability. evaluated.

  Although steam was blown for 60 minutes or more, no haze was generated, which greatly hindered the visibility of the visor. Further, in the test in which the surfactant was applied and allowed to stand as it was, after 20 to 30 days, a state where no fogging occurred was maintained even when exhaled.

  Separately, the scratch resistance of the surface was examined. That is, using # 0000 steel wool, the surface of the visor was rubbed under the conditions of a load of 500 g, a stroke of 20 mm, and 20 reciprocations (1 reciprocation 2.7 seconds), and the surface condition was evaluated in five levels. An evaluation of 4 or more was obtained, and good scratch resistance was exhibited.

  In Example 1, the visor of the present invention was manufactured in the same manner except that the oxide composite film was formed as follows.

  13.8 g of ammonium ammonium fluoride, 27.1 g of ammonium titanium fluoride, and 91.8 g of ammonium zirconium fluoride were weighed and dissolved in pure water to make the total amount of the treatment liquid 3 liters. The temperature was kept at 40 ° C.

90 g of boric acid (H ₃ BO ₃ ) was added to the aqueous solution thus prepared.

  After adding boric acid, it is confirmed that the boric acid is completely dissolved, and then a thermosetting silicone resin film 30 is formed on the polycarbonate resin substrate, and the dielectric multilayer film 15 and the partial reflection film 16 for the projection light having a wavelength of 543 nm are formed. The visor formed was immersed in an aqueous solution.

  The immersion was continued for 24 hours under the same conditions, the visor was taken out, washed with pure water (40 ° C.), and then dried.

  After drying, a surfactant composed of a mixed solution of sulfosuccinic acid and alkylamine oxide was applied and wiped off with a cloth so as not to cause unevenness on the surface.

A 35cm cylinder is provided at the top of the humidifier, and the tip of this cylinder is used as a steam outlet (40-50 ° C). A visor with a surfactant applied is fixed to this steam outlet, providing anti-fogging durability. evaluated.

Although steam was blown for 60 minutes or more, no haze was generated, which greatly hindered the visibility of the visor. Further, in the test in which the surfactant was applied and allowed to stand as it was, after 20 to 30 days, a state where no fogging occurred was maintained even when exhaled.

  Separately, the scratch resistance of the surface was examined. That is, using # 0000 steel wool, the surface of the visor was rubbed under a condition of a load of 500 g, a stroke of 20 mm, and 20 reciprocations (1 reciprocation 2.7 seconds), and the surface condition was evaluated in 5 ranks. An evaluation of 4 or more was obtained, and good scratch resistance was exhibited.

  An aviation helmet visor of the present invention is provided. This visor has excellent optical properties as well as excellent scratch resistance and antifogging properties. Further, the laser light from the laser device can be shielded by the dielectric multilayer film 15 and the colored polycarbonate plate.

FIG. 1 is a diagram for explaining a aviation helmet visor according to the present invention and a method of forming a virtual image using the visor. FIG. 2 is a cross-sectional view of the aviation helmet visor of the present invention. FIG. 3 is a diagram showing a cross section of a laser reflective dielectric multilayer film and a partial reflection film for projection light having a wavelength of 543 nm. FIG. 4 is an explanatory diagram for explaining the incidence angle dependency.

Explanation of symbols

10 ... aviation helmet visor 12 ... projection optics 13 ... CRT (Cathode Ray Tubes)
14, 19 ... Colored polycarbonate plate 15 ... Dielectric multilayer 16 ... Partial reflection film 17 with respect to projection light having a wavelength of 543 nm ... Oxide composite film 18 ... Air layer 20 ... First Dielectric layer 21 ... second dielectric layer 22 ... thin layer 23 ... air layer 25 ... side opposite to the face side (convex side)
30 ... Thermosetting silicone resin film 35 ... The side facing the face (concave side)

Claims (7)

A visor attached to the front of an aviation helmet, the visor comprising a colored polycarbonate plate containing a light-absorbing dye, and a dielectric multilayer formed on a surface of the visor made of the colored polycarbonate plate that does not face the face A film and a partial reflection film for the projection light with a wavelength of 543 nm formed on the face facing the face, and the surface of the dielectric multilayer film and the partial reflection film for the projection light with a wavelength of 543 nm contains a surfactant An aviation helmet visor characterized in that an oxide composite film is formed.   An oxide composite film is formed by precipitation of an oxide from an aqueous solution on the surface of the dielectric multilayer film and the partial reflection film with respect to the projection light having a wavelength of 543 nm, and the oxide composite film contains a surfactant. The visor for an aviation helmet according to claim 1, wherein the visor is for aviation helmets. 2. The light-absorbing dye partially absorbs laser light on a short wavelength side, and the dielectric multilayer film partially reflects laser light on a long wavelength side. The visor for an aviation helmet according to item 2 or 2.   2. The aviation helmet visor according to claim 1, wherein the colored polycarbonate plate has a visible light transmittance (luminous transmittance) in a range of 3 to 60%.   The aviation helmet visor according to claim 2, wherein the oxide composite film includes at least one metal oxide selected from the group consisting of titanium oxide, zirconium oxide and silicon oxide.   6. The aviation helmet visor according to claim 2, wherein an average thickness of the oxide composite film is in a range of 5 to 100 nm. The oxide composite film is obtained by adding a fluorine scavenger to an aqueous solution in which a corresponding metal fluorometal complex compound is dissolved, so that the metal oxide is converted into a dielectric multilayer film and a partially reflective film for 543 nm projection light. The aviation helmet visor according to claim 2 or 5, wherein the visor is formed by being deposited on the surface of the formed colored polycarbonate plate.

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