JPH0469763B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an eyeglass adjustment device that outputs data on an eyeglass lens to be fitted into an eyeglass frame, that is, an eyeglass lens after a beading process.

BACKGROUND OF THE INVENTION Factors that determine whether a spectacle lens is defective after a spectacle wearer inserts the spectacle lens into a frame include the weight of the spectacles and the thickness of the edge of the lenses, that is, the thickness of the edges. Because other elements of glasses,
For example, the lens power, frame shape, etc. can be thoroughly investigated and selected before fitting the eyeglass lenses into the frame, but the weight and rim thickness of the glasses can be determined by the beading process used to fit the eyeglass lenses into the frame. This is because it could not be known until later.Therefore, in the past, eyeglass fitters estimated the weight and edge thickness of the eyeglass lenses after the beading process based on their experience and showed this to the eyeglass wearer. However, this estimated value was inaccurate, and therefore, it was inevitable that the judgment of the glasses wearer's malfunction based on this estimated value would also be inaccurate.

In particular, recently, in addition to conventional inorganic glass, plastics, high refractive index glasses, and the like have come to be used as materials for eyeglass lenses. On the other hand, as eyeglass wearers' preferences have diversified, eyeglass frames have been manufactured in a variety of sizes, from large to small, and from circular to considerably deformed. Under these circumstances, it is becoming increasingly difficult for the eyeglass adjuster to estimate the weight and thickness of eyeglasses.

Structure of the Invention The present invention has been made in view of the above-mentioned conventional problems, and is based on optical data of spectacle lenses, material data of spectacle lenses, shape data of spectacle frames, and mutual position data between spectacle frames and spectacle lenses. It is an object of the present invention to provide an eyeglass adjustment device characterized by accurately calculating and outputting data on eyeglass lenses after beading.

FIG. 1 is an overall configuration diagram for clearly showing the configuration of the present invention. The input unit receives the optical data of the eyeglass lenses, the material data of the eyeglass lenses, the shape data of the eyeglass frames, and the mutual position data between the eyeglass frames and the eyeglass lenses, and the calculation unit uses the above inputs to calculate the size of the eyeglasses after the beading process. Lens data is calculated and output to the output section, and the output section outputs the eyeglass lens data after the beading process.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. As shown in FIG. 2, the eyeglass adjustment device includes a data input section 22 for inputting data regarding lenses.
0, a frame shape detection section 100 that detects the frame shape, a data processing section 240 that receives the outputs of the data input section 220 and the frame shape detection section 100, and calculates the lens weight and lens rib thickness by calculating these inputs; It also includes a data output section 280 which receives the output of the data processing section 240 and outputs the lens weight and lens thickness after the polishing process.

The data input unit 220 includes lens material data 222 indicating the specific gravity of the lens material, lens refractive power data 224 indicating the lens power, and lens optical axis position data 22 indicating the position of the lens optical axis with respect to the frame.
6 and a lens thickness position designation data input section 228 indicating which position of the frame the lens thickness is to be entered using a keyboard or the like having appropriate operation knobs.

The lens material data 222 is the specific gravity p of the lens material itself, which is entered using a numeric keypad, etc., and the refractive index of each material can be entered using three key buttons indicating each of general inorganic glass, plastic, and high refractive index glass. You may also enter

The lens refractive power data 244 is the first lens refractive power data 244.
They are the curvatures R ₁ and R ₂ of the surface, the second surface, and the center thickness d.
Here, the center thickness d is more important data when calculating the lens weight than when calculating the lens refractive power. Of course, each lens manufacturer has a table showing the relationship between lens refractive power and lens shape, so the data input unit 220 stores this table and inputs only the lens refractive power as the lens refractive power data 224. You may also enter The lens refractive power data 224 is
Alternatively, it may be configured by spherical power and cylindrical power, which are widely used to display the refractive power of eyeglass lenses, and the curvature R ₁ of one surface of the lens.

The lens optical axis position data 226 is configured by the vertical distance from the upper or lower end of the lens frame of the frame to the lens optical axis, and the horizontal distance from the left or right end of the lens frame of the frame to the lens optical axis. do. Instead of the above-mentioned lateral distance, (pupillary distance-nose width length)/Z may be used. Here, the nose width is the distance between the left and right lens frame portions of the frame, which is a value normally shown on the frame, and the interpupillary distance is usually called the φD value, which is the distance between the left and right pupils.

The lens edge thickness position data 228 is constituted by coordinates indicated by a joy stick or the like on the curved surface of the CRT on which a glasses image, which will be described later, is formed.

As shown in FIG.
2. It includes an illumination section 10 that illuminates the frame 24, and a detection section 30 that optically detects the frame shape.

The frame mounting table 22 has an L-shape as a whole, and the mounting portion 22a is made of a transparent member. The frame 24 is placed on the mounting table 22 with the temple part for hanging on the ear open, that is, in a worn state.

The illumination unit 10 includes a light source 12 and a collimator lens 1.
4 and a reflecting mirror 16, the light source 12 is arranged at the focal position of the collimator lens 14, the light beam exiting the collimator lens 14 is made into a parallel light beam, and this is directed to the mounting section 22 by the reflecting mirror 16. .

The detection unit 30 includes a reflecting mirror 32, an imaging lens 34, and an area sensor 36.
Frame 24 placed on mounting table 22 by 4
The lens frame portion and the area sensor 36 are arranged so as to be conjugate. Therefore, area sensor 3
An image of the lens frame portion of the frame 24 is formed on 6,
Lens shape can be detected.

The data processing unit 240 stores lens refractive power data 2.
Lens curved surface function calculation unit 242, lens optical axis position data 226, and area sensor 3 inputted by 24
Lens shape data forming unit 24 to which the output of 6 is input.
4. Lens material data 222, lens curved surface function calculation section 242, and lens shape data formation section 244
The lens weight calculation unit 246 receives the output of the lens, the lens stiffness position data 228, the lens curved surface function calculation unit 242, and the lens shape data formation unit 2.
Lens thickness calculation unit 248 to which the output of 44 is input.
Consists of.

The lens curved surface function calculating section 242 calculates two lens curved surface functions of the first lens surface and the second lens surface from the lens refractive power data 224. In Fig. 4, the first lens surface is assumed to be a toroidal surface with a major axis R ₁ and a minor axis R ₂ , the origin 0 of the three-dimensional coordinates The state shown is aligned with the Z axis. And the lens surface function of the first lens surface is becomes. Also, the second lens surface has a major axis R ₁ and a minor axis R ₂
Assuming that it is a toroidal surface of , the lens surface function of the second lens surface is becomes.

Here, in a so-called external astigmatic lens that forms cylindricity on the first lens surface, R ₁ ′=R ₂ ′,
Conversely, in a so-called internal astigmatism lens that forms a cylindrical degree on the second lens surface, R ₁ =R ₂ .

The lens shape data forming unit 244 performs the following data processing from the lens optical axis position data 226 and the shape data of the lens frame portion of the frame from the area sensor 36. That is, with the lens optical axis position as the origin, a closed curve g(x) indicating the outline of the lens after beading (hereinafter referred to as a shaped lens) is determined in two-dimensional coordinates that coincide with a plane perpendicular to the lens optical axis.

The lens weight calculating section 246 calculates the weight of the shaping lens from the lens material data 222, the output of the lens curved surface function calculating section 242, and the output of the lens shape data forming section 244. This calculation is performed using the output g(x) from the lens shape data forming section 244.
From the following equation, the area φ surrounded by the closed curve, that is, the cross-sectional area of the surface perpendicular to the optical axis of the shaping lens is determined.

φ=∫g(x)dx ...(3) Next, the above area φ and lens surface function f ₁ (x,
y), f ₂ (x, y), the shaping lens volume V is determined by the following formula.

V=∫∫∫〓f ₁ (x, y) dxdy −∫∫∫〓 _{f 2} (x, y) dxdy ... (4) Here, the first term of equation (4) is the first surface of the lens and the XY plane The second equation shows the volume between the second surface of the lens and
Shows the volume between the XY plane. From the above, the weight W of the shaping lens is determined by the following equation using the specific gravity ρ of the lens material.

W=ρ{∫∫∫〓f ₁ (x, y) dxdy −∫∫∫〓f ₂ (x, y) dxdy} ...(5) The lens thickness calculation unit 248 calculates the lens thickness position data. 228, the lens curved surface functions (1) and (2), and the closed curve g(x) representing the contour of the orthopedic lens. That is, the closed curve g(x) is determined by the lens thickness position data 228.
The upper point (x _E , y _E ) is determined, and the thickness E, which is the difference in Z coordinate values between the first lens surface and the second lens surface, can be determined by the following equation.

E=f ₁ (X _E , Y _E )−f ₂ (X _E , Y _E ) ...(6) The data output section 280 is connected to the lens weight calculation section 24
A printer 282 to which the output of 6 and the output of the lens edge thickness 248 are input, and a lens curved surface function calculation unit 24
2. An image signal forming section 284 to which the outputs of the lens shape data forming section 244, lens weight calculating section 24, and lens stiffness calculating section 248 are input, and a CRT (cathode ray tube) to which the output of the image signal forming section 284 is input.
It consists of

The printer 284 prints out the weight of the orthopedic lens, which is the calculation result of the lens weight calculation section 246, and the rim thickness of the orthopedic lens, which is the calculation result of the lens stiffness calculation section 248. The image signal forming unit 284 forms an image signal representing the weight and rim thickness of the orthopedic lens, and an image signal representing the shape of the orthopedic lens from the lens shape data and the lens curved surface function.

The CRT 286 displays the data and shape of the orthopedic lens based on the image signal output from the image signal forming section 284. Also, on the CRT286 screen,
A frame image is formed by a known means, and an index 290 indicating the position of the obtained tuft thickness is displayed.

Effects of the Invention According to the eyeglass adjustment device of the first invention, by specifying the frame and the lens, the shape of the unshaped lens after being processed to match the shape of the eyeglass frame can be displayed as a figure. This has the effect of making it possible to check the shape of the eyeglass lens after processing without having to perform the beading process.

Furthermore, the display section can display the eyeglass frame fitted with the processed eyeglass lens, making it possible to check the actual wearing state of the eyeglass lens and eyeglass frame after processing without having to polish the lenses. has.

According to the eyeglass adjustment device of the second invention, the weight of the eyeglass lens after processing can be displayed on the display section, and a lens-like object having a weight equal to the displayed weight of the orthopedic lens can be attached to the eyeglass frame. By attaching the glasses, the wearer can feel the weight of the completed glasses. Therefore, by using the eyeglass adjustment device of the present invention, the eyeglass wearer can know the lens after the beading process without having to do the beading process on the eyeglass lens, and can adjust the lens to suit his/her preference. It becomes possible to select good eyeglass lenses.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the present invention, Fig. 2 is a block diagram of an embodiment of the present invention, Fig. 3 is an optical diagram of the frame shape detection section, and Fig. 4 is a coordinate diagram for calculating a lens curved surface function. It is an explanatory diagram of a system. 10...Illumination section, 14...Collimator lens,
20... Frame mounting table, 30... Detection unit, 36
... Area sensor, 100 ... Frame shape detection section, 220 ... Data input section, 240 ... Data processing section, 242 ... Lens curved surface function calculation section, 24
4... Lens shape data forming unit, 246... Lens weight calculation unit, 248... Lens thickness calculation unit,
280...Data output section.

Claims (1)

[Claims] 1. Data including the shape of the eyeglass lens after beading processing from the optical data of the eyeglass lens, the material data of the eyeglass lens, the shape data of the eyeglass frame, and the mutual position data between the eyeglass frame and the eyeglass lens. 1. An eyeglass adjustment device comprising: a calculation section that calculates , and a display section that displays the data calculated by the calculation section as a figure of an eyeglass lens after beading. 2. The eyeglass adjustment device according to claim 1, wherein the shape data of the eyeglass frame is an output of a frame shape detection section having an area sensor. 3. The eyeglass adjustment device according to claim 1, wherein the display of the data of the eyeglass lens after the beading process is a graphical representation of the external shape of the eyeglass lens. 4 a calculation unit that calculates weight data of the eyeglass lens after beading processing from optical data of the eyeglass lens, material data of the eyeglass lens, shape data of the eyeglass frame, and mutual position data between the eyeglass frame and the eyeglass lens; An eyeglass adjustment device comprising: a display section that displays the weight of the eyeglass lens after beading determined by the calculation section.