JP2679887B2 - Plate inspection equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate making apparatus,
In particular, the present invention relates to a plate inspection apparatus for producing a plate inspection used for checking the quality of a color printed matter using an ultraviolet light and an ultraviolet-sensitive photosensitive material.

[0002]

2. Description of the Related Art Conventionally, there are various types of plate inspection making apparatuses, each of which has a drawback.

[0003] One of the typical methods of the plate inspection making apparatus is an overlay method. In this method, an image is reproduced by superimposing each color material film, and it is inevitable to see the image through the film, and the image deteriorates.

[0004] In addition, there is a method called a surprint method as a method for obtaining an image on one sheet. This method is a method for obtaining an image by sequentially superimposing a photosensitive film of the four-color on a single support. This method includes Chromalin (DuPont), Match Print (3M
Co., Ltd.) and color art (Fuji Photo Film) are known, but each requires four photosensitive films and generates waste.

In addition, a color paper system is known as a method for forming a color image on one photosensitive sheet. In this method, a film original is brought into close contact with color paper, exposed using each color filter, and wet developed to obtain a color image. Fine checkers (Fuji Photo Film) and consensus (Konica) are known. I have. In this method, since the sensitivity range of the color paper is in the visible range, a dark room or an exposure device having a dark room is required for handling, and maintenance management of the developer is required.

These methods require a plurality of sheets, generate waste such as transfer sheets and toner, are difficult to handle in a bright room, and require a developing system using a developing solution. Therefore, there is a need for improvement.

On the other hand, the latent image is formed on the photo-curable composition by ultraviolet light, that components involved in the color development or decolorization by heating to form a color image by diffused in the sensitive material in accordance with the latent image A characteristic heat-developable photosensitive recording medium has been proposed, but in order to create a plate inspection using this method, an image original is passed through, the photosensitive recording medium is irradiated with ultraviolet light, and photocuring is performed in the exposed portion. To form a latent image, and then
By heating the photosensitive recording medium, a portion related to color development or decoloring of the uncured portion is diffused to form a visible image, which may be used as a plate inspection.

As the ultraviolet-sensitive photosensitive material that develops color by thermal development, a latent image in which the exposed portion of the photocurable composition is photocured by exposure is formed, and components related to the color development of the uncured portion are heated. A heat-developable photosensitive material that moves from the outside of the microcapsule to the microcapsule according to the latent image to form a colorless dye in the microcapsule to form an image, or the exposed portion of the photocurable composition is exposed to light. A cured latent image is formed, and the components related to the decolorization of the uncured part are moved by heating from the outside of the microcapsule to the microcapsule according to the latent image and the dye in the microcapsule is decolorized to form an image Heat-developable photosensitive materials are preferred. For a specific method for producing a photosensitive material and the form of the photosensitive material that can be preferably used in the present invention, see
-72358 or EP-A-0412570.
The description in A2 can be referred to.

In this case, an electrodeless light source or the like is used as a light source for emitting ultraviolet light, and the ultraviolet light generated by this electrodeless light source is filtered by a dye filter to produce cyan (C), magenta (M) and yellow, respectively. A plate inspection preparation apparatus that decomposes into a photosensitive wavelength region of the photosensitive recording medium corresponding to (Y) and irradiates the photosensitive recording medium with this ultraviolet light through an image original corresponding to each color to create a plate inspection. Conceivable.

[0010]

However, this dye filter is relatively easy to manufacture and can be manufactured in a large size, but on the other hand, it suffers from severe discoloration and low durability. Therefore, a plate inspection making apparatus using an interference filter instead of the dye filter is conceivable.

However, the interference filter is more difficult to manufacture than the dye filter, and a large size filter cannot be manufactured.
Therefore, since the structure is such that the small interference filter is arranged in the vicinity of the electrodeless light source, there is a problem that the workability of assembling the interference filter and the workability of position adjustment are not good. Further, when exposing the above ultraviolet light-sensitive material, it is necessary to replace the interference filter according to each color separation original, but this filter replacement work is complicated and the workability is poor.

In consideration of the above facts, an object of the present invention is to obtain an inspection plate making apparatus capable of improving the workability of assembling the interference filter.

[0013]

The invention according to claim 1 is for irradiating ultraviolet light to an ultraviolet-sensitive photosensitive material which forms a color image by irradiating and heating light in the ultraviolet wavelength range. A plate inspection preparation apparatus, which comprises a light source, irradiates ultraviolet light from the light source to the photosensitive material through an image original to prepare an inspection plate, which corresponds to at least three photosensitive wavelength regions of each photosensitive material. It is characterized in that it has a filter unit in which at least three filters for passing ultraviolet light in the wavelength region are provided so as to be able to enter and leave on the optical path between the light source and the image original.

The invention according to claim 2 is characterized in that the filter unit is provided with a neutral density filter for reducing the light quantity of the light source.

[0015]

According to the first aspect of the invention, the filter unit is provided with at least three filters for passing only the ultraviolet light in the wavelength region corresponding to the photosensitive wavelength region of the photosensitive material. Therefore, at least three or more filters can be assembled in the plate inspection device at the same time. For this reason, the workability of assembling the interference filter and the workability of exchanging the interference filter can be improved.

According to the second aspect of the invention, since the filter unit is provided with the neutral density filter for reducing the light amount of the light source, a high-sensitivity photosensitive material used for purposes other than the plate inspection work should also be used. You can

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS.

The plate inspection making apparatus 10 shown in FIG.
Before the actual printing using the original film that has been color-separated into plate, M, C and BK (Sumi) plates, make sure that the original film layout is correct, that there is no color difference, and that the characters are correct. This is a plate inspection production device for producing a color proof for inspecting for originals, etc.
After being positioned one by one and sequentially superimposed on an ultraviolet light-sensitive material and subjected to multiple contact exposures, heat development is performed to form a color proof.

FIG. 1 of the casing 12 of the plate inspection device 10.
At the upper left side of the image forming apparatus, a photosensitive material roll accommodating section 14 is provided. The photosensitive material roll accommodating box 14 is loaded with a magazine 18 accommodating a photosensitive material 16. An opening 14 </ b> A is provided on the upper surface of the photosensitive material roll housing 14.

A rotary knob 20 is provided on the front surface of the photosensitive material roll accommodating portion 14, and the photosensitive material 16 is opened in the opening portion 14A by rotating the rotary knob 20 in the clockwise direction.
It is to be carried out from. Photosensitive material roll storage unit 1
A cutter 22 is provided in the fourth opening 14A.
The cutter 22 is interlocked with a slide knob 24 provided at an upper part of the front surface of the photosensitive material roll accommodating section 14, and cuts the photosensitive material 16 by operating the slide knob 24. Therefore, the operator can control the photosensitive material roll storage unit 14.
The photosensitive material 16 drawn out from the nip can be cut into a predetermined length by the cutter 22.

An exposed portion 26 is formed in a substantially central portion of the upper surface of the casing 12. A rectangular notch is formed in the exposure unit 26, and a transparent glass plate 28 is inserted into the notch. Exposure section 26 of casing 12
A pair of positioning pins 30 are provided upright on the front side of the device, and the positioning pins 30 are connected to the Y, M, C, and B plates.
Each original film 32 can be easily and accurately positioned by being inserted into a positioning hole formed in an edge of each original film 32 that has been color-separated into a K (sumi) plate.

The exposure section 26 is covered with an upper lid 34. The upper lid 34 is attached to the casing 12 via a hinge 36, and the upper lid 34 can swing about the hinge 36 as a center of rotation.

As shown in FIG. 2, the upper lid 34 is a box-shaped body having an internal space 37, to which a suction pipe 38 is connected. This suction pipe 38 is
2 is connected to a blower 40 disposed therein. The blower 40 is provided with a control device 4 provided in the casing 12.
2, and the blower 40 is controlled to be turned on and off by a control device 42. Therefore, when the blower 40 operates, the upper lid 3 is moved through the suction pipe 38.
The inside of the internal space 37 is sucked and decompressed.

A plurality of small holes 35 are formed in the surface (pressing surface) 34A of the upper lid 34 which presses the photosensitive material 16, and when the internal space 37 of the upper lid 34 is depressurized, the pressing surface. The photosensitive material 16 is adsorbed on 34A.

As shown in FIG. 3, a Fresnel lens 29 is closely attached to the lower portion of the glass plate 28 in the casing 12 so that the photosensitive material 16 is irradiated with parallel light through each original film 32. Has become. An electrodeless light source 44, which is a light source, is provided below the Fresnel lens 29. The electrodeless light source 44 includes a reflector 46 having a substantially hemispherical shape. A position slightly shifted from the focal point of the reflector 46 to the opposite side (the lower side in FIG. 3) of the glass plate 28 is defined as the electrodeless light source 44. Is a light emitting point 48. Accordingly, a part of the light emitted from the light emitting point 48 is emitted as direct light toward the glass plate 28, and a part of the light emitted from the light emitting point 48 is reflected light reflected by the reflector 46. Is irradiated in the direction of the glass plate 28.

In the vicinity of the electrodeless light source 44 between the electrodeless light source 44 and the Fresnel lens 29, a filter unit 49 is easily arranged in the casing 12 of the plate inspection device 10. The filter unit 49 includes a disk-shaped turret 50 and a drive motor 52 having a drive shaft connected to the shaft center of the turret 50. Turret 5
No. 0 is provided with four circular holes 54 at substantially equal intervals around the axis, and these circular holes 54 are provided in the Y plate, the M plate, the C plate, and the B plate.
Three interference filters 56 and transparent glass 5 for exposing corresponding to the K (Sumi) plate color separation original film 32
7 and are attached.

In the present embodiment, in the case of a positive type photosensitive material, the original film 32 is a Y plate and a BK (smear) plate,
The BK (Sumi) plate is superimposed on the M plate and the BK (Sumi) plate is superimposed on the C plate, and the BK (sumi) plate is brought into close contact with the photosensitive material in order. , The photosensitive wavelength region of the photosensitive material corresponding to yellow (Y) (C = 400 to 435 nm, M = 365 to 400 nm,
(Y = 330 to 365 nm), and the exposure is performed three times by decomposing by the interference filter 56 (state of FIG. 3). In the case of a negative type photosensitive material, the original film 32 is a Y plate, M
The plate, the C plate, and the BK (sumi) plate are sequentially brought into close contact with the photosensitive material 14, and the ultraviolet light generated by the electrodeless light source 44 is exposed to cyan (C), magenta (M), and yellow (Y), respectively. A transparent glass 57 which decomposes into the photosensitive wavelength region of the material by the interference filter 56 and transmits ultraviolet light in the entire photosensitive wavelength region of the photosensitive material corresponding to BK (smudge).
Exposure. Further, only the filter insertion hole may be used without using the transparent glass, or a neutral gray filter may be used. In addition, at the time of exposure corresponding to this BK,
Instead of the transparent glass 57 or the neutral gray filter, a correction filter having absorption in the ultraviolet region may be used to correct the spectral sensitivity in the ultraviolet light sensitive region.

The interference filter 56 may have one filter for each transmission wavelength range, but it is preferable to combine two or more filters to narrow the half-value width.

The drive motors 52 are respectively stepping motors, and the drive motors 52 are control devices 42.
The turret 50 is rotated by a predetermined angle in response to a signal from the above, and each interference filter 56 and the transparent glass 57 are selectively put in and taken out from the optical path between the electrodeless light source 44 and the Fresnel lens 29. In addition, the control device 42
Is connected to a filter selection button 62 provided on the front side of the exposure unit 26 of the casing 12, and the control device 42 is selected by the filter selection button 62.
The rotation of the drive motor 52 is controlled so that the interference filter is inserted on the optical path between the electrodeless light source 44 and the Fresnel lens 29.

The filter selection button 62 is used for the original film C, M, and Y original films 32, which are the original film types.
, The filter selection buttons 62A, 62B,
62C and a filter selection button 62D for the BK (sumi) plate original film 32 in the case of a negative photosensitive material.

An exposure start button 63 and an exposure stop button 65 are provided near the filter selection button 62, and the exposure start button 63 and the exposure stop button 65 are connected to the control device 42, respectively. .

A heat insulating filter 45 is arranged between the interference filter 56 and the light source 44, and thereby prevents the interference filter 56 from rising in temperature. In addition, the interference filter 5
A blow port of the blower 55 is open near 6 to prevent the temperature of the interference filter 56 from rising due to the blow from the blower 55.

A temperature sensor 58 is attached to each interference filter 56. These temperature sensors 58 are connected to the control device 42, and when the temperature of the interference filter 56 exceeds a predetermined value, the control device 42 prohibits the start of the exposure processing and also causes the temperature of the interference filter 56 to rise. If the temperature becomes equal to or lower than the predetermined temperature, the control device 42 can start the exposure process. Further, on the front side of the exposure unit 26 of the casing 12,
A lamp 60 for warning the temperature rise is provided, and the lamp 60 blinks according to the output of the control device 42.

As shown in FIG. 3, a louver 64 is arranged on the side of the electrodeless light source 44 of the interference filter 56 along the optical path.

As shown in FIG. 4, the louver 64 is composed of a plurality of (7 to 8) ring-shaped fins 66A, 66B, ... Arranged coaxially, and each fin 66A. , 66B, ... Are connected to each other by two beams intersecting at substantially right angles passing through the axis. Are enlarged from the electrodeless light source 44 side (the lower side in FIG. 4) to the interference filter 56 side, and the fins arranged on the outer side increase in diameter. The rate has been increased. Also, the outermost fin 66A (louver 6)
4) The maximum diameter D is approximately 160 mm, and the louver 64
Has a length M of 40 mm in the optical path direction. Therefore, the louver 64 allows only the light incident at a predetermined range of the incident angle of the light emitted from the electrodeless light source 44 to pass through. That is, only the direct light emitted from the light emitting point 48 and the light reflected by the reflector 46 and incident on the louver 64 from substantially the same direction as the direct light of the reflected light can pass through the louver 64. I have.

As shown in FIG. 3, on the electrodeless light source 44 side of the louver 64, an integrating light quantity meter 68 as a light quantity integrating means is provided.
Are arranged, and the light receiving section 68A of the integrating light meter 68 is provided.
Is inserted in the optical path between the interference filter 56 and the electrodeless light source 44. The integrated light meter 68 is connected to the control device 4
2 and the control device 42 includes an integrated light meter 68
The amount of exposure is calculated based on the input of (1), and when the amount of exposure reaches a predetermined value, the electrodeless light source 44 is turned off.

As shown in FIG. 5, the control device 42 includes a microcomputer 70. The micro computer 70 includes a CPU 72, a RAM 74, an R
It comprises an OM 76, an input / output port 78, and a bus 80 such as a data bus or control bus connecting these.

The stepping motor 52, the electrodeless light source 44, the blower 40, the temperature sensor 58, etc. are connected to the input / output port 78 of the microcomputer 70 via a driver 82.

As shown in FIG. 1, a heat developing section 84 is provided on the right side of the casing 12 of the plate inspection making apparatus 10, and a photosensitive material insertion hole 8 is provided above the heat developing section 84.
4A is drilled. Further, in the heat developing section 84, one heat roller 86 and a belt 87 are built in. A heater (not shown) and a temperature sensor (not shown) of the heat roller 86 are respectively connected to the control device 42, and the heat roller 86 is controlled to be heated to a predetermined temperature by the control device 42. Therefore, the exposed photosensitive material 1 inserted from the photosensitive material insertion hole 84A
6 is conveyed along the belt 87 and is heated by the heat roller 86.
The photosensitive material 16 is conveyed while being in contact with it for about 3/4 rotation, and is thereby heat-developed.
Further, on the right side surface of the heat developing portion 84, the photosensitive material carry-out hole 84
B is bored, and the heat-developable photosensitive material 88 is discharged from the photosensitive material discharge hole 84B, and is accommodated in the tray 90 disposed below the photosensitive material discharge hole 84B. There is.

The operation of this embodiment will be described below with reference to the control flow chart of FIG. First, the operator places the original film 32, for example, Y, on the exposure unit 26 of the plate inspection making device 10.
Set the BK (Sumi) plate on top of the plate. in this case,
The operator inserts the positioning pins 30 on the near side of the exposure unit 26 into the positioning holes formed in the edge of each original film 32. Thereby, the positioning of each original film 32 can be performed easily and accurately.

Next, the operator cuts the photosensitive material 16 pulled out from the photosensitive material roll accommodating portion 14 into a predetermined length by the cutter 22, and makes it adhere to the original film 32 to close the upper lid 34.

On the other hand, when the power switch of the plate inspection making apparatus 10 is turned on, the controller 42 is activated to start the temperature control of the heat roller 86 of the heat developing section 84, and it is detected that the temperature is optimum for heat developing. The plate preparation preparation state is entered, and the control routine of FIG. 6 is started.

When the control routine is started, step 1
In step 02, the blower 40 is turned on, and in step 104, it is determined which of the filter selection buttons 62A, 62B, 62C and 62D has been pressed.

In step 104, if the original film 32 to be exposed is selected as the Y plate, the drive motor 52 is rotated in step 106 so that the interference filter A corresponding to the original film 32 to be exposed is arranged at a predetermined position. The angle is controlled and inserted into the optical path. If the original film 32 to be exposed is selected as the M plate, the original film 3 to be exposed
In step 106, the rotation angle of the drive motor 52 is controlled so that the interference filter B corresponding to the second filter is disposed at a predetermined position, and the interference filter B is inserted into the optical path. Original film 3 to be exposed
2 is selected as the C plate, the original film 32 to be exposed is
In step 106, the rotation angle of the drive motor 52 is controlled so that the interference filter C corresponding to the above is disposed at a predetermined position, and is inserted into the optical path.

In the case of the negative type, in addition to the interference filters A, B and C described above, a filter selection button 62D is pressed as a BK (sumi) plate original film, so that a transparent glass (or a medium gray filter) is used. ) Insert 57.

As described above, since the interference filter 56 in the photosensitive wavelength region of the photosensitive material corresponding to the original film 32 is selected and inserted in the optical path, each of the photosensitive materials corresponding to the type of the original film is used as the photosensitive material. It can be exposed to ultraviolet light in the photosensitive wavelength range.

In this way, the first interference filter corresponding to the first original film 32 to be exposed is selected (step 106).

In step 108, it is determined whether or not the exposure start button 63 has been pressed. When the exposure start button 63 is pressed, in step 112, the temperature T of the interference filter 57 inserted in the optical path is detected by the temperature sensor 58, and the temperature T of the interference filter 57 detected by the temperature sensor 58 is It is determined whether or not the predetermined value T0 is exceeded. If the temperature of the interference filter exceeds the predetermined value, the process proceeds to step 116, where the electrodeless light source 44 is not turned on, and the lamp 60 is turned on and off as a warning until the temperature of the interference filter falls below the predetermined value. Return to If the temperature of the interference filter is equal to or lower than the predetermined value, the process proceeds to step 114. In step 114, the exposure amount Pi (i = Y,
(Corresponding to any one of the M, C, and BK versions), and proceeds to step 118. In step 118, the electrodeless light source 44 is turned on to start exposure.

Therefore, it is possible to automatically prevent the exposure from being performed in a state where the filter characteristic of the interference filter is changed by heating, so that an image such as a color mixture due to a change in the absorption characteristic of the filter of the interference filter due to heating is formed. It is possible to prevent quality deterioration. Further, by blinking the lamp 60, it is possible to notify the worker that the temperature of the interference filter has risen.

When the electrodeless light source 44 is turned on, measurement of the exposure amount is started based on the output from the integrated photometer 68 in step 120, and the process proceeds to step 122.
In step 122, it is determined whether or not the exposure amount P has reached a predetermined exposure amount Pi. If the exposure amount P has reached the exposure amount Pi corresponding to the original film 32, the process proceeds to step 124, where the electrodeless light source 44 is turned off.

As described above, since the photosensitive material is irradiated with the exposure amount corresponding to the type of the original film 32, even if the original film 32 is replaced, the exposure amount is irradiated with the appropriate exposure amount according to the type of the original film 32. It Thus, the operator can perform the operation without changing the exposure amount depending on the type of the original film 32. Further, the light receiving section 68A of the integrated light meter 68 is inserted in the optical path between the interference filter 56 and the electrodeless light source 44. Therefore, it is possible to reliably integrate the light amounts of the light emitted from the electrodeless light source 44 and before being incident on the interference filter 56. Therefore, even when the electrodeless light source 44 is deteriorated and the light amount is reduced, the necessary light amount can be applied to the photosensitive material 16 and the quality of an exposed image due to insufficient exposure can be prevented.

The blower 40 remains in the operating state during the exposure of each original film, and when the operator opens the upper cover 34, the photosensitive material 16 is covered with the upper cover 3.
It is stuck on 6. For this reason, the worker is required to
The document film 32 can be easily replaced without the necessity of performing the alignment of the document film 6. When the exchange of the original film 32 is completed and the upper cover 34 is closed, the process returns to step 102, and waits until the next filter is selected by the filter selection button 62, and then the exposure of the next original film 32 is started. You. In this way, when the exposure of the first original film is completed, the process returns to step 104, and the same exposure operation is performed a total of four times for a negative photosensitive material and a total of three times for a positive photosensitive material. Done.

On the other hand, when all the exposure of each original film 32 is completed and the operator presses the exposure stop button 65, it is determined in step 110 that the exposure work is completed, and the process proceeds to step 126 and the blower 40 is operated. The control routine is stopped, and this control routine ends.

After that, when the worker inserts the exposed photosensitive material 16 into the thermal developing portion 84 through the photosensitive material insertion hole 84A, the photosensitive material 16 inserted into the thermal developing portion 84 is
The sheet is nipped and conveyed by a pair of heat rollers 86, thermally developed, and discharged from the photosensitive material discharge hole 84 </ b> B to the tray 90.

Further, in this embodiment, the filter unit 49 is provided with three interference filters 56 and transparent glass 57 for passing only the ultraviolet light in the wavelength region corresponding to each original film 32. . Therefore, when assembling the three interference filters 56 and the transparent glass 57, by assembling the filter unit 49,
Very easily, the three interference filters 56 and the transparent glass 5
7 and can be assembled. Therefore, the workability of assembling the interference filter and the workability of the replacement work of the filter can be improved.

Next, a second embodiment of the present invention will be described with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 7, the filter unit 49 of this embodiment has disk-shaped turrets 50 and 51, and drive motors 52 and 53 having drive shafts connected to the respective shaft centers of the turrets 50 and 51. It consists of and. The turret 51 at a position substantially symmetrical with respect the axis, the circular hole 55 are two bored, to one of these circular holes 55, sensitive
A neutral density filter 59 for reducing the light quantity of the electrodeless light source 44 is attached according to the sensitivity of the optical material 16 , and the other circular hole 55
Is a through hole.

The drive motor 53 is a stepping motor, and the drive motor 53 is the control device 4.
The turret 51 is rotated by a predetermined angle in accordance with a signal from 2, and one of the dimming filter 59 and the through hole is inserted into the optical path between the electrodeless light source 44 and the Fresnel lens 29. . Further, the control device 42 is connected to a light amount selection button 67 provided on the front side of the exposure unit 26 of the casing 12, and the control device 42 selects a dimming filter 59 selected by the light amount selection button 67. One of the through holes is the electrodeless light source 44 and the Fresnel lens 2
Drive motor 53 so that it is inserted in the optical path between
Is controlled to rotate.

Therefore, in step 102, when either the dimming filter 59 or the through hole is selected by the light amount selection button 67 according to the photosensitive material 16 to be exposed,
The drive motor 53 is rotationally controlled in accordance with either one of the selected dimming filter 59 and the through hole, and either one of the selected dimming filter 59 and the through hole is inserted on the optical path. Further, in this embodiment, the filter unit 49 is provided with three interference filters 56, a transparent glass 57, and a neutral density filter 59 for passing ultraviolet light in the wavelength region corresponding to each color separation original film 32. There is.
Therefore, when assembling the three interference filters 56, the transparent glass 57 and the dimming filter 59, by assembling the filter unit 49, the three interference filters 56, the transparent glass 57 and the dimming filter can be very easily mounted. Filter 5
9 can be assembled. Therefore, the workability of assembling the interference filter and the workability of the replacement work of the filter can be improved.

In the first and second embodiments, the filter unit 49 is provided with the drive motor 52,
Although the structure including 53 is used, the filter unit 49 may be replaced with a structure in which the drive motors 52 and 53 are not included. In addition, in the first and second embodiments, each filter is attached to the disc-shaped turrets 50 and 51. Instead of this, each sheet-shaped filter is taken out from the filter accommodating portion. A structure may be adopted in which the filter is inserted into the optical path and after the exposure is completed, the filter is stored in the filter housing portion.

Further, at least three interference filters, one neutral density filter and transparent glass may be provided in one turret.

[0062]

Since the present invention has the above-mentioned structure, it is possible to obtain an excellent effect that the workability of assembling the interference filter can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a plate inspection making device according to a first embodiment of the present invention, as viewed obliquely from the front.

FIG. 2 is a side sectional view showing an upper lid of the plate inspection making device according to the first embodiment of the present invention.

FIG. 3 is a schematic sectional view showing an exposure unit of the plate making apparatus according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a louver of the plate inspection apparatus according to the first embodiment of the present invention.

FIG. 5 is a control block diagram of the plate inspection creating apparatus according to the first embodiment of the present invention.

FIG. 6 is a control flowchart of the plate inspection creating apparatus according to the first embodiment of the present invention.

FIG. 7 is a schematic sectional view showing an exposure section of a plate inspection making device according to a second embodiment of the present invention.

[Explanation of symbols]

 10 Plate inspection device 16 Photosensitive material 32 Original film (image original) 44 Electrode-free light source (light source) 49 Filter unit 50 Turret 51 Turret 52 Drive motor 53 Drive motor 56 Interference filter 57 Transparent glass 59 Light reduction filter

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G03F 7/20 511 G03F 7/20 511

Claims (2)

(57) [Claims] 1. A light source for irradiating ultraviolet light to an ultraviolet-sensitive photosensitive material that forms a color image by irradiating and heating light in the ultraviolet wavelength range, and the ultraviolet light from the light source is used as an image original. A plate making device for making a plate inspection by irradiating the light-sensitive material through the plate, wherein at least three plates for passing ultraviolet light in a wavelength region corresponding to at least three light-sensitive wavelength regions of each light-sensitive material. 2. A plate inspection making apparatus, comprising: a filter unit that is provided so as to be able to enter and leave each of the filters in the optical path between the light source and the image original. 2. The plate inspection making apparatus according to claim 1, wherein the filter unit is provided with a neutral density filter for reducing a light quantity of the light source.