JPH04323637A - Inspecting plate producing device - Google Patents

Abstract

PURPOSE:To restrict the incident angle of light made incident on an interference filter and to improve the quality of an image in an inspecting plate producing device which produces an inspecting plate used in the case of checking the quality of a color printed matter of ultraviolet rays and ultraviolet photosensitive material. CONSTITUTION:An interference filter unit 49 is arranged in the vicinity of a non-electrode light source 44 between a Fresnel lens 29 and the light source 44. A louver 64 is arranged between the unit 49 and the light source 44, and only the light made incident on the louver 64 at the incident angle within a specified range, out of the light radiated from the light source 44 and the light reflected by a spherical reflector, passes through the louver 64 and made incident on the interference filter 56.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an apparatus for making an inspection plate using ultraviolet light, and in particular, an inspection plate for making an inspection plate using ultraviolet light and an ultraviolet-sensitive photosensitive material, which is used when checking the quality of color printed matter. Regarding the creation device.

0002

[Prior Art] When a printing machine prints a large amount of color printing, for example, color advertisements (so-called insert advertisements) attached to newspapers, etc., a plate inspection device (color proof production device) is used before printing with the printing press. ) to check in advance before actual printing. A method using color paper is known as a method for creating a color proof. In this method, a color-separated document is placed in close contact with color paper, and a color filter is applied to sequentially expose the original. The exposed photosensitive material is developed, bleach-fixed, washed with water, and dried. In this method, since the light emitting range of the color paper is in the visible range, a dark room or an exposure device equipped with a dark room is required for handling the color paper, and a processing liquid is required.

[0003] In addition, as another method, four
There is a method in which images of color separation films are sequentially superimposed and transferred, but four films are required and waste is generated.

[0004] In this ultraviolet-sensitive photosensitive material that develops color by heat development, a latent image is formed by photocuring the exposed areas of the photocurable composition upon exposure, and the components involved in coloring in the uncured areas are cured by heating. A heat-developable photosensitive material that moves from outside the microcapsules into the microcapsules in response to a latent image and colors the colorless dye in the microcapsules to form an image, or a photocurable composition whose exposed areas are exposed to light when exposed to light. A hardened latent image is formed, and when heated, components involved in decoloring the uncured portion move from outside the microcapsule into the microcapsule according to the latent image, decolorizing the dye inside the microcapsule and forming an image. A heat-developable photosensitive material is preferred. Regarding the specific manufacturing method and form of the photosensitive material that can be preferably used in the present invention, please refer to
-72358 or European Published Patent No. 0412570
You can refer to the description in A2.

Of course, the plate inspection apparatus of the present invention can be used not only for the above-mentioned ultraviolet-sensitive photosensitive material that develops color through heat development, but also for various conventionally known photosensitive recording materials such as lithographic film and bright room lithographic material. It can also be used for image exposure of paper, etc.

[0006]

[Problems to be Solved by the Invention] By the way, ultraviolet-sensitive photosensitive materials that develop color by heat development have been proposed. To create a color proof using this ultraviolet-sensitive photosensitive material, a light source that emits ultraviolet light, such as an electrodeless light source, is used, and this ultraviolet light is emitted at least three times according to the wavelength of the photosensitive region. It is necessary to divide the image into two parts and perform exposure. One possible method for dividing this ultraviolet light is to use a dye filter. However, the dye filter
Although it is relatively easy to manufacture and can be manufactured in large sizes, it suffers from severe discoloration and low durability. For this reason, it is conceivable to use an interference filter instead of the dye filter.

However, due to its characteristics, interference filters have a problem in that the half-width of transmitted light widens depending on the angle of incidence of incident light that enters the interference filter. Therefore, when using an interference filter, the thickness of the film, the distribution of the vapor deposited substance, etc. are adjusted in advance on the interference filter in accordance with the angle of incidence of the light that is directly incident from the light source. It is necessary to narrow the half-width.

On the other hand, when an electrodeless light source is used as a light source, a reflection plate is essential due to its structure, and the interference filter uses the light reflected by this reflection plate to pass through the electrodeless light source. The incident angle is different from that of the direct light incident directly from the light emitting point. As a result, the half-width of the transmitted light is widened, and the light that enters the photosensitive material through the color-separated original has an intensity distribution, which causes problems such as color mixture, which degrades image quality, and causes color shifts in color images. Ta.

[0009] In consideration of the above-mentioned facts, the present invention aims to provide an ultraviolet light inspection plate making device that can limit the angle of incidence of light incident on an interference filter and improve the quality of exposed images.

0010

[Means for Solving the Problems] The invention as set forth in claim 1 provides a method for irradiating ultraviolet light on an ultraviolet-sensitive photosensitive material that forms a color image by irradiating and heating light in the ultraviolet wavelength range. An inspection plate making device that includes a light source and creates an inspection plate by irradiating the photosensitive material with ultraviolet light from the light source through an image original, the interference device being arranged between the light source and the image original. It is characterized by comprising a filter and a light selective transmission means that is disposed between the interference filter and the light source and allows only light incident at a predetermined range of incident angles to pass through.

Further, the invention according to claim 2 is provided with a light source for irradiating ultraviolet light to an ultraviolet-sensitive photosensitive material that develops visible color by irradiating light in the ultraviolet wavelength range and heating it, and the light source A test plate making device that creates a test plate by irradiating the photosensitive material with ultraviolet light from an image source through an image document, the device including an interference filter disposed between the light source and the image document; The light source is characterized by being an electrodeless light source having a substantially hemispherical reflecting plate and a light emitting point placed approximately at the center of the reflecting plate.

0012

[Operation] In the invention as set forth in claim 1, of the light emitted from the light source, only the light that is incident on the light selective transmission means at an incident angle within a predetermined range passes through the light selective transmission means and enters the interference filter. do. Therefore, the angle of incidence of the incident light on the interference filter can be limited, thereby improving the quality of the image.

In the invention as claimed in claim 2, the light source is an electrodeless light source in which the light emitting point is placed approximately at the center of the substantially hemispherical reflecting plate, so that the reflected light reflected by the reflecting plate is directed to the light emitting point. will be returned to. Therefore, the angle of incidence of the incident light on the interference filter can be limited, thereby improving the quality of the image.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

The plate inspection production device 10 shown in FIG. 1 checks the original film before actual printing using each original film color-separated into Y, M, C, and BK (black) versions. This plate-inspection device is used to create color proofs to check whether there are any errors in the layout, colors, or typographical errors. After sequentially stacking the photosensitive material on multiple contact exposures, it is thermally developed to create a color proof.

FIG. 1 of the casing 12 of the plate inspection device 10
A photosensitive material roll storage section 14 is provided at the upper left side of the photosensitive material roll storage box 14, and a magazine 18 containing photosensitive material 16 is loaded in this photosensitive material roll storage box 14. Furthermore, an opening 14A is provided on the upper surface of the photosensitive material roll storage section 14.

A rotary knob 20 is provided on the front surface of the photosensitive material roll storage section 14, and by rotating this rotary knob 20 clockwise, the photosensitive material 16 is moved into the opening 14A.
It is now being removed from the Photosensitive material roll storage section 1
A cutter 22 is provided in the opening 14A of No. 4. The cutter 22 is linked to a slide knob 24 provided on the upper front surface of the photosensitive material roll storage section 14, and the photosensitive material 16 is cut by operating the slide knob 24. Therefore, the operator must
The cutter 22 can cut the photosensitive material 16 pulled out into a predetermined length.

A substantially central portion of the upper surface of the casing 12 is an exposure portion 26 . A rectangular cutout is formed in the exposure section 26, and a transparent glass plate 28 is inserted into the cutout. Exposure section 26 of casing 12
A pair of positioning pins 30 are erected on the front side of the
Each original film 32 can be easily and accurately positioned by inserting the original film 32 color-separated into a K (black) plate into a positioning hole drilled in the edge.

The exposure section 26 is covered with an upper lid 34. The upper lid 34 is attached to the casing 12 by a hinge 36, and the upper lid 34 is swingable around the hinge 36.

As shown in FIG. 2, the upper lid 34 is a box-shaped body having an internal space 37, and a suction pipe 38 is connected thereto. This suction pipe 38 is connected to the casing 1
It is connected to a blower 40 disposed within 2. This blower 40 includes a control device 4 provided within 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
The inside of the internal space 37 of No. 4 is suctioned and the pressure is reduced.

A plurality of small holes 35 are bored in the surface (pressing surface) 34A of the upper lid 34 that 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 attracted to 34A.

As shown in FIG. 3, a Fresnel lens 29 is closely attached to the lower part of the glass plate 28 in the casing 12 so that parallel light is irradiated onto the photosensitive material 16 through each original film 32. It has become. Further, below the Fresnel lens 29, an electrodeless light source 44, which is a light source, is arranged. The electrodeless light source 44 includes a reflecting plate 46 having a substantially hemispherical shape. This is the light emitting point 48. Therefore, 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 reflecting plate 46. The light is irradiated in the direction of the glass plate 28.

An interference filter unit 4 is disposed near the electrodeless light source 44 between the electrodeless light source 44 and the Fresnel lens 29.
9 is placed. The interference filter unit 49 includes a disk-shaped turret 50 and a drive motor 52 having a drive shaft connected to the axis of the turret 50. The turret 50 has four circular holes 54 formed at approximately equal intervals around the axis, and these circular holes 54 have Y
Three interference filters 56 and a transparent glass 57 are attached for exposing the original film 32 of the plate, M plate, C plate, and BK (black) plate, respectively.

In this embodiment, in the case of a positive type photosensitive material, the original film 32 is a Y plate, a BK (black) plate,
A BK (black) plate is stacked on the M plate, and a BK (black) plate is stacked on the C plate, and they are brought into close contact with the photosensitive material in order, and the ultraviolet light generated by the electrodeless light source 44 is applied to cyan (C) and magenta (M), respectively. , the sensitive wavelength range of the photosensitive material corresponding to yellow (Y) (C=400-435 nm, M=365-400 nm
m, Y=330 to 365 nm) and is separated and exposed using an interference filter 56 (state in FIG. 3). In addition, in the case of a negative photosensitive material, the original film 32 may be a Y version or an M plate.
A plate, a C plate, and a BK (black) plate are successively brought into close contact with the photosensitive material 14, and the ultraviolet light generated by the electrodeless light source 44 is applied to the photosensitive material corresponding to cyan (C), magenta (M), and yellow (Y), respectively. A transparent glass 57 that separates ultraviolet light into the photosensitive wavelength range of the material by an interference filter 56 and passes ultraviolet light in the entire photosensitive wavelength range of the photosensitive material corresponding to BK (black).
Exposure is performed by Further, only a filter insertion hole may be used without using transparent glass, or a neutral gray filter may be used. In addition, for 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 sensitive region.

[0025] Although one interference filter 56 may be used for each transmission wavelength range, it is preferable to combine two or more filters to narrow the half-width.

The drive motor 52 is constituted by a stepping motor, and rotates the turret 50 by a predetermined angle in response to a signal from the control device 42, and rotates each interference light on the optical path between the electrodeless light source 44 and the Fresnel lens 29. filter 56
and transparent glass 57 can be selectively taken in and out. The control device 42 also includes a filter selection button 62 provided on the front side of the exposure section 26 of the casing 12.
The control device 42 controls the rotation of the drive motor 52 so that the interference filter selected by the filter selection button 62 is inserted on the optical path between the electrodeless light source 44 and the Fresnel lens 29. It is supposed to be done.

Further, the filter selection button 62 is used to select the type of original film such as C version, M version, and Y version original film 32.
Filter selection buttons 62A, 62B,
62C and a filter selection button 62D for BK (black) version original film 32 in the case of 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 exposure stop button 65 are connected to the control device 42, respectively. .

A heat shielding filter 45 is disposed between the interference filter 56 and the light source 44, thereby preventing the interference filter 56 from rising in temperature. In addition, the interference filter 5
An air outlet of an air blower 55 is open near 6, and the temperature of the interference filter 56 is prevented from rising by the air blown from the air blower 55.

Furthermore, 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 exposure and also reduces the temperature of the interference filter 56. When the temperature falls below a predetermined temperature, the control device 42 enables the start of exposure. Further, a lamp 60 for warning of a temperature rise is provided on the front side of the exposure section 26 of the casing 12, and is made to blink according to the output of the control device 42.

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

As shown in FIG. 4, the louver 64 is composed of a plurality of ring-shaped fins 66A, 66B, . . . coaxially arranged. , 66B, . . . are connected to each other by two beams passing through the axis and intersecting each other at approximately right angles. Further, each fin 66A, 66B... is connected to the electrodeless light source 44 side (
The diameter of the fins increases from the lower side of FIG. 4 toward the interference filter 56 side, and the farther the fins are disposed, the greater the rate of diameter expansion. In addition, the outermost fin 66A (louver 64
) is approximately 160 mm, and the louver 64
The length M in the optical path direction is 40 mm. Therefore,
The louver 64 is configured to allow only the light emitted from the electrodeless light source 44 that is incident at a predetermined range of incident angles to pass therethrough. That is, only the direct light emitted from the light emitting point 48 and the light reflected by the reflection plate 46 and incident on the louver 64 from substantially the same direction as the direct light among the reflected light can pass through the louver 64. There is.

As shown in FIG. 3, an integrating light meter 68 is arranged on the electrodeless light source 44 side of the louver 64. This integrating light meter 68 is connected to the control device 42,
The control device 42 calculates the cumulative amount of light based on the input from the cumulative light amount meter 68, and turns off the electrodeless light source 44 when the cumulative amount of light reaches a predetermined value.

As shown in FIG. 5, the control device 42 includes a microcomputer 70. As shown in FIG. The microcomputer 70 includes a CPU 72, a RAM 74, and a
It is composed of an OM 76, an input/output port 78, and a bus 80 such as a data bus or a control bus that connects these.

A stepping motor 52, an electrodeless light source 44, a blower 40, a 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 device 10, and a photosensitive material insertion hole 8 is provided above the heat developing section 84.
4A is drilled. Moreover, one heat roller 86 and a belt 87 are built into the heat developing section 84. A heater (not shown) and a temperature sensor (not shown) of the heat roller 86 are each connected to the control device 42, and the control device 42 controls heating of the heat roller 86 to a predetermined temperature. Therefore, the exposed photosensitive material 16 inserted through the photosensitive material insertion hole 84A
The photosensitive material 16 is conveyed along the belt 87 and is conveyed while being in contact with the photosensitive material 16 during about 3/4 rotation around the circumference of the heat roller 86, thereby being thermally developed. Further, on the right side of the heat developing section 84, there is a photosensitive material carrying-out hole 84.
The photosensitive material 88 that has been thermally developed is discharged from this photosensitive material discharge hole 84B, and is stored in a tray 90 disposed below the photosensitive material discharge hole 84B. There is.

The operation of this embodiment will be explained below with reference to the control flowchart shown in FIG. First, the operator places the original film 32, for example, Y
Set the BK (black) plate over the plate. in this case,
The operator inserts the positioning pin 30 on the front side of the exposure section 26 into the positioning hole bored in the edge of each original film 32. Thereby, each original film 32 can be positioned 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 using the cutter 22, places the photosensitive material 16 on the original film 32, and closes the top cover 34.

On the other hand, when the power switch of the plate inspection device 10 is turned on, the control device 42 is activated to start controlling the temperature of the heat roller 86 of the thermal development section 84, and when the temperature reaches the optimum temperature for thermal development, the detection is performed. The plate preparation preparation state is entered, and the control routine shown in 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, in step 106 the drive motor 52 is rotated so that the interference filter A corresponding to the original film 32 to be exposed is placed at a predetermined position. The angle is controlled and the beam is 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 is
In step 106, the rotation angle of the drive motor 52 is controlled so that the interference filter B corresponding to No. 2 is placed at a predetermined position, and is inserted into the optical path. Original film 3 to be exposed
2 as the C plate, the original film 32 to be exposed
In step 106, the rotation angle of the drive motor 52 is controlled so that the interference filter C corresponding to the interference filter C is placed at a predetermined position, and the drive motor 52 is inserted into the optical path.

In the case of a negative type, in addition to the interference filters A, B, and C mentioned above, the filter selection button 62D is pressed as a BK (black) version original film, so a transparent glass (or medium gray filter) is pressed. )57 is inserted.

In this way, since the interference filter 56 in the sensitive wavelength range of the photosensitive material corresponding to the original film 32 is selected and inserted on the optical path, the photosensitive material has the following characteristics: 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 into 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 it exceeds a predetermined value T0. 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 blinked as a warning until the temperature of the interference filter falls below the predetermined value, and step 108 is performed. Return to If the temperature of the interference filter is below the predetermined value, the process advances to step 114. In step 114, the exposure amount Pi (i=Y,
(corresponding to any one of the M, C, and BK versions) is read, and the process advances to step 118. In step 118, the electrodeless light source 44 is turned on to start exposure.

Therefore, it is possible to automatically prevent exposure from being carried out in a state where the filter characteristics of the interference filter have changed due to heating. Quality deterioration can be prevented. Further, by blinking the lamp 60, it is possible to notify the operator that the temperature of the interference filter has increased.

When the electrodeless light source 44 is turned on, measurement of the exposure amount is started in step 120 based on the output from the integrating light meter 68, 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, and the electrodeless light source 44 is turned off.

In this way, since the photosensitive material is irradiated with the exposure amount depending on the type of original film 32, even if the original film 32 is replaced, it will not be irradiated with the appropriate amount of exposure depending on the type of original film 32. Ru. This allows the operator to work without changing the amount of exposure depending on the type of document film 32.

The blower 40 remains in operation during the exposure of each original film, and when the operator opens the upper lid 34, the photosensitive material 16 is exposed to the upper lid 3.
It is attached to 6. For this reason, the operator must
There is no need to perform positioning of the original film 32, and the original film 32 can be easily replaced. When the replacement of the original film 32 is completed and the top lid 34 is closed, the process returns to step 102.
After the next filter is selected by the filter selection button 62, exposure of the next original film 32 is started. In this way, when the exposure of the first original film is completed, the process returns to step 104, and a similar exposure operation is performed.
In the case of a negative type photosensitive material, the process is repeated four times in total, and in the case of a positive type photosensitive material, the process is performed three times in total.

On the other hand, when 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 finished, and the process proceeds to step 126, where the blower 40 is turned on. The control routine is then stopped.

Thereafter, when the exposed photosensitive material 16 is inserted into the thermal development section 84 through the photosensitive material insertion hole 84A by the operator, the photosensitive material 16 inserted into the thermal development section 84 is
The photosensitive material is conveyed by a pair of heat rollers 86, thermally developed, and discharged onto a tray 90 from a photosensitive material discharge hole 84B.

In this embodiment, an electrodeless light source 44 is used as the light source, and ultraviolet light emitted from the electrodeless light source 44 is irradiated onto the photosensitive material 16 via an interference filter 56. Therefore, the interference filter 56 transmits only ultraviolet light in the ultraviolet sensitive wavelength range that forms a predetermined dye image in one exposure, and does not transmit ultraviolet light in the ultraviolet sensitive wavelength range that forms other dye images. Therefore, color proofs with good color separation can be created without color mixing. Since ultraviolet light of high intensity is emitted by using the electrodeless light source 44, the photosensitive material 16 is irradiated with ultraviolet light of appropriate intensity. Therefore, the exposure of the photosensitive material can be completed in a short time without increasing the exposure time.

In this embodiment, if the temperature T of the interference filter 57 inserted on the optical path exceeds the predetermined value T0, the control device 42 controls the electrodeless light source 4.
4 is automatically prohibited from lighting, and the lamp 60 is made to blink.Instead, if the temperature T of the interference filter 57 inserted on the optical path exceeds a predetermined value T0, the lamp 60 is turned on and off. 60 is controlled to perform only a blinking operation, and the lamp 6
By blinking 0, it may be possible to warn the operator of the temperature rise of the interference filter and to force the operator to stop the exposure work. Also,
In this embodiment, a temperature sensor 58 is attached to each interference filter 56, but instead of this, a temperature sensor is placed near the insertion position of the interference filter 56 on the optical path to measure the atmospheric temperature at that part. This may be used as a substitute for the temperature of the interference filter 56.

Further, among the light emitted from the electrodeless light source 44, only the light that enters the louver 64 at an incident angle within a predetermined range passes through the louver 64. That is, only the direct light emitted from the light emitting point 48 and the light reflected by the reflection plate 46 and incident on the louver 64 from substantially the same direction as the direct light among the reflected lights pass through the louver 64. Therefore, the angle of incidence of the incident light on the interference filter 56 can be limited, thereby improving the quality of the image.

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

As shown in FIG. 7, the electrodeless light source 144 includes a substantially hemispherical reflecting plate 146.
The approximate center of 46 is the light emitting point 148 of the electrodeless light source 144. Therefore, the reflected light reflected by the reflection plate 146 is returned to the light emitting point 148, and the interference filter 56 has the following effects:
Only the light from the light emitting point 148 of the electrodeless light source 144 is incident at an incident angle within a predetermined range. Therefore, the interference filter 56
The angle of incidence of the incident light on the image can be limited, thereby improving the quality of the image.

[0057]

Since the present invention has the above structure, it is possible to obtain the excellent effect that the angle of incidence of the incident light on the interference filter can be limited and the quality of the image can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a plate inspection production apparatus according to a first embodiment of the present invention, as seen diagonally from the front.

FIG. 2 is a side cross-sectional view showing the top cover of the plate inspection device according to the first embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view showing the exposure section of the plate inspection device according to the first embodiment of the present invention.

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

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

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

FIG. 7 is a schematic cross-sectional view showing an exposure section of an ultraviolet light inspection plate production apparatus 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 Electrodeless light source (light source) 48 Interference filter unit 56 Interference filter 64 Louver (light selective transmission means) 144
Electrodeless light source (light source) 146 Reflector plate 148 Light emitting point

Claims (2)

[Claims] 1. A light source for irradiating ultraviolet light onto an ultraviolet-sensitive photosensitive material that forms a color image by irradiating light in the ultraviolet wavelength range and heating it, the ultraviolet light from the light source being used to generate a color image on an image document. An inspection plate making device that creates an inspection plate by irradiating light onto the photosensitive material through a light source, an interference filter disposed between the light source and the image original, and an interference filter disposed between the interference filter and the light source. 1. A plate inspection plate making device comprising: a light selective transmission means for passing only light incident at a predetermined incident angle within a predetermined range. 2. A light source for irradiating ultraviolet light onto an ultraviolet-sensitive photosensitive material that develops visible color by irradiating it with light in the ultraviolet wavelength range and heating it, and transmitting the ultraviolet light from the light source through an image original. The inspection plate making apparatus creates an inspection plate by irradiating the photosensitive material with light, the apparatus including an interference filter disposed between the light source and the image original, and a substantially hemispherical reflecting plate for connecting the light source to the image document. An inspection plate making device comprising an electrodeless light source with a light emitting point placed approximately at the center of the reflecting plate.