JP2000010209A - Light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device in which the loss of the quantity of light emitted from a light source is minimized and an object to be illuminated is irradiated with the light without an irregularity in light quantity regardless of the type of the object to be illuminated. SOLUTION: A first and a second fly-eye lenses 5A and 5B for eliminating the irregularity in a light quantity and a condenser lens unit 2 condensing the light on a negative film 8 are arranged on an optical path between a halogen lamp 9 and the film 8. The unit 2 is made attachable and detachable and exchanged according to the size of the film 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source device provided in a photographic processing device such as a photographic processing device or a photographic printer, for irradiating a negative film with light from a light source when performing scanning or printing. It is.

[0002]

2. Description of the Related Art Various light source devices have been proposed for irradiating a negative film with light from a light source when scanning a photographic film or printing a photosensitive material such as photographic printing paper.

FIG. 3 is a schematic diagram showing an example of the configuration of a conventional light source device. This conventional light source device includes a light source 31, a dimming filter 32, a condenser lens 33, and a mirror tunnel.

The light source 31 includes a halogen lamp and a reflector, and a part of the light emitted from the halogen lamp is reflected by the reflector to irradiate the light in a substantially constant direction (the direction of the light control filter 32). Is done. The dimming filter 32 includes filters corresponding to each color of red, green, and blue, and has a function of adjusting the hue of incident light. The condenser lens 33 has a function of condensing the incident light in an incident area of the mirror tunnel 34.

[0005] The mirror tunnel 34 includes a cylindrical portion having a light reflecting surface formed on an inner peripheral surface thereof, and diffusion plates provided on the light incident side and the light emitting side of the cylindrical portion.
The diffusion plate is made of, for example, ground glass or PMMA (Poly-methy
l methacrylate (methacrylic resin) and a resin containing milky white pigment.

The operation of the conventional light source device having such a configuration at the time of light emission is as follows. The light emitted from the light source 31 is transmitted through the light control filter 32, the hue thereof is adjusted, and the light enters the condenser lens 33. The light emitted from the condenser lens 33 is diffused by the diffusion plate on the light incident side of the mirror tunnel 34 and enters the mirror tunnel 34. Then, the entered light is reflected and diffused by the light reflecting surface inside the mirror tunnel 34, is diffused again by the diffusion plate on the light exit side of the mirror tunnel 34, and reaches the negative film 35.

[0007]

In the light source device having the above-described structure, in order to cope with various types of negative films having different sizes, the size and performance of the mirror tunnel 34 and the condenser lens 33 are set to the largest size. The setting was made in accordance with a negative film, for example, a negative film of 2B (6 × 9) size. That is, in order to illuminate a wide area, the mirror tunnel 34 has a large opening and has a high diffusion effect. For the same reason, it is necessary to use a condenser lens having a large effective diameter.

With such a configuration, the mirror tunnel 3
4 and the condenser lens 33, and the size of the light source device itself also increases.

Further, a mirror tunnel 34 having a high diffusion effect.
Of the light emitted from the halogen lamp, the amount of light applied to the region other than on the negative film 35 increases, and accordingly, the amount of light on the negative film 35 decreases. Problems had arisen.
Therefore, it is necessary to lengthen the exposure time of the negative film 35, thereby reducing the processing capability of the apparatus or increasing the output of the halogen lamp in the light source 31 in order to increase the amount of light. There have been problems such as an increase in the power consumption of the halogen lamp and an increase in the cost of the halogen lamp itself.

Further, as described above, the mirror tunnel 3
4 and the size and performance of the condenser lens 33,
Since the setting is made in accordance with the largest size negative film, when exposing a small size negative film, a large amount of light is applied to an area other than the area required for exposure of the negative film 35. I was That is, the efficiency of using the light emitted from the light source 31 is low, and the halogen lamp consumes more power than necessary.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to minimize the loss of light quantity of light emitted from a light source regardless of the type of an object to be illuminated, and to reduce the light quantity. It is an object of the present invention to provide a light source device capable of irradiating an illumination target with uniform light.

[0012]

According to a first aspect of the present invention, there is provided a light source device comprising: a light source; a light uniforming unit configured to equalize light emitted from the light source; Light collecting means for collecting the light uniformized by the means,
And a detachable means for detachably attaching the light-collecting means, wherein the light-collecting means is used by being selected from different types of light-collecting means according to an illumination target.

According to the above arrangement, the light uniformized by the light homogenizing means is condensed by the light condensing means and irradiated to the illumination target, so that the light is irradiated only to the area requiring illumination. Can be. Therefore, as in the case of irradiating the light to be illuminated with the light diffused by the diffusion plate in the related art,
Since light is not diffused to unnecessary regions, the illumination target can be efficiently illuminated.

Further, since the above-mentioned light-collecting means is detachable and different kinds of light-collecting means are used in accordance with an object to be illuminated, a large amount of light is applied to an area other than an area requiring illumination. Will not be done. That is, even if the illumination target is different, the light emitted from the light source can be efficiently radiated to the illumination target.

In addition, since the light emitted from the light source is condensed by the light condensing means after the light quantity unevenness is removed by the light uniforming means, the light quantity unevenness of the light applied to the illumination object is efficiently removed. Can be. More specifically, for example, in a configuration in which the light emitted from the light source is condensed by the light condensing means and then incident on the light uniformizing means, the light that is condensed and the cross-sectional area of the light beam is reduced is light uniformized. Will be incident on the means. In this case, light passes through only a part of the light homogenizing means, and the light is homogenized, so that the efficiency of homogenization deteriorates. On the other hand, according to the above configuration, the light emitted from the light source is incident on almost the entire surface of the light homogenizing means, and thereafter is condensed by the light condensing means, so that the light can be efficiently uniformized. .

Therefore, according to the above configuration, even if the illumination target is different, the loss of the light quantity of the light emitted from the light source can be minimized, and the illumination target can be irradiated with the light having the uniform light quantity. Thus, it is possible to provide a light source device capable of maximizing the capability of the light source.

According to a second aspect of the present invention, in the light source device according to the first aspect, the light collecting means is selected from a plurality of light collecting means corresponding to each size of a negative film to be illuminated. It is characterized by being able to.

According to the above configuration, when a negative film is used as an object to be illuminated, light condensing means corresponding to each size of the negative film is used, so that the light emitted from the light source can be used regardless of the size of the negative film. The light loss can be minimized, and light having no light amount unevenness can be applied to the negative film. Therefore, for example, it is possible to provide a light source device that can favorably perform exposure of photographic paper and image detection by a CCD.

According to a third aspect of the present invention, in the light source device according to the first or second aspect, the attaching / detaching means is a magnet for fixing the light collecting means at a predetermined position by a magnetic force.

According to the above arrangement, since the light-collecting means is fixed at a predetermined position by the magnetic force of the magnet, the light-collecting means can be easily and accurately attached and detached. Therefore, it is possible to easily exchange the light collecting means without requiring complicated operations.

[0021]

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

As shown in FIG. 1, the light source device according to the present embodiment has a housing 1 as a lamp box and a detachable condenser lens unit 2 (condensing means). In the housing 1, a light source unit 3, a filter unit 4, first and second fly-eye lenses (light uniformizing means) 5A
5B, a cold mirror 6, and a cooling fan unit 7 are provided. The filter unit 4, the first and second fly-eye lenses 5A and 5B, the cold mirror 6, and the condenser lens unit 2 include a light source unit 3
And a negative film 8 conveyed to a predetermined position outside the light source device, and are provided in this order along an emission direction of light from the light source unit 3 on an optical axis.

The light source device according to the present embodiment is used as a light source device for irradiating the negative film 8 with light and detecting an original image recorded on the negative film 8 by a CCD. The present invention can also be applied to a light source device for printing on photographic paper as a photosensitive material.

The light source unit 3 includes a halogen lamp (light source) 9
, A heat sink 10 and a reflector 11.

As the halogen lamp 9, it is preferable to use a halogen lamp having a single filament serving as a light emitting portion and having a longitudinal direction parallel to the light emitting direction. This is because the halogen lamp 9 having such a structure emits light closest to an ideal point light source when viewed from the direction of the negative film 8,
This is because unevenness in the amount of light on the negative film 8 can be minimized. However, the present invention is not limited to the halogen lamp 9 having such a configuration. For example, the halogen lamp 9 includes one filament serving as a light emitting unit, and its longitudinal direction is perpendicular to the light emission direction. It is also possible to use one having two filaments, the longitudinal direction of each filament being parallel to the light emission direction.

The heat sink 10 supplies both power to the halogen lamp 9 and functions as a socket for fixing the halogen lamp 9 at a predetermined position and also as a heat sink for absorbing and releasing heat generated by the halogen lamp 9. have.

The reflector 11 is provided in a concave shape around the halogen lamp 2 so that the light emitted from the halogen lamp 9 can be reflected and irradiated forward (toward the filter unit 4) and collected. Have been. The curvature of the reflecting surface of the halogen lamp 9 is designed so that the reflected light is applied to almost the entire area of a first fly-eye lens 5A described later.

The reflector 11 is made of a metal material such as aluminum, and has a plurality of fins for heat radiation on an outer surface opposite to a light reflection surface. Therefore, the reflector 11 has an excellent function of absorbing and emitting the heat generated by the halogen lamp 9.

The material constituting the reflector 11 is not limited to the above-mentioned one. For example, a structure in which a dichroic mirror formed of a glass member and having a function of reflecting visible light on a reflection surface is formed. It is also possible to use However, when the reflector 11 made of a glass material is compared with the reflector 11 made of a metal material as in the present embodiment, the reflector 11 made of a metal material has more stable reflection characteristics. And it is inexpensive and has a long life.

The reflector 11 and the heat sink 10
Is directly fixed by screwing or sandwiching by spring steel, so that the relationship between the light emitting position of the filament in the halogen lamp 9 and the curvature of the concave surface of the reflector 11 can be set with high accuracy. Also, at the time of assembling or replacing, it is possible to easily determine a delicate arrangement relationship between the halogen lamp 9 and the reflector 11. Further, since the heat absorbed by the heat sink 10 can easily move to the reflector 11 having a high heat radiation effect, the halogen lamp 9
Can be cooled more efficiently.

It is also possible to adopt a structure in which a heat ray absorbing film having a function of absorbing infrared rays is deposited on the reflecting surface of the reflector 11, and in this case, the infrared component of the light reflected by the reflector 11 is reduced. be able to.

The filter unit 4 includes a heat ray reflection filter 12 and first, second, and third rotating plates ASSY 13.
14 and 15, a negative burn prevention solenoid 16, and a shutter 17.

The heat ray reflection filter 12 has a function of reflecting infrared rays and transmitting visible rays. Here, light having a wavelength of 780 nm or more is reflected,
A heat ray reflection filter 12 having a function of transmitting light having a wavelength of less than nm is used.

First, second and third rotating plates ASSY1
Reference numerals 3, 14, and 15 control light emitted from the halogen lamp 9.

The first rotating plate ASSY13 has a disc-shaped frame, and is divided into four regions radially from the center thereof.
Three types of magenta filters and openings are respectively provided in a circular shape. These three types of magenta filters have a function of cutting a green component (hereinafter, referred to as G light) of incident light, and the ratio of cutting the G light is increased by about several tens of percent.

A stepping motor is provided so as to be in contact with the outer periphery of the frame, and the frame can be rotated by driving the stepping motor. By rotating the frame in this manner, the light emitted from the halogen lamp 9 is transmitted to one of the three types of magenta filters and the opening.
One through.

The second rotating plate ASSY14 is provided with the first rotating plate ASSY14.
It has substantially the same configuration as the rotating plate ASSY13, and has a function of cutting a red component (hereinafter, referred to as R light) of incident light instead of the magenta filter.
Different types of cyan filters are provided.

The third rotating plate ASSY15 is also the same as the above-described first rotating plate ASSY15.
The structure is substantially the same as that of the rotating plate ASSY13, and a positive filter, a negative filter, a setup filter, and an ND filter are provided instead of the magenta filter. Note that the setup filter and the ND filter are arranged so as to overlap in the same region in the third rotating plate ASSY13.

The positive filter outputs 64 out of the incident light.
It has a function of cutting 65% of light having a wavelength of 0 nm or more,
The negative filter has 600 to 680 n of the incident light.
It has a function of cutting light having a wavelength in the range of m by 65%. Also, ND superimposed on the setup filter
The filter has a function of cutting the total light amount of the incident light by 50%, and the setup filter has a function of selecting a wavelength band of light to be used as reference light. This setup filter is used when the halogen lamp 9 is replaced.

The negative burn prevention solenoid 16 and the shutter 17 are configured such that the shutter 17 is moved from the halogen lamp 9 by driving the negative burn prevention solenoid 17 except when the negative film 8 is actually exposed. It is designed to be inserted on the optical path of. This is to prevent the negative film 8 from moving out of the exposure position due to a malfunction of the apparatus, and to prevent the negative film 8 from being continuously irradiated with the light from the halogen lamp 9 and causing the negative film 8 to be discolored due to a rise in temperature. belongs to.

First and second fly-eye lenses 5A and 5A
B has a structure in which a transparent substrate and a large number of microlenses are integrally formed, and does not contain a milky white pigment or the like, so that B is colorless and transparent. The microlenses are all formed in the same shape, and are two-dimensionally and regularly arranged on the surface of the transparent substrate in consideration of the focus of each microlens. At this time, each micro lens in the first fly-eye lens 5A is arranged so as to guide the incident light into the area of the second fly-eye lens 5B, and each micro lens in the second fly-eye lens 5B controls the incident light. The first condenser lens 20 is disposed so as to be guided into the area.

The light incident on the first and second fly-eye lenses 5A and 5B having such a configuration is refracted and diffused on the surface having the uneven shape. It can be said that the light incident on 5A and 5B is split by a large number of microlenses. Therefore, the first and second fly-eye lenses 5
A.5B has a function equivalent to a surface light source due to the action of the microlens. Since the first and second fly-eye lenses 5A and 5B are both composed of a transparent transparent substrate and a micro lens, the transmittance is 9%.
0% or more is realized, and the degree of dimming of light emitted from the light source is suppressed to a low level. As described above, the first and second fly-eye lenses 5A and 5B can uniformly diffuse the incident light and minimize the decrease in the amount of light.

The first fly-eye lens 5A having the above structure is disposed on the light emitting side of the filter unit 4, and the second fly-eye lens 5B is provided with the first fly-eye lens 5A, the cold mirror 6, It is located between. In this manner, by arranging the two first and second fly-eye lenses 5A and 5B continuously in the optical axis direction, it is possible to reliably remove the unevenness in the light amount of the light emitted from the halogen lamp 9. it can.

The first and second fly-eye lenses 5
It is also possible to adopt a configuration in which a heat ray reflective coating is deposited on the surface of A.5B. In such a configuration, the arrival of heat rays to the negative film 8 is further suppressed, and the temperature rise on the negative surface is reduced. It can be further suppressed.

The cold mirror 6 transmits infrared light and reflects only visible light toward the negative film 8. In the present embodiment, 400 to 780n
A cold mirror 6 that reflects only visible light having a wavelength of m is used. Such a cold mirror 6 has a higher efficiency of removing infrared rays than the heat ray reflection filter 12, for example. As described above, the light emitted from the halogen lamp 9 has its infrared component removed by the heat ray reflection filter 12 and the cold mirror 6, so that the temperature rise of the negative film 8 can be sufficiently suppressed.

An anti-reflection plate 18 is disposed on the back side of the cold mirror 6, that is, on the side opposite to the reflection surface of the cold mirror 6. The surface of the antireflection plate 18 on the side of the cold mirror 6 is subjected to a honing treatment, and further to a black alumite (anodic oxide film) treatment. This prevents the infrared light transmitted through the cold mirror 6 from being reflected toward the negative film 8. The anti-reflection plate 18 also has a function of preventing infrared rays transmitted through the cold mirror 6 from reaching the housing 1 and causing a temperature of a part of the housing 1 to which a user may touch extremely rise. ing.

The housing 1 is provided with an opening through which the light from the cold mirror 6 to the negative film 8 passes, and the condenser lens unit 2 is detachably installed outside the opening. Have been.

The condenser lens unit 2 includes a lens plate 19 and first and second condenser lenses 20.
21, a diffusion plate 22, and first and second lens holders 23 and 24.

The lens plate 19 is arranged so as to be in contact with the opening in the housing 1 when the condenser lens unit 2 is mounted on the housing 1 (hereinafter referred to as the mounted state). 2 is a plan view showing a cross section AA in FIG. 1, that is, an upper surface of the lens plate 19. As shown in FIG. 2, the lens plate 19 is provided with an opening 19H and a handle 19G.

The opening 19H is formed in a substantially square shape, and its center is substantially coincident with the optical axis of light emitted from the cold mirror 6 to the negative film 8 in the mounted state. A portion 19H is provided.
The handle portion 19G is provided at a position protruding outside the side surface of the housing 1 in the attached state. The user attaches and detaches the condenser lens unit 2 by gripping the handle 19G.

A first lens holder 23 is provided below the lens plate 19. The upper half of FIG. 2 is a plan view showing the cross section BB in FIG. 1, that is, the upper surface of the first lens holder. The first lens holder 23 has a cylindrical shape, and has a substantially square cross section as shown in FIG. In addition, the first lens holder 23 is arranged such that the center axis thereof substantially coincides with the optical axis of light emitted from the cold mirror 6 to the negative film 8 in the mounted state.

The first condenser lens 20 is disposed at the uppermost position on the inner periphery of the first lens holder 23. The first condenser lens 20 is formed in a substantially square shape along the inner peripheral surface of the first lens holder 23, and is made of spring steel provided on the inner peripheral side of the first lens holder 23. It is held by the lens holder 23H.

The lower part of the first lens holder 23 has a second
A lens holder 24 is provided. The second lens holder 24 has a cylindrical shape, like the first lens holder 23, and has a substantially square cross section. The second lens holder 24 is arranged such that the central axis thereof substantially coincides with the optical axis of light emitted from the cold mirror 6 to the negative film 8 in the mounted state.

The second condenser lens 21 is disposed at the uppermost position on the inner periphery of the second lens holder 24. Like the first condenser lens 20, the second condenser lens 21 is formed in a substantially square shape along the inner peripheral surface of the second lens holder 24.
It is held by a lens holder (not shown) made of spring steel provided on the inner peripheral side of the second lens holder 24.

The diffusion plate 22 is disposed at the lowermost position on the inner periphery of the second lens holder 24. The diffusion plate 22 is made of ground glass, and is arranged to make small scratches on the negative film 8 inconspicuous. The dimming rate by the diffusion plate 22 is about 5 to 10%, and the degree of decrease in the amount of light when light passes through the diffusion plate 22 is slight.

The left and right ends of the lens plate 19 as viewed from the handle 19G are guided by guides (not shown) formed in the housing 1. The condenser lens unit 2 is movable back and forth (left and right in FIG. 1) when viewed from the handle portion 19G side according to the guide on the lens plate 19, whereby the condenser lens unit 2 is It can be removed from.

Further, a magnet 25 is provided at a position facing the first lens holder 23 in the housing 1, and in a mounted state, the magnet 25 and the first lens holder 23 are bonded by magnetic force. In other words, the condenser lens unit 2 can be attached to and detached from the housing 1 by moving to the left and right in FIG. 1. In the attached state, the magnet 25 and the first lens holder 23 are bonded by magnetic force. Is fixed by Therefore, the user can easily replace the capacitor unit 2 and perform accurate positioning in the mounted state.

In the present embodiment, the condenser lens unit 2 is detachable from the housing 1 by the above-described configuration. However, the present invention is not limited to such a configuration. Any configuration may be used as long as the configuration allows easy attachment and detachment of the condenser lens unit 2 and accurate positioning of the condenser lens unit 2 in the mounted state.

In the present embodiment, in the condenser lens unit 2 having the above-described structure, two types of composite lenses including the first and second condenser lenses 20 and 21 having different focal lengths are prepared. One condenser lens unit 2 has a film size of 110, 1
The other condenser lens unit 2 is used when illuminating the negative film 8 of 26, 135F, 135H.
Means 6 × 4.5, 6 × 6, 6 with a film size of 2B
It is used when illuminating a negative film 8 of × 7, 6 × 8, 6 × 9.

The types of the condenser lens units 2 are not limited to the two types as described above, but three or more types of the condenser lens units 2 are prepared according to the size of the film, and are appropriately replaced. It is also possible to use.

A cooling fan unit 7 is provided near the back of the light source unit 3 in the housing 1. The cooling fan unit 7 introduces air outside the housing 1 into the housing 1, thereby suppressing a rise in temperature inside the housing 1 due to heat generated from the halogen lamp 9.

Next, the path of the light emitted from the halogen lamp 9 in the light source device will be described.

Light emitted from the halogen lamp 9 at a solid angle of 360 ° is reflected forward by the reflector 11 and enters the filter unit 4. In the filter unit 4, while the infrared rays are partially removed by the heat ray reflection filter 12, visible light passes through the heat ray reflection filter 12, and the first, second, and third rotating plates ASSY13, 14,.
15, the color balance is adjusted.

Here, the first, second and third rotating plates A
The operation when dimming the light emitted from the halogen lamp 9 by the SSY 13, 14, and 15 will be described in detail.

As described above, the light source device of this embodiment irradiates the negative film 8 with light,
Is used as a light source device for detecting an original image recorded in a CCD by a CCD. Therefore,
The dimming is performed based on the sensor output of the CCD.

The light sensor of the CCD generally has low sensitivity to blue component light (hereinafter referred to as B light). Therefore, light control is performed by cutting the R light with any of the above three types of magenta filters and cutting the G light with any of the above three types of cyan filters with reference to the B light. When the B light is higher than the reference, a stop is provided between the light source device and the CCD, the overall light amount is reduced by the stop, and the light control is performed as described above. The dimming method is performed by lowering the voltage of the lamp or inserting an ND filter in the optical path.

If the negative film 8 is a normal negative film, there is almost no need to perform the light control as described above because the color balance is hardly lost. In order to cope with a negative film having a disturbed color balance, the above-described light control is performed.

In the above description, the configuration in which the original image recorded on the negative film 8 is detected by the CCD has been described. However, the type of the image detected by the CCD is not limited to the negative film. It is also possible to detect by CCD. In this case, since the red wavelength range is different between the positive film and the negative film,
It is necessary to adjust the red component so as to have a wavelength range corresponding to each. Therefore, when a positive film is used, the above-mentioned positive filter is used, and when a negative film is used, light is adjusted using the above-mentioned negative filter.

The first, second and third rotating plates AS
Slits are formed in the flange portions of the frames in SY13, SY14, SY15, and by detecting the slits, the sensor detects the orientation of each frame, that is, the area in each frame. It is detected whether or not it is located in the area where the light from the halogen lamp 9 passes.

The light control described above is performed, and the light emitted from the filter unit 4 is transmitted to the first fly-eye lens 5.
A, and through the second fly-eye lens 5B, the light becomes uniform and uniform, and the cold mirror 6
Is reflected in the negative film 8 direction. Note that a part of the infrared light that has reached the cold mirror 6 passes through the cold mirror 6 and deviates from the optical path.

The light reflected by the cold mirror 6 enters the condenser lens unit 2. The light incident on the condenser lens unit 2 is collected by passing through the first condenser lens 20 and the second condenser lens 21. The condensed light passes through the diffusion plate 22 and irradiates the negative film 8.

As described above, in the light source device of the present embodiment, the condenser lens unit 2 is detachable, and an appropriate one of the two types of condenser lens units 2 is used according to the size of the negative film 8. Therefore, a large amount of light does not irradiate a region other than a region requiring illumination. That is, even if the size of the negative film 8 is different, the light emitted from the halogen lamp 9 can be efficiently radiated to the required area of the negative film 8 for illumination.

Further, a first micro lens having a plurality of microlenses formed on the surface of a transparent substrate so that incident light can be guided into the incident side region of the condenser lens unit 2.
Since the first and second fly-eye lenses 5A and 5B are provided with the second fly-eye lenses 5A and 5B, most of the light from which the light amount unevenness has been removed by the first and second fly-eye lenses 5A and 5B enters the condenser lens unit 2. Therefore, unlike a diffusion plate using a ground glass or a resin containing a milky white pigment, which is conventionally used, light is not diffused to unnecessary regions. Light amount loss can be greatly reduced.

The first and second fly-eye lenses 5
The light uniformed by A.5B is condensed by the first and second condenser lenses 20 and 21 and illuminated on the negative film 8, so that it is possible to illuminate only the area requiring illumination. Therefore, unlike the conventional case where the light diffused by the diffusion plate is irradiated on the illumination target, the light is not diffused to unnecessary regions, and the negative film 8 can be efficiently illuminated. it can.

The light emitted from the halogen lamp 9 is
Since the light is made uniform using substantially the entire surface of the first and second fly-eye lenses 5A and 5B and then condensed by the first and second condenser lenses 20 and 21, light can be made uniform efficiently. it can.

The light source device according to the present embodiment is used in a configuration in which an original image recorded on the negative film 8 is detected by a CCD. However, as described above, photographic paper as a photosensitive material is used. It can also be used as a light source device for printing on a substrate. In this case, since it is necessary to delicately control the color, the conventionally used dimming unit can be used without using the first, second, and third rotating plates ASSY13, 14, and 15 as described above. Must be used.

In this conventional dimming unit, dimming is performed by inserting filters corresponding to each color into the optical path from two directions and changing the opening areas of these filters. However, in the dimming by the dimming unit having the configuration in which the opening area is changed as described above, since color unevenness is easily generated, it is necessary to adopt a configuration in which the diffusion effect is higher than that of the light source device described above. Specifically, for example, if another fly-eye lens is provided in addition to the first and second fly-eye lenses 5A and 5B, the light diffusion effect can be improved.

[0078]

As described above, in the light source device according to the first aspect of the present invention, the light source, the light equalizing means for equalizing the light emitted from the light source, and the light equalizing means are made uniform by the light equalizing means. Light collecting means for collecting light, and attaching and detaching means for detachably attaching the light collecting means, wherein the light collecting means is selected from different types of light collecting means according to an illumination target and used. Configuration.

As a result, the light is not diffused to unnecessary areas, so that the illumination target can be efficiently illuminated.

Further, even if the illumination target is different, there is an effect that the light emitted from the light source can be efficiently applied to the illumination target.

Further, the light emitted from the light source is incident on almost the entire surface of the light uniformizing means, and thereafter is condensed by the light condensing means, so that there is an effect that the light can be efficiently uniformized. .

That is, even if the objects to be illuminated are different, the loss of the light amount of the light emitted from the light source can be minimized and the light having no unevenness in the amount of light can be applied to the illuminated object. There is an effect that a light source device that can be extracted can be provided.

A light source device according to a second aspect of the present invention is configured such that the light condensing means is used by being selected from a plurality of light condensing means corresponding to each size of a negative film to be illuminated.

Thus, in addition to the effect of the structure of claim 1, the loss of the light amount of the light emitted from the light source is minimized regardless of the size of the negative film, and the light without uneven light amount is transmitted to the negative film. Since irradiation can be performed, for example, there is an effect that it is possible to provide a light source device that can favorably perform exposure of photographic paper and image detection by a CCD.

The light source device according to the third aspect of the present invention is configured such that the attaching / detaching means is a magnet for fixing the light collecting means at a predetermined position by a magnetic force.

Thus, in addition to the effects of the first and second aspects, the attachment and detachment of the light condensing means can be performed easily and accurately, so that complicated operations are not required.
There is an effect that the light condensing means can be easily replaced.

[Brief description of the drawings]

FIG. 1 is a side view showing a schematic configuration of a light source device according to an embodiment of the present invention.

FIG. 2 is an upper surface of a lens plate in the light source device;
FIG. 3 is a plan view showing an upper surface of a first lens holder.

FIG. 3 is a side view showing a schematic configuration of a conventional light source device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Housing 2 Condenser lens unit (condensing means) 3 Light source part 4 Filter unit 5A / 5B 1st, 2nd fly-eye lens (light equalizing means) 6 Cold mirror 7 Cooling fan unit 8 Negative film 9 Halogen lamp (light source) DESCRIPTION OF SYMBOLS 10 Heat sink 11 Reflector 12 Heat ray reflection filter 13 ・ 14 ・ 15 First, second, third rotating plate ASSY 19 Lens plate 20 ・ 21 First, second condenser lens 23 ・ 24 First, second lens holder 25 Magnet

Claims (3)

[Claims] A light source; a light homogenizing means for homogenizing light emitted from the light source; a light condensing means for condensing the light homogenized by the light homogenizing means; A light source device, wherein the light collecting device is selected from different types of light collecting devices according to an illumination target. 2. The light source device according to claim 1, wherein said light collecting means is selected from a plurality of light collecting means corresponding to each size of a negative film to be illuminated. 3. The light source device according to claim 1, wherein said attaching / detaching means is a magnet for fixing said condensing means at a predetermined position by a magnetic force.