JPH11352607A - Light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device capable of making the loss of the quantity of light emitted from a light source to the minimum and irradiating an illuminated object with the light having no irregularity in light quantity. SOLUTION: 1st and 2nd fly-eye lenses 5A and 5B and 1st and 2nd condenser lenses 20 and 21 are arranged on an optical path between a halogen lamp 9 and a negative film 8. The light emitted from the lamp 9 is condensed by the 1st and the 2nd condenser lenses 20 and 21 after removing the irregularity in the light quantity by the 1st and the 2nd fly-eye lenses 5A and 5B and then, is irradiated to an original image on the negative 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. As a light source in such a light source device, a halogen lamp is generally used.

[0003] Light emitted from a halogen lamp has uneven light intensity due to the influence of the shape of the filament, the reflection plate, and the like. On the other hand, in the case of a negative film, it is necessary to uniformly irradiate the entire image area of the negative film. Therefore, in the light source device described above, a configuration for equalizing the light from the halogen lamp between the halogen lamp and the negative film is essential.

As a configuration for making the light from the halogen lamp uniform, for example, a configuration in which a condensing lens and a light diffusing means are arranged in this order from the halogen lamp side between the halogen lamp and the negative film is used. ing. According to this configuration, the light emitted from the halogen lamp is condensed by the condensing lens, and the condensed light is diffused by the light diffusing means, so that the negative film is irradiated as uniform light.

As the light diffusing means, for example, a mirror tunnel 51 as shown in FIG. 4 is used. The mirror tunnel 51 has a cylindrical mirror tunnel main body 53 having a light reflecting surface 52 formed on an inner peripheral surface thereof. Plates 54 and 55 are provided. The diffusion plates 54 and 55 are made of, for example, ground glass or PMM.
It is composed of a resin such as A (methacrylic resin) containing a milky white pigment.

[0006] With such a configuration, the light from the light source is
The light is diffused by the diffusion plate 54 on the light incident side of the mirror tunnel 51 and enters the mirror tunnel 51. Then, the entered light is reflected and diffused by the light reflecting surface 52 inside the mirror tunnel 51, is again diffused by the diffusion plate 55 on the light exit side of the mirror tunnel 51, and reaches the negative film.

That is, by irradiating the diffused light to the negative film using the mirror tunnel 51, the negative film can be exposed substantially uniformly even when a light source such as a halogen lamp is used.

[0008]

However, the diffusion plate 54
Is made of ground glass or milky white material, as described above, the amount of light decreases about 1/10 when the light from the light source passes through the diffusion plate 54, and the same light amount A drop occurs.

On the other hand, when the light source device configured as described above is used for a scanner, for example, light illuminating the negative film is detected by a CCD (Charge-Coupled Device). The CCD can obtain a high-contrast image when the amount of light of the received image is widely distributed between the upper limit and the lower limit of the light amount sensor. That is, the light illuminating the negative film needs to have a certain amount of light.

Therefore, in the configuration of the conventional photographic processing apparatus, the power of the halogen lamp must be increased in order to compensate for the decrease in the amount of light caused by the light from the light source passing through the two diffusion plates 54 and 55. Was corresponding. As a result, the power consumption of the halogen lamp increases,
There have been problems such as an increase in cost of the halogen lamp itself.

As described above, when the power of the halogen lamp is increased, the amount of heat released from the halogen lamp also increases. In this case, it is necessary to increase the cooling capacity of a configuration for cooling the inside of the light source device, for example, a configuration of a fan or the like, which leads to a further increase in power consumption.

Further, when the power of the halogen lamp is increased, the illuminance unevenness on the negative film is increased. Therefore, it is necessary to further enhance the light diffusion by the light diffusion means.
For example, in the above case, a method of increasing the thickness of the diffusion plates 54 and 55 of the mirror tunnel 51 to enhance the diffusion effect in the mirror tunnel 51 can be considered. However, the diffusion plate 5
The increase in the thickness of 4.55 further reduces the amount of light, and requires a light source with a higher capacity.

As another method for preventing illuminance unevenness on the negative film, a method of forming the mirror tunnel 51 long in the optical axis direction and increasing the number of reflections inside the mirror tunnel 51 to enhance the diffusion effect is also available. is there. But,
In this method, there is a problem that the size of the mirror tunnel 51 becomes large, and accordingly, the size of the light source device itself becomes large.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to minimize the loss of light amount of light emitted from a light source and to apply light having no light amount unevenness to an object to be illuminated. An object of the present invention is to provide a light source device that can perform irradiation.

[0015]

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 condensing means for condensing the light uniformized by the means, wherein the light uniformizing means has a plurality of light beams on the surface of the transparent substrate so that the incident light can be guided into an incident side region of the light condensing means. Are formed.

According to the above configuration, the light equalizing means has a plurality of microlenses formed on the surface of the transparent substrate so that the incident light can be guided into the incident side region of the light collecting means. Most of the light from which the light amount unevenness has been removed by the light uniforming means enters the light collecting means.
Therefore, unlike a diffusion plate using a resin containing a ground glass or a milky white pigment, which has been conventionally used, light is not diffused to unnecessary regions.
The loss of the amount of light incident on the light uniforming means can be significantly reduced.

Further, the light uniformized by the light homogenizing means is condensed by the light condensing means and illuminated on the object to be illuminated, so that the light can be illuminated only on the area requiring illumination. Therefore, unlike the conventional case where the light diffused by the diffusion plate is radiated to the illumination target, the light is not diffused to unnecessary regions, so that the illumination target can be efficiently illuminated.

Further, 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, so that 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 enters the light uniformizing means, the light that is condensed and the cross-sectional area of the light flux of the light is reduced It will be incident on the uniformizing 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, the loss of the light amount of the light emitted from the light source can be minimized, and the light having no light amount unevenness can be applied to the object to be illuminated. A light source device that can be extracted can be provided.

According to a second aspect of the present invention, in the light source device according to the first aspect, a heat ray reflecting means for reflecting infrared rays and transmitting visible light, and a infrared ray transmitting between the light source and the condensing means. Further, a heat ray transmitting means for reflecting visible light is further arranged, and light transmitted through the heat ray reflecting means and reflected by the heat ray transmitting means is used as illumination light.

According to the above configuration, since the light transmitted through the heat ray reflecting means and reflected by the heat ray transmitting means is used as illumination light, the intensity of the infrared component light included in the light emitted from the light source is large. Parts can be cut. Therefore, the temperature rise of the illumination target can be significantly suppressed.

According to a third aspect of the present invention, in the configuration of the first aspect, the light source device further includes a reflector for reflecting light emitted from the light source in a substantially constant direction, and the light source is directly fixed to the reflector. It is characterized by:

According to the above configuration, since the light source is directly fixed to the reflector, the relationship between the light emitting position of the light source and the curvature of the reflecting surface of the reflector 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 light source and the reflector.

[0024]

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 condenser lens unit 2. In the housing 1, a light source unit 3, a filter unit 4, first and second fly-eye lenses (light uniformizing means) 5A and 5B, a cold mirror (heat ray transmitting means) 6, and a cooling fan unit 7 are provided. Is provided. Filter unit 4, first and second
The fly-eye lenses 5A and 5B, the cold mirror 6, and the condenser lens unit 2 provide light from the light source unit 3 on an optical axis connecting the light source unit 3 and the negative film 8 conveyed to a predetermined position outside the light source device. Are provided in this order along the light emitting direction.

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, for example, a lamp having a shape as shown in FIGS. 2A to 2C can be used. The halogen lamp shown in FIG. 2A has one filament serving as a light emitting part, and its longitudinal direction is perpendicular to the light emitting direction. FIG.
The halogen lamp shown in FIG. 2B has two filaments serving as light emitting portions, and the longitudinal direction of each filament is parallel to the light emission direction. FIG. 2 (c)
Has a single filament serving as a light emitting portion, and its longitudinal direction is parallel to the light emission direction. In the present embodiment, FIG.
The halogen lamp having the shape shown in (c) is most preferable. This is because a halogen lamp having a shape as shown in FIG. 2 emits light closest to an ideal point light source when viewed from the direction of the negative film 8. Is minimized.

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 such 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 radiating the heat generated by the halogen lamp 9.

The material constituting the reflector 11 is not limited to the above-mentioned one, but may be, for example, a glass member having a reflecting surface on which a dichroic mirror having a function of reflecting visible light 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 with 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 reflection 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 (heat ray reflection means) 12, first, second, and third rotating plates ASSY13, 14, and 15, a negative burn prevention solenoid 16, and a shutter 17. I have.

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 details of the first, second, and third rotating plates ASSY13, 14, and 15 will be described later.

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 arranged on the light emitting side of the filter unit 4, and the second fly-eye lens 5B is connected to 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 rays and reflects only visible rays in the direction of 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 arranged 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 arranged so as to be inserted into the opening. ing.

The condenser lens unit 2 has a cylindrical portion 1
9 and first and second condenser lenses (light collecting means) 2
0.21 and a diffusion plate 22. Tubular part 19
Are arranged such that the central axis thereof overlaps with the optical axis irradiated from the cold mirror 6 to the negative film 8, and the first condenser lens 2 is provided in the opening on the cold mirror 6 side.
0, a diffusion plate 22 is disposed in the opening on the negative film side. In addition, the second condenser lens 21 is
Is disposed at a position close to the diffusion plate 22 inside the inside.

As described above, the light reflected by the cold mirror 6 is applied to the two first and second condenser lenses 20.
21 and the collected light is irradiated to the negative film 8, so that light not used for irradiating the light to the negative film 8 can be minimized. Can be irradiated.

The diffusion plate 22 is made of ground glass, and is arranged to make minute 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 cooling fan unit 7 introduces air outside the housing 1 into the housing 1, and thereby suppresses a rise in temperature inside the housing 1 due to heat generated from the halogen lamp 9.

Here, the first, second, and third
FIG. 3A shows the rotating plates ASSY13, 14, and 15.
This will be described with reference to FIGS.

As shown in FIG. 3 (a), the first rotating plate ASSY13 includes a disc-shaped frame 13F, and a first magenta filter (hereinafter, referred to as an M filter) is provided in a region radially divided into four from the center thereof. 13A), a second M filter 13B, a third M filter 13C, and an opening 13H.
Are provided in a circular shape, respectively. Also, frame 1
Stepping motor 13M so as to contact the outer periphery of 3F
The frame 13F can be rotated by driving the stepping motor 13M. By rotating the frame 13F in this way, the light emitted from the halogen lamp 9 is transmitted to the first, second, and third M filters 13A, 13B, and 13M.
C and one of the openings 13H.

First, second, and third M filters 13A and 13
B · 13C has a function of cutting a green component (hereinafter, referred to as G light) of the incident light, and the first M filter 13A
The rate at which the G light is cut increases by approximately several tens of percent in order from.

As shown in FIG. 3B, the second rotating plate ASSY14 has substantially the same configuration as the first rotating plate ASSY13 described above, and includes a frame 14F and a second cyan filter (hereinafter, referred to as a C filter). 14A, a second C filter 14B, a third C filter 14C, an opening 14H,
And a stepping motor 14M.

First, second and third C filters 14A and 14
B · 14C has a function of cutting a red component (hereinafter, referred to as R light) of the incident light, and the first C filter 13A
, The rate at which the R light is cut increases by approximately several tens of percent.

As shown in FIG. 3C, the third rotating plate ASSY15 has substantially the same configuration as the first rotating plate ASSY13 described above, and includes a frame 15F, a positive filter 15P, a negative filter 15N, and a setup filter. 1
5S, an ND filter 15ND, an opening 15H, and a stepping motor 15M. Note that the setup filter 15S and the ND filter 15ND are
In the same area of the rotating plate ASSY13, they are arranged to overlap.

The positive filter 15P has a function of cutting 65% of light having a wavelength of 640 nm or more out of the incident light, and the negative filter 15N has a function of cutting out 6% of the incident light.
It has a function of cutting light having a wavelength in the range of 00 to 680 nm by 65%. Also, the setup filter 15S
The ND filter 15ND superimposed on the ND filter 15ND has a function of cutting the total amount of incident light by 50%, and the setup filter 15S has a function of selecting a wavelength band of light to be used as reference light. I have. This setup filter 15S is used when replacing the halogen lamp 9 or the like.

In FIG. 3C, a circular hole formed on the ND filter 15ND corresponds to the setup filter 15 disposed on the back side of the ND filter 15ND.
S is provided for the sake of convenience in the drawing, and a hole as shown in FIG. 3C is not actually formed on the ND filter 15ND.

Next, the operation of the first, second, and third rotating plates ASSY13, 14, and 15 having the above-described structure for adjusting the light emitted from the halogen lamp 9 will be described.

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, based on the B light, the R light is cut by any of the first, second, and third M filters 13A, 13B, and 13C, and the G light is cut by the first, second, and third C filters 14A. Dimming is performed by cutting with either 14B or 14C. 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 is performed by lowering the voltage of the lamp or inserting the ND filter 15ND 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, since 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, 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 the positive film is used, the above-mentioned positive filter 15P is used, and when the negative film is used, the above-mentioned negative filter 15N is used for light control.

The first, second, and third rotary plates AS
Frames 13F / 14F in SY13 / 14/15
A slit is formed in the flange portion of 15F, and the sensor detects this slit to determine the orientation of each frame 13F, 14F, 15F, that is, each frame 13F, 14F.
It is detected which area in 15F is located in the area where the light from the halogen lamp 9 passes.

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

Light emitted at a solid angle of 360 ° from the halogen lamp 9 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.

The light emitted from the filter unit 4 is
By passing through the first fly-eye lens 5A and the second fly-eye lens 5B, the light becomes even and uniform, and is reflected by the cold mirror 6 in the direction of the negative film 8. 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, the light source device according to the present embodiment has a structure in which a plurality of microlenses are formed on the surface of the transparent substrate so that the 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, 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 light control unit, light control 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.

[0073]

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 condensing means for condensing light, wherein the light uniformizing means has a plurality of microlenses formed on the surface of the transparent substrate so that the incident light can be guided into the incident side region of the light condensing means. It is a configuration consisting of

As a result, since light is not diffused to unnecessary regions, there is an effect that loss of light quantity of light incident on the light uniforming means can be greatly reduced.

The light uniformized by the light homogenizing means is condensed by the light condensing means and illuminated on an object to be illuminated, so that the light can be illuminated only on the area requiring illumination. Play.

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

Therefore, according to the above configuration, the loss of the light amount of the light emitted from the light source can be minimized, and the light having the uniform light amount can be applied to the object to be illuminated. There is an effect that a light source device that can be extracted can be provided.

According to a second aspect of the present invention, there is provided a light source device between the light source and the light condensing means, a heat ray reflecting means for reflecting infrared light and transmitting visible light, and a heat ray reflecting means for transmitting infrared light and reflecting visible light. A heat ray transmitting means is further disposed, and light transmitted through the heat ray reflecting means and reflected by the heat ray transmitting means is used as illumination light.

Thus, in addition to the effect of the configuration of claim 1, most of the infrared component light contained in the light emitted from the light source can be cut off, so that the temperature rise of the illumination target can be largely suppressed. It has the effect of being able to.

A light source device according to a third aspect of the present invention further comprises a reflector made of a metal material for reflecting light emitted from the light source in a substantially constant direction, wherein the light source is directly fixed to the reflector. It is.

Thus, in addition to the effect of the configuration of claim 1, there is an effect that the relationship between the light emitting position of the light source and the curvature of the reflecting surface of the reflector 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 light source and the reflector.

Further, since the heat generated by the light source can be easily transferred to the reflector having a high heat radiation effect, the light source can be efficiently cooled.

[Brief description of the drawings]

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

FIGS. 2A to 2C are schematic diagrams schematically showing the shape of a filament of a halogen lamp.

FIGS. 3A to 3C are a plan view and a side view, respectively, showing a schematic configuration of first, second, and third rotating plates ASSY.

FIG. 4 is a side view showing a schematic configuration of a conventional mirror tunnel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Housing 2 Condenser lens unit 3 Light source part 4 Filter unit 5A / 5B 1st, 2nd fly-eye lens (light equalization means) 6 Cold mirror (heat ray transmission means) 7 Cooling fan unit 8 Negative film 9 Halogen lamp (light source) Reference Signs List 10 heat sink 11 reflector 12 heat ray reflection filter (heat ray reflection means) 13.14.15 first, second, and third rotating plates ASSY 20.21 first and second condenser lenses (light collection means)

Claims (3)

[Claims] A light source; a light equalizing means for equalizing light emitted from the light source; and a light condensing means for condensing the light uniformed by the light uniforming means. The light source device is characterized in that a plurality of microlenses are formed on the surface of the transparent substrate so that the incident light can be guided into the incident side region of the light condensing means. 2. A heat ray reflecting means for reflecting infrared light and transmitting visible light, and a heat ray transmitting means for transmitting infrared light and reflecting visible light, are further provided between the light source and the light condensing means. 2. The light source device according to claim 1, wherein light transmitted through the heat ray reflecting means and reflected by the heat ray transmitting means is used as illumination light. 3. The light source device according to claim 1, further comprising a reflector for reflecting light emitted from said light source in a substantially constant direction, wherein said light source is directly fixed to said reflector.