JP2002328426A - Transmissive material projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bright screen even by the light source lamp of the same electric power by transmitting light in a visible region simultaneously absorbed with heat absorption by eliminating the need of heatproof glass conventionally required because a projecting material is cooled and obtained heat is reduced. SOLUTION: In a projector to project a transmissive material 14 on a screen by using a condensing system 13 to converge a luminous flux emitted by using a lamp with a reflection mirror as a light source 11 on the incident pupil of a projecting lens 15 by changing the direction of an optical axis by a plane reflection mirror 12, both the cooling of the condensing system and the transmissive material and that of the light source 11 are performed by one fan 16 by which intake and exhaust are not coaxially performed by using the intake side of the fan 16 for the cooling of the condensing system and the transmissive material and the exhaust side of it for that of the light source 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source application device for projecting a transparent material.

[0002]

2. Description of the Related Art In a conventional projector, a single lamp is used as a light source, and approximately the center of a spherical reflector is placed on the light source, and the direct light from the lamp and the reflected light from the spherical mirror are projected through a condensing system. In this method, a light beam transmitted through a material is projected by a projection lens, and the optical system is arranged on a straight line.

FIG. 3 shows an arrangement of an optical system of a conventional projector. A part of the light beam emitted from the light source lamp 31 is directly reflected by the spherical reflecting mirror 32 and a part of the light beam enters the condenser system 33, and the light beam converged toward the pupil position of the projection lens 15 passes through the projection document 14. 1 shows an optical system projected on a screen. As a light source, the brightness of a lamp usually requiring several hundred watts is required, but operating conditions have temperature restrictions, and cooling with a fan was performed. The arrows in the figures indicate the airflow caused by the fan. FIGS. 1 and 2 also show the same.

The material to be projected also has a heat resistance limit, and when the luminous flux is concentrated, heat also concentrates there. Therefore, as shown in FIG. 3, in a structure in which the position of the material and the position of the lamp are separated as shown in FIG. It is difficult to cool the projection material at the same time, and a heat-insulating glass 35 is inserted into the condensing system 33 to prevent the projection material from becoming hot due to heat.

In a so-called slide projector using a film with a frame as a transparent material, the material can be exchanged by inserting from the upper part and dropping the lower storage part, by adding a chinger and alternately projecting the left and right, or by setting the frame in advance in the projection order. An automatic exchange method of inserting a film with a cassette into a cassette has been used. Except for the drop type, the protruding additional objects on the left and right sides of the fuselage caused the fuselage to become larger.

[0006] When a transparent material is used as a print original, it is now necessary to transfer the image to an image processing device via a special light source and an image resolving device having a high resolution, and to finish the print original through means such as image correction and color correction. It was up to the method.

[0007]

Since a projector is required to have a large screen illuminance, a lamp used as a light source also consumes a large amount of power, so that cooling below a certain temperature is required as a lamp operating condition, and a normal fan is required. However, the projection materials cannot withstand high temperatures and must be cooled.

[0008] When replacing the film with a frame, the chainer system that slides left and right causes a problem in the stability of the device, and becomes an unstable element of the screen in an extremely small light device. Yes, the hand motion becomes congested in a method in which the projected framed film is dropped to the lower part by inserting the projection material sequentially from the upper part by a simple method.

In the conventional method, when a transparent material is used as a print manuscript, when a scanner is used for performing image processing by a computer, the resolution of a normal scanner does not reach the accuracy with which the transparent material forms an image. Required a high-precision scanner.

[0010]

The problem of light quantity and heat can be sufficiently improved by using a lamp with a reflecting mirror. The reflecting mirror used is substantially a spheroidal surface, and a filament is provided at its focal point. By placing it, the entire light beam is reflected on the elliptical surface and condensed at the other focal point. Here, by treating the elliptical reflecting mirror with a coating that reflects visible light and transmits heat rays, the heat emitted together with the light flux from the light source is reduced by half. Even if the spherical reflecting mirror 32 shown in FIG. 3 is subjected to the heat ray transmission processing, the same effect cannot be expected because a part of the heat directly reaches the light collecting system 33.

In the present invention, the light path is bent by using a lamp with a reflecting mirror, and a system in which the intake and exhaust are not coaxial, such as a sirocco fan, is used to cool the lamp and the transmission material simultaneously with a single fan. That is, the projection material and the light condensing system were cooled on the intake side of the fan, and at the same time, cooling was performed by placing a light source on the exhaust side.

According to the present invention, the method of exchanging the transparent material with the frame by operating the interlocking device provided on the body according to the movement of the frame is such that the transparent material with the frame to be discharged is in the same direction as the transparent material with the frame to be inserted. Thus, there is an advantage that the transmissive material with a frame discharged by the insertion hand can be immediately caught, and the movement of the work can be reduced.

In the past, the number of pixels that revealed the resolution of a digital camera was not high enough, but recently, digital cameras having millions of pixels have become widespread and it is necessary to use a high-definition scanner. It is now possible to easily import images into a computer without any means, and the accuracy is maintained by directly shooting transparent materials instead of using a digital camera to shoot the image enlarged and projected by the transparent material projector. You can import untouched images into your computer.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. Reference numeral 11 in FIG. 1 denotes a light source lamp, which is integrally formed with an elliptical reflecting mirror. After all the light beams emitted from the lamp are reflected by the elliptical reflecting mirror surface, the reflecting mirror 1 is turned on.
2, the light path is bent, and the light is converged toward the entrance pupil of the projection lens 15 by the light condensing system 13, passes through the projection material 14 on the way, and is projected on the screen by the lens 15.

In FIG. 2, after the light beam emitted from the light source lamp 11 is changed its optical path by the plane reflecting mirror 12, the light beam is brought to the pupil position of the projection lens 15 by the condensing system 23 placed before and after the liquid crystal plate 24. The projection material 24 converged in the optical path is projected on the screen. In the embodiment, in order to further remove the heat contained in the light beam from the lamp with the reflecting mirror, the reflecting mirror 12 is subjected to a reflection film treatment for reflecting only visible light.

FIG. 4 shows an outline of a mechanism for exchanging a framed film. The framed film receivers 42 are provided at two symmetrical positions of the closed belt 41, and the framed film placed on the receivers is inserted to a fixed position, and the framed film is fixed to the projection position together with the receivers by the pressure plate 43. Let me do. Further, the belt 41 is turned on when the next framed film is inserted.
Is rotated and the projected framed film is discharged. As a simple type, a shiso type in which frame receiving frames are provided at both ends of an open belt is also conceivable.

FIG. 5 shows an outline in which the additional device according to the present invention is attached to the transmissive material projector of FIG. 1. The originally required transmissive material 14 is moved and installed on the optical axis of the additional device 50. By using the Fresnel mirror 51 as the reflecting mirror for changing the optical axis, the light flux converging at the pupil position of the projection lens is diverged in reverse, so that the illuminance of the screen can be made uniform. A diffuser may be inserted to adjust the illuminance.

FIG. 6 shows the concept of the copying method according to the fourth aspect, that is, the divergent light beam is copied after transmitting the copied transmissive material through the projection lens or convergence at the pupil position after removing the projection lens. Copying is possible by placing the whole or necessary part of the transparent material at a position where it is irradiated.

It is also possible to insert a diffusing plate for uniformizing the screen to be imaged or to correct the amount of light, or use a lens or the like that partially changes the optical path, and insert a reflecting mirror to change the entire optical path. Further, the color temperature of the light source can be arbitrarily changed by inserting a color temperature conversion filter at the film position 14 in FIG. 1, and a lens or the like that converges or diverges various light beams is placed here to converge the light beams. It is also possible to change the position.

[0020]

As the projection material can be cooled and the heat reaching it is reduced, the conventionally required heat insulating glass becomes unnecessary, and the visible light that has been absorbed is transmitted at the same time as the heat absorption, so that even a light source lamp of the same power can be used. It was possible to brighten the screen, and there was about a 10% increase in actual measurements. Further, since the projection material side can be sufficiently cooled, a configuration using a material having low heat resistance other than glass material, which has not been considered as a condensing system, becomes possible.

Conventionally, in the liquid crystal panel projector, the cooling of the light source lamp and the cooling of the liquid crystal panel portion were performed separately. However, in the present invention, both fans can be cooled by one fan as shown in FIG. The cooling part could be expanded without doing.

With respect to the quality of the transmissive material, it is possible to judge whether or not it can be used by performing enlarged projection which is an original function. By adding a part that gives the projector the function of a light source for copying this transparent material, the transparent material that requires image processing is photographed with a high-precision digital camera, image processing is immediately performed by a computer, and output by a color printer. By doing so, test printing can be easily performed.

[Brief description of the drawings]

FIG. 1 shows an example of an arrangement of a transmissive material projector according to the present invention.

FIG. 2 shows an example of an arrangement of a liquid crystal plate projector according to the present invention.

FIG. 3 shows a component arrangement in a conventional projector.

FIG. 4 shows an outline of a mechanism for exchanging a transparent material with a frame.

FIG. 5 shows an outline of an additional apparatus for copying.

FIG. 6 shows an outline of an additional apparatus for copying.

Claims (5)

[Claims] 1. A light source using a lamp with a reflecting mirror as a light source, changes the direction of an optical axis of a light beam emitted by a plane reflecting mirror, and condenses the light beam on an entrance pupil of a projection lens to collect transmitted light. In a projector that projects on a screen, the intake side of the fan, whose intake and exhaust are not coaxial, uses the exhaust side to cool the condensing system and the transmission material, and cools both of them by using the exhaust side to cool the light source. Projector with fan. 2. A projector having a material exchange mechanism for discharging a framed transparent material being projected in an insertion direction by placing the framed transparent material on a receiving stand and inserting it to a stop position. 3. A transmissive material can be copied by changing the direction of a light beam to be incident on a projection lens in a transmissive material projector and attaching an auxiliary device that illuminates from behind the transmissive material instead of converging light. Transparent document projector. 4. A light beam converging on an entrance pupil of a projection lens after exiting a light source lamp and passing through a light condensing system, or a light beam after passing through a projection lens, in a transmissive material projector in which the entire body is regarded as a light source device. This is a transmissive material projector with an additional optical system that illuminates from the back of the transmissive material and serves as a copy light source. 5. A copying apparatus using the transmissive material projector according to claim 4 as a light source.