JPH1062868A - Slide projector and its cartridge holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a slide projector by which both slide films can be used by providing a projecting device capable of being loaded with both roll-state slide film and the slide film which is fixed by each image plane and capable of projecting any one of optional image plane of both slide films, and a viewer projecting the small image of the same image plane as monitor. SOLUTION: A film image plane guide 6A is locked to a reversal film taking up and rewinding mechanism housed in a cartridge, and moves and sets a required image plane to a projecting position. A mount guide 6B moves and sets the required image plane of the reversal film fixed to the film mount by each image plane to the projecting position. A white light beam obtained by a ground glass 4 is transmitted through the reversal film RF set to the specified position by the guide 6A and the guide 6B so as to be image light, passes through a half mirror 21 and the transmitted light is made incident on a lens 5a, and reflected light enters toward a viewer image formation lens 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide projector for projecting an image photographed on a reversal film onto a screen, and more particularly to a slide projector having a viewer so that a projected image of a required screen can be confirmed as a monitor, and housed in a cartridge. The present invention relates to a slide projector having features such as being capable of projecting a rolled reversal film in a state and being capable of arbitrarily inputting and setting a projection order.

[0002]

2. Description of the Related Art There are various appreciation methods for taking a picture with a reversal film, but the most suitable method is to pack the image in a mount frame for each screen and project the image on a screen using a slide projector. General. Advances in slide projectors have been devised to facilitate handling, such as speeding up frame advancement, providing an autofocus function, and remote control.

[0003] However, it is difficult to confirm the image to be projected due to its structure. This is because many films packed in the mount frame are tightly loaded in the cartridge and cannot be easily removed. As a result, the wrong film was projected, or the projection was performed in a different order, so that the enjoyment of viewing was reduced by half, or the presentation site was sometimes messed up.

[0004]

SUMMARY OF THE INVENTION On the other hand, advanced
Films for the new system have appeared on the market under the name Photo System, and cameras will not be compatible with conventional films. Therefore, a reversal film is also required for the new system. The film feature for the new system has a smaller screen size than the conventional 135 type, and is housed in a small cartridge,
That is, the film has a magnetic recording layer. Such a film slide projector is naturally required, but if it is packed in a mount frame as in the prior art, it becomes difficult to effectively use magnetically recorded information, which is not preferable. Therefore, it would be very convenient if a slide projector capable of projecting the roll-shaped film stored in the cartridge as it is could be made.

[0005] In addition, a required screen can be confirmed with a small image by a built-in viewer, an image can be projected in an arbitrary screen order selected and input in advance, or the screen order can be organized by the viewer. Or it is desirable to have a function that can be confirmed.

A slide which can be used as a 135 type slide film loaded in a mount for each screen and a roll type slide film of the advanced photo system loaded in a cartridge. Realization of a projector is desired.

An object of the present invention is to provide such a slide projector.

[0008]

This object is achieved by any of the following technical means (1) to (10).

(1) A projection apparatus for projecting an arbitrary screen of a roll-shaped sly film housed in a cartridge to obtain a projection image, and an optical path of an optical system of the projection apparatus which is branched and smaller than the projection image A slide projector comprising: a viewer that projects a small image of a screen as a monitor.

(2) A projection apparatus for projecting an arbitrary screen of a slide film fixed to a mount one screen at a time to obtain a projection image, and a light path of an optical system of the projection apparatus is branched to be smaller than the projection image. A slide projector comprising a viewer for projecting a small image of the same screen as a monitor.

(3) Both a roll-shaped slide film housed in a cartridge and a slide film fixed to a mount one screen at a time can be loaded, and any one of the two slide films is projected and projected. And a viewer for branching the optical path of the optical system of the projection device and projecting, as a monitor, a small image of the same screen smaller than the projected image.

(4) The slide projector according to any one of (1) to (3), wherein a half mirror is used for branching an optical path of the optical system.

(5) It is possible to switch between a case where one of the image projected by the projection device and a small image projected by the viewer is independently projected and a case where both are projected. (1) to (4) The slide projector according to any one of the above items.

(6) A slide projector capable of projecting an arbitrary screen of a roll-shaped slide film accommodated in a cartridge, wherein the slide projector corresponds to a projected image of an arbitrary screen of the slide film and a projected image of an adjacent screen. A slide projector comprising a viewer that allows each small image to be checked as a monitor.

(7) A slide projector capable of projecting a roll-shaped slide film stored in a cartridge, comprising a viewer capable of projecting a small image of an arbitrary screen of the slide film and confirming the image as a monitor,
A slide projector wherein an arbitrary projection order can be set based on confirmation of the monitor.

(8) A cartridge holder capable of loading a plurality of roll-shaped slide films stored in the cartridge can be mounted, and a cartridge number of a screen to be projected and a screen number can be input. A slide projector wherein the cartridge holder is driven and controlled such that the screen of the slide film having the screen number moves to the projection position.

(9) A cartridge holder into which a plurality of roll-shaped slide films accommodated in a cartridge can be loaded, wherein when mounted on a slide projector, an arbitrary cartridge and an arbitrary slide film of the cartridge are mounted. A cartridge holder having a connection drive mechanism driven by a slide projector so that a screen can move to a projection position.

(10) The slide projector according to any one of (1) to (8), wherein a microphone or a speaker is incorporated.

Since the slide projector of the present invention has a viewer, it has an advantage that the image of the film screen to be projected can be confirmed near the slide projector. The image projected on the viewer can be taken out by inserting a half mirror into the optical system of the slide projector. In addition, by enabling switching between projection on the screen and projection on the viewer, the slide viewer can be used alone.

In addition to the 135 type roll film, a new advanced photo system (hereinafter referred to as AP) is also available.
S) has been commercialized and its photosensitive material is commercially available. In this system, a roll film containing a cartridge is loaded into a camera, conveyed in the camera for each screen, and photographed. The film is rewound into the cartridge, taken out of the camera, sent to the lab, pulled out of the cartridge, and developed and developed.The reversal film for slides is used as it is, and the negative film for printing is pulled out of the cartridge. After being printed on photographic paper by a printer, it is rewound into a cartridge and returned to the user.

Therefore, by using a slide projector capable of projecting the roll-shaped slide film stored in such a cartridge, it is possible to cope with another new photographic system. The sheet-like slide film fixed to the current mount one screen at a time and the roll-like slide film housed in the cartridge can be projected as a single device or as a combined device and switched to either device. There can be.

One of the major features of the present invention is to provide a slide projector capable of confirming a roll-shaped slide film stored in a cartridge with a viewer and inputting and setting an arbitrary projection order. Although the rolled slide films are arranged in the order in which they were photographed, they do not always match the order in which they are projected, and there is a possibility that some images do not need to be projected.

The input of the projection order may be set on the basis of the number of perforations of the rolled slide film or on the basis of the frame number information of the magnetic recording layer. If a cartridge can be identified, it is possible to load a plurality of cartridges and select an arbitrary film screen of an arbitrary cartridge. Traditional,
Compared with a sheet-like slide film fixed to a mount one screen at a time, many images can be stored in a small space, and the image can be projected in an arbitrary order.

By incorporating a microphone in the slide projector as an accessory, the projector can be explained in the vicinity of the slide projector. The microphone at this time may be cordless or corded. By incorporating a speaker in the slide projector, the explanation of the projector and the explanation of the presenter at a remote position can be amplified in volume.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

First, a third embodiment will be described with reference to FIGS. 1, 6, and 7. FIG. FIG. 1 is a side view of an optical system of a slide projector according to the present invention, FIG. 6 is a schematic configuration diagram centered on the optical system viewed from above, and FIG. 7 is a perspective view thereof.

1 and 6, a lamp 1 is a reflector type lamp having a reflector 1b and a lens 1c and irradiating white light emitted from a filament 1a in a specific direction.

The heat-cut filter 2 emits heat from the lamp 1 so that other components of the slide projector, a cartridge in which the reversal film RF is stored (loaded), and a roll-shaped film or a 135-type film thereof. It prevents the film fixed to the mount one screen at a time from being affected.

The Fresnel lens 3 is a lens for converting white light emitted from the lamp 1 into substantially parallel light. Since the Fresnel lens 3 can be used at a position close to the lamp 1 to obtain substantially parallel light rays, the external dimensions of the slide projector can be reduced.

The ground glass 4 is inserted after the Fresnel lens 3 in order to remove luminance unevenness caused by the Fresnel lens 3. That is, when the Fresnel lens 3 is used, unevenness in luminance occurs due to a step provided on the curved surface. Since the light beam transmitted through the frosted glass 4 is irregularly reflected, a light beam having a substantially uniform luminance distribution can be obtained.

The zoom lens system 5 is a reversal film R
An optical system for changing the projection magnification when projecting the image light transmitted through F onto the screen Sc to form an image. Then, just before the zoom lens, the optical path is branched by a half mirror 21 at an angle of 45 degrees or more with respect to the optical axis, and a viewer imaging lens 25 is provided on the optical axis of the branched optical path,
An optical system for forming a projected small image is also provided on a viewer image forming plane (small image projection plane) 23 as a monitor by the lens. The zoom lens system 5 of the present embodiment changes the projection magnification of the projected image on the screen Sc by changing the distance between the lens 5a and the lens 5b, and then converts the image light by the focus lens 5c to the screen S.
c. Further, a monitor image is formed by a branched optical path to which a half mirror 21 and a viewer imaging lens 25 are added. The zoom lens system drive mechanism 5d is a drive mechanism that moves the lenses 5a, 5b, and the focus lens 5c. In addition, the viewer lens driving mechanism 27 also drives the viewer imaging lens 25 in the branch optical axis direction in response to the fact that the screen setting position on the optical axis is different when switching between the cartridge film and the mount film, and the viewer imaging surface (small). The focus on the image projection plane 23 is perfect. That is, the zoom lens system 5 changes the zoom ratio by changing the distance between the lens 5a and the lens 5b by the zoom lens system driving mechanism 5d according to a command from the CPU 9, and further shifts the focus lens 5c to a position corresponding to the changed zoom ratio. Is moved to change the zoom ratio and form an image on the screen Sc. It goes without saying that the projection magnification is determined by the determination of the zoom ratio. Further, the zoom lens system driving mechanism 5d detects the lens position using a potentiometer, and can feed back information on the zoom ratio.

The film screen guide 6A is provided with a reel 50 serving as a winding and rewinding mechanism for rewinding the reversal film RF stored in the cartridge in the slide projector.
A guide to lock the leading edge of the film and to move and set the required screen to the projection position.
The mount guide 6B is a transport guide for moving and setting a required screen of the reversal film RF fixed to the film mount M one screen at a time to a projection position. These guides are located between the frosted glass 4 and the half mirror 21 and guide to a predetermined projection position which is set so as to transmit a substantially parallel white light having a uniform luminance distribution obtained by the frosted glass 4. That is, the white light obtained by the frosted glass 4 is applied to the reversal film R set at the predetermined position by the film screen guide 6A and the mount guide 6B.
The transmitted light passes through the half mirror 21 to become image light. The transmitted light enters the lens 5 a via the half mirror 21, and the reflected light enters the viewer imaging lens 25.

The roll film moving set mechanism 15 is
A mechanism for controlling a required screen of the rolled film stored in the cartridge 41 to be conveyed to the screen projection position along the film screen guide 6A, so that the winding and the feeding can be performed quickly and freely in the order of the projection program. It is. Although not shown, the quick-acting operation mechanism is a gear train including a planetary gear and a sun gear, which are generally used as a mechanism for winding and rewinding a roll film in a camera, and a structure in which the gear train is rotated forward and backward by a stepping motor. Can be applied. The cartridge 41
When the roll-shaped film put in the cartridge is mounted on the cartridge mounting port 48 of the slide projector 10 and covered with the lid 46, the leading end of the film is sent to the reel 50 by the above-mentioned operation mechanism, and the well-known film used for a camera or the like is used. After loading, the above-described winding and feeding are performed by an automatic loading mechanism including rollers and the like.

The mount holder 7 has a plurality of sections 7.
a and an entrance 7b, and the film mount M is held one by one in one section 7a.

The mount drive mechanism 8 drives the rack gear 7A provided on the mount holder 7 with a pinion, and the film mount M mounted on the mount holder 7 is mounted.
To the position corresponding to the end 6B1 of the mount guide 6B, and sequentially transported through the entrance 7b provided in the holder 7, and the mount film is positioned at a predetermined projection position defined by the mount guide 6B. This is a loading mechanism for loading M. That is, since the mount driving mechanism 8 sequentially sends out the film mounts M from the mount holder 7, if the film mounts M are arranged and held in the mount holder 7 in the order of screening, the order of screening can be set. It is very convenient to incorporate the viewer 20 as a means for determining the order while actually observing and confirming the order with eyes. In this embodiment,
The time required to load the film mount M from the mount holder 7 to the predetermined position by the mount driving mechanism 8 was set to be slightly longer than the time required for the zoom lens system driving mechanism 5d to move from the telephoto position to the wide position.
Therefore, at the end of the loading, the zoom lens system 5 can surely project the image immediately after the change of the magnification to the set magnification is completed.

The CPU 9 is a central processing unit for sequence control of the slide projector. Outputs of sensors 11A and 11B for detecting screen size information (for example, information of 135 type full size or half size, information of APS type standard size, panorama size or high definition size) and stored in memory 9A The reference information and the distance information to the screen Sc are compared and calculated, and the zoom ratio of the zoom lens system 5 is determined. When the zoom ratio is determined, the CPU 9 sets the zoom lens system driving mechanism 5d.
Is driven to control the lens 5a and the lens 5 according to the zoom ratio.
b, instruct the shift of the focus lens 5c. Also, C
The PU 9 moves and sets the rolled film through the rolled film moving set mechanism 15 according to the command, and sets a required film screen at a predetermined projection position. Alternatively, the controller controls the mount driving mechanism 8 to convey the film mount M to a predetermined position.

The memory 9A is a memory to which data can be written. In the present embodiment, the CPU 9 and the memory 9A
This constitutes the magnification determining means of the present invention.

The sensor 11A detects the screen size while the rolled film in the cartridge is being transferred to the projection position along the film screen guide 6A by the rolled film moving set mechanism 15.

The sensor 11B detects screen size information while the film mount M is being moved from the mount holder 7 to the mount guide 6B by the mount driving mechanism 8. The sensors 11A and 11B output data relating to the detected screen size information to the CPU 9.

The above is the embodiment relating to claim 3, but other embodiments will be described for each claim.

As shown in FIG. 1, a side view of the optical system shown in FIG. 1, a configuration of the optical system shown in FIG. 2 as viewed from above, and a perspective view of FIG. A required screen of the slide film is pulled out to a projection position so that a projection image and a monitor projection small image can be set arbitrarily, and magnification adjustment and focus switching adjustment are also possible. That is, the function relating to the sheet-like slide film is removed from the function of the embodiment of claim 3,
This is a compact roll-shaped slide film dedicated device, and the function of this roll-shaped slide film as a slide projector is substantially the same as that described in claim 3, so that further description is omitted.

A second embodiment of the present invention relates to a sheet placed in a mount holder 7 as shown in the side view of the optical system of FIG. 1, the configuration of the optical system of FIG. 4 as viewed from above, and the perspective view of FIG. A desired screen of the slide film is pulled out to a projection position so that a projection image and a monitor projection small image can be set arbitrarily, and magnification adjustment and focus switching adjustment are also possible. That is, the function relating to the roll-shaped slide film loaded in the cartridge 41 is eliminated from the function of the third embodiment, and a compact dedicated device for the sheet-shaped slide film is provided. Since the function as the projector is substantially the same as that described in claim 3, further description is omitted.

In the fourth embodiment, the optical system of the first to third embodiments uses the half mirror 21 as shown in the optical systems of FIGS. It is an embodiment of the present invention to use a branching means for obtaining a monitor projected image from the optical system for producing the projected image.

According to the fifth embodiment, as shown in FIG. 1, a shutter 18 is provided on the optical path of the image projected on the screen Sc.
A, Viewer projection for monitor A shutter 18B is provided for the optical path of the small image plane, these can be opened to project both the screen and the monitor, or only one of them can be opened to open the screen or the screen. It is also possible to project only the monitor.

In the sixth embodiment, a side view of the optical system shown in FIG. 1, a structural view of the optical system shown in FIG.
When a required screen of the roll-shaped slide film loaded in the cartridge 41 is pulled out to the projection position, as shown in the perspective view of FIG. Can be obtained side by side as a small projection image by a viewer 20A of an independent optical system provided separately, and magnification adjustment and focus switching adjustment are also possible. The optical system of the independent viewer 20A is a lamp 1A, a heat cut filter 2
A, Fresnel lens 3A, ground glass 4A, mirror 21
A, a viewer imaging lens 25A, and a small image projection surface 23A are provided, but since the lamp 1A does not need to project a screen, a lamp having a small capacity that is about half as small as the lamp 1 is sufficient.

According to a seventh embodiment of the present invention, at least the cartridge 41 is loaded as a single unit as shown in the perspective view of FIG. 3 or FIG. While checking the projected small image as a monitor image on the viewer 20, the screen number is determined by the keyboard 32 in the required projection order in the memory 9A.
It is possible to input to.

In the embodiment of the present invention, as shown in the perspective view of FIG. 8, at least an arbitrary screen of the roll-shaped slide film housed in the cartridge 41 is pulled out to a projection position, and the projected small image is used as a monitor image. While confirming with the viewer 20, each required screen is sequentially entered into the keyboard 32 while specifying the cartridge number and the screen number, and the projection order is established in that order and stored in the memory 9A. The setting result can be displayed on the display 33. As shown in the drawing, the cartridge 41 has a plurality of cartridges 41 loaded in the cartridge holder 40, and assigns a specific number to each cartridge 41, and as described above, the keyboard 3
2 can be entered. Also, each mount film loaded in the mount holder 7 in a certain order,
By pulling out an arbitrary screen to the projection position and confirming the projected small image as a monitor image on the viewer 20, the screen number of a required mount film is entered into the keyboard 32 in a required projection order so that it is stored. is there.

Both the cartridge holder 40 and the mount holder 7 are provided with rack gears 40A and 7A, respectively, and a driving device (not shown) of the slide projector 10 rotates a pinion that meshes with the rack gear 40A or 7A, and the cartridge holder shown in FIG. FIG. 12 which is a perspective view, a partial top view and a partial side view thereof.
(A) and (b), as shown in FIG.
The holder 40 or 7 is moved to a position where the film entrance 44 of the required cartridge 41 or the required mount film M of the mount holder 7 coincides with the end 6A1 or 6B1 of the mount guide 6B or the end 6A1 or 6B1 of the mount guide 6B. The sheet is fed by the driving device through the slit 40b or 7b so that a desired screen of a roll-shaped slide film or a mount film is further positioned at the screen projection position. And such an operation is, for example, the keyboard 3 first.
2 is automatically operated continuously by the instruction of the CPU 9 according to the data input by the CPU 2, and required screens are sequentially projected in a required order.

According to the ninth embodiment, as shown in the perspective view of FIG. 11 and FIGS. 12 (a) and 12 (b), a plurality of cartridges 41 can be stored in each nest at a predetermined position, and the cartridge entrance 44 6A film screen guide corresponding to
Each of the slits 40b is connected to the end 6A1 of the slide projector, and a connection passage hole 40c for attachment / detachment of the drive shaft 61 of the drive device of the slide projector for connection with the connection hole 42 of the spool of the cartridge 41 is further provided. Is a cartridge holder 40 provided with a rack gear 40A for entering and exiting the slide projector 10. Thus, a large number of screens can be stored at one time in one small slide projector.

In the tenth embodiment, a speaker or a cordless microphone is incorporated in the slide projector of each of the first to eighth embodiments. This makes the slide projector of the present invention versatile and convenient despite its small size.

The remote controller 12 is a remote controller for a user to control the operation of the slide projector according to the present invention. The remote controller 12 according to the present embodiment sends signals relating to the forward feed, reverse feed, and adjustment of the projection magnification of the film mount M to the CPU 9.
By outputting to the user, the slide projector can be controlled from the user's hand. Although the remote controller 12 of the present embodiment is of a wired type, an infrared type or the like may be applied. Although the slide projector having the remote controller 12 is described in the present embodiment, the operation may be controlled by a controller integrated with the slide projector body.

The screen Sc is a large screen having a movable curtain Sc2 on both sides of a white cloth Sc1 on which an image is to be projected by the slide projector of the present invention. The screen Sc is a curtain Sc on both sides
2 can be changed to change the screen width. If the projection image can be obtained by the conventional slide projector, the projection image can also be obtained by the slide projector of the present invention.

By the way, the viewer 20 of the slide projector of the present invention is a system for viewing an image projected on frosted glass or opal glass, but it is possible to enlarge the image by providing a loupe above the image surface.

In the above-described embodiment of the present invention, the optical system to the viewer 20 adopts a system in which the optical path is branched by placing the half mirror 21 before entering the zoom lens. However, the present invention is not limited to this. Instead, for example, a system may be adopted in which the half mirror 21 is placed between the lenses 5b and 5a of the zoom lens system to split the optical path.

[0055]

According to the slide projector which also serves as a viewer of the present invention, a required screen of a roll-shaped slide film in a cartridge can be determined while observing and confirming with a viewer, and the projection order can be determined very easily. It became so.

Further, a conventional slide projector for a mount film can also have a similar function by also using a viewer.

Since the structures are simple, the slide projector which can be used for both types of slide films can be realized in a small size.

A slide projector in which a roll-shaped slide film containing a cartridge can be loaded as a single unit can be realized, and a slide projector in which a cartridge holder in which a plurality of cartridges are loaded can be mounted.

The screen of the slide film placed in a plurality of cartridges loaded in the cartridge holder or a single cartridge not using the cartridge holder, and the screen of the mount film placed in the mount holder are respectively sent to the projection position and the images are sent. It is now possible to easily determine the projection order and input through the numeric keypad while observing with a viewer.

When a cartridge holder corresponding to such a configuration is used, a small slide projector 1 is used.
It is possible to store a large number of screens at a time on a table. As a result, it is possible to continuously perform screening without interrupting the process and re-attaching a new cartridge.

By incorporating a speaker or a cordless microphone into these slide projectors, the slide projector of the present invention is versatile and convenient despite its small size.

[Brief description of the drawings]

FIG. 1 is a side view of an optical system according to an embodiment of a slide projector of the present invention.

FIG. 2 is a schematic configuration diagram when the optical system is viewed from above in an example of the embodiment of the slide projector of the present invention.

FIG. 3 is a perspective view of an example of an embodiment of the slide projector according to the present invention.

FIG. 4 is a schematic configuration diagram when the optical system is viewed from above in an example of the embodiment of the slide projector of the present invention.

FIG. 5 is a perspective view of an example of an embodiment of the slide projector according to the present invention.

FIG. 6 is a schematic configuration diagram when the optical system is viewed from above in an example of the embodiment of the slide projector of the present invention.

FIG. 7 is a perspective view of an example of an embodiment of a slide projector according to the present invention.

FIG. 8 is a perspective view of an example of an embodiment of the slide projector according to the present invention.

FIG. 9 is a schematic configuration diagram when the optical system is viewed from above in an example of the embodiment of the slide projector of the present invention.

FIG. 10 is a perspective view of an example of an embodiment of the slide projector according to the present invention.

FIG. 11 is a perspective view of an example of an embodiment of the cartridge holder of the present invention.

12A is a partial top view of FIG. 11, and FIG.
FIG. 12 is a partial side view of FIG. 11.

[Explanation of symbols]

 1, 1A lamp 2, 2A heat cut filter 3, 3A Fresnel lens 4, 4A ground glass 5 zoom lens system 5a, 5b, 5c lens 5d zoom lens system drive mechanism 6A film screen guide 6B mount guide 7 mount holder 8 mount drive mechanism 9 CPU 9A memory 10 slide projector 11A, 11B sensor 15 roll film moving set mechanism 20, 20A viewer 21 half mirror 21A mirror 23, 23A viewer imaging surface (small image projection surface) 25, 25A viewer imaging lens 27 viewer lens drive Mechanism 32 Keyboard 40 Cartridge holder 40A Rack gear 40b Slit 40c Connection passage hole 41 Cartridge 42 Connection hole 44 Doorway 48 Cartridge mounting port 50 Reel 61 Drive Axis

Claims (10)

[Claims] 1. A projection apparatus for projecting an arbitrary screen of a roll-shaped slide film stored in a cartridge to obtain a projection image, and a same screen smaller than the projection image by branching an optical path of an optical system of the projection apparatus. And a viewer for projecting the small image as a monitor. 2. A projection apparatus for projecting an arbitrary screen of a slide film fixed to a mount one screen at a time to obtain a projection image, and an optical path of an optical system of the projection apparatus, the same being smaller than the projection image. A slide projector comprising: a viewer that projects a small image of a screen as a monitor. 3. A roll-shaped slide film housed in a cartridge and a slide film fixed to a mount one by one can be loaded, and any one of the two slide films is projected to project a projected image. A slide projector comprising: a projection device to be obtained; and a viewer that branches a light path of an optical system of the projection device and projects a small image of the same screen smaller than the projection image as a monitor. 4. The slide projector according to claim 1, wherein a half mirror is used for branching an optical path of the optical system. 5. The apparatus according to claim 1, wherein a case where one of the image projected by the projection device and a small image projected by the viewer is independently projected or a case where both are projected can be switched. 2. The slide projector according to claim 1. 6. A slide projector capable of projecting an arbitrary screen of a roll-shaped slide film housed in a cartridge, wherein the small projector corresponds to a projected image of an arbitrary screen of the slide film and a projected image of an adjacent screen. A slide projector characterized by having a viewer that can check each image as a monitor. 7. A slide projector capable of projecting a roll-shaped slide film stored in a cartridge, comprising a viewer capable of projecting a small image of an arbitrary screen of the slide film and confirming the monitor as a monitor. A slide projector characterized in that an arbitrary projection order can be set based on an image. 8. A cartridge holder capable of loading a plurality of roll-shaped slide films accommodated in a cartridge can be mounted, and a cartridge number of a screen to be projected and a screen number can be input. Wherein the drive of the cartridge holder is controlled so that the screen of the slide film having the screen number moves to the projection position. 9. A cartridge holder into which a plurality of roll-shaped slide films stored in a cartridge can be loaded, and when mounted on a slide projector, an arbitrary cartridge and a screen of an arbitrary slide film of the cartridge. Having a connection drive mechanism driven by a slide projector so as to be movable to a projection position. 10. The slide projector according to claim 1, wherein a microphone or a speaker is incorporated.