JPH0544227B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to the photographing of translucent original images, such as reversal film for still photographs and developed film for 8mm movies, using a camera such as a video camera.
The present invention also relates to a special photographing adapter for a camera that enables the photographing of non-translucent original images that reflect light, such as positive prints, printed matter, and handwritten manuscripts.

FIG. 1 shows a conventional adapter of this type. The casing 1 includes a transparent stand or a perforated stand 3 on which a photographed film (translucent original image) 2 is placed, and a light source 4 of an incandescent bulb to illuminate the film 2.
A projection optical system consisting of a fixed mirror 5 and a fixed mirror 5 for reflecting a projected image is housed therein, and a connection port 7 for connecting a video camera 6 is formed at the exit of the projected image reflected by the mirror 5.

This adapter is used to capture the image of the film 2 with a video camera 6, but in this conventional device, the actual color recorded on the film 2 and the color captured and recorded by the video camera and displayed on the television receiver. When comparing the two, the film 2 must be taken out from the casing 1 and viewed through external light or the like, which poses a problem in that adjustments to the color of the imaged image cannot be made quickly and easily.

In addition, with this conventional product, it is only possible to image translucent original images such as film that transmit light, and it is not possible to image non-transparent original images that do not transmit light. Therefore, non-transparent original images can be directly captured with a video camera. I had no choice but to photograph it.

Based on this awareness of the problem, the present invention aims to provide an adapter that can image not only translucent originals but also non-translucent originals, and which is capable of projecting images of translucent originals. possible projection optical system,
In a special photography adapter for a camera, which has a mirror that bends the optical path of the projection optical system, and a connection port for a camera that takes an image of the translucent original image, which is provided in the optical path after the bending, A monitor/imprint optical system is provided which has a monitor surface capable of projecting the image of the luminous original image and a surface onto which the non-transparent original image is imprinted, and the mirror is composed of an optical path conversion half mirror, and this optical path conversion The position of the half mirror allows the light from the projection optical system to directly enter the connection port of the camera, and the light from the projection optical system is once sent to the monitor/imprint optical system, and the light reflected by the non-transparent original image placed on the projection surface. It is characterized by being able to rotate to a position where it can be inserted into the camera connection port.

The invention will now be described with reference to illustrated embodiments. 2 and 3 each show an embodiment of the present invention, and the same components as those of the conventional product shown in FIG. 1 are given the same reference numerals. In the embodiment shown in FIG. 2, in place of the conventional mirror 5, a
Optical path conversion half mirror 20 consisting of a half mirror
, and a monitor/imprint optical system 30 is provided on the opposite side of the connection port 7 with respect to the optical path conversion half mirror 20 .

The monitor/imprint optical system 30 includes a condenser lens 1
3. A fixed mirror 14 and a condensing lens 15 are provided, and a screen plate 32 and a transparent plate 33 are provided on the focal plane 31.
and can be selected and placed.

The optical path conversion half mirror 20 switches and guides the light from the projection optical system toward the video camera connection port 7 side when it is rotated to the solid line position in the figure, and to the monitor/imprint optical system 30 when it is rotated to the broken line position in the figure. .

This adapter with the above configuration can image and monitor the film 2 placed on the transparent stand or perforated stand 3 when the screen plate 32 is placed on the focal plane 31 of the monitor/imprint optical system 30. constitutes the monitor surface. That is, in this state, when the optical path conversion half mirror 20 is rotated to the solid line position in the figure, the image of the film 2 can be captured by the video camera 6, and when it is rotated to the broken line position, the image of the film 2 can be captured by the video camera 6. can be observed on the screen plate 32 of the monitor/imprint optical system 30.

On the other hand, if a transparent plate 33 is placed in place of the screen plate 31 on the focal plane 31 and the optical path conversion half mirror 20 is rotated to the position indicated by the broken line in the figure, the transparent plate 33
It becomes possible to image the positive image (non-transparent original image) 34 placed above. That is, in this state, the light from the projection optical system is irradiated onto the positive image 34 by the optical path conversion half mirror 20 via the monitor/imprint optical system 30.
The light reflected by the positive image passes through the monitor/imprint optical system 30 and the optical path converting half mirror 20 and enters the video camera 6 again. Therefore positive picture 34
can be imaged. Of course, it is also possible to image non-transparent originals such as printed matter other than positive prints, handwritten manuscripts, characters such as titles written on paper, and captions for video editing. Furthermore, if the film 2 is placed on the transparent stand 33 or the perforated stand 3, images can be taken by overlapping the films 2.

In the above embodiment, the video camera connection port 7 and the monitor/imprint optical system 30 are located on the opposite side of the optical path conversion half mirror 20.
A monitor/imprint optical system 30 may be provided on the optical axis of the projection optical system, which passes through the optical path conversion half mirror 20. FIG. 3 shows an example of this. The monitor/imprint optical system 30 has an extra fixed mirror 35 compared to the embodiment shown in FIG. 2, but other points are the same as the first embodiment, and the same parts are The same symbols are attached.

In this embodiment, if the optical path converting half mirror 20 is rotated to the solid line position in the figure and the screen plate 32 is placed on the focal plane 31 of the monitor/imprint optical system 30, the same as in the embodiment shown in FIG. Imaging of the film 2 by the video camera 6 and observation by the screen plate 31 can be performed simultaneously. Then, if the transparent plate 33 is placed on the focal plane 31 and the optical path conversion half mirror 20 is rotated to the position shown by the broken line in FIG. be able to. The difference from the embodiment shown in FIG. 2 is that the optical path conversion half mirror 20 first bends the light from the projection optical system and then transmits it, or first transmits it and then bends it.

In the above embodiment, the monitor/imprint optical system 3
Although the 0 focal plane 31 is shared by the monitor plane and the projection plane, they can be provided separately and the light from the projection optical system can be selectively guided by a direction-changing half mirror. Alternatively, a screen plate may be stacked under the transparent plate, and the screen plate may be made into a pull-out type.

As described above, according to the special photography adapter for a camera according to the present invention, the image of the translucent original image projected by the projection optical system can be observed using the monitor and projection optical system. For example, when capturing an image of a translucent original image with a video camera, the colors projected on the video receiver and the colors recorded on the film can be simultaneously compared and color adjustments can be made. It is easy to use. Furthermore, the monitor/imprint optical system is equipped with a surface for imprinting a non-transparent original image, and the non-transparent original image placed on this imprinting surface can be moved by rotating a direction-changing half mirror. , can be photographed with the same camera, and therefore, regardless of whether the original image is translucent or non-transparent, it is possible to take a photo with a simple switching operation.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a conventional camera adapter for special photography, and FIGS. 2 and 3 are cross-sectional views showing embodiments of the adapter of the present invention. 1...Casing, 2...Film (translucent original),
4...Light source, 6...Video camera, 7...Connection port, 20
...Optical path conversion half mirror, 30...Monitor/imprint optical system, 31...Focal plane, 32...Screen plate,
33...Transparent plate, 34...Positive painting (non-transparent original painting).

Claims (1)

[Claims] 1. A projection optical system capable of projecting an image of a transparent original image;
A special photography adapter for a camera, which includes a mirror that bends the optical path of the projection optical system, and a connection port for a camera that takes an image of the translucent original image, which is provided in the optical path after the bending. a monitor/imprint optical system having a monitor surface capable of projecting an image of a translucent original image, and a surface onto which a non-transparent original image is imprinted; This optical path converting half mirror is placed at a position where the light from the projection optical system directly enters the connection port of the camera, and at a non-transparent position where the light from the projection optical system is once passed to the monitor and projection optical system and placed on its projection surface. A special photography adapter for a camera, characterized in that it can be rotated to a position where reflected light from a photogenic original image is input into a camera connection port. 2. The adapter for special photography of a camera according to claim 1, wherein the monitor/imprint optical system is provided on the opposite side of the video camera connection port with respect to the optical path conversion half mirror. 3. The adapter for special photography of a camera according to claim 1, wherein the monitor and projection optical system is provided on the optical axis of the projection optical system, which passes through an optical path conversion half mirror. 4. In any one of claims 1 to 3, the monitor surface and the projection surface of the monitor/imprint optical system are on the same focal plane, and a screen plate or a transparent plate is selected. A special photography adapter for a camera that can be used as a monitor surface or an imprint surface.