JPS59131272A - Adaptor for special photographing of video camera - Google Patents

Abstract

PURPOSE:To compare easily colors of a camera picture with that of a monitor picture by providing a monitor optical system via an optical converting mirror or a half mirror to a projecting optical system for special photographing of a video camera. CONSTITUTION:A plate 3 placing a photographed film, a light source 4 and a mirror 11 are stored in a casing 1. A monitor optical system 10 is provided at an opposite side to the video camera 6 with respect to the mirror 11. The monitor optical system 10 consists of a condensor lens 13, a fixed mirror 14, a condensor lens 15 and a screen 16. The mirror 11 is made turnable around a shaft 12 and leads an image of a film 2 to the video camera 6 in the position of solid lines and to the monitor optical system 10 in the position of dotted lines. Thus, the projected picture is displayed on a monitor screen to compare said picture with the color of the output picture of the video camera.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to photographing objects that transmit light, such as still photographic universal film and developed 8mm movie film, as well as objects that reflect light, such as positives, printed matter, and handwritten manuscripts. This invention relates to a special photography adapter for a video camera that enables imaging.

FIG. 1 shows a conventional adapter of this type. The casing l houses a projection optical system consisting of a transparent stand or perforated stand 3 on which the photographed film 2 is placed, a light source 4 of an incandescent bulb that illuminates the film 2, and a fixed mirror 5 that refracts the projected image. A connection lower connecting a video camera 6 is formed at the exit of the projected image refracted by the mirror 5.

This adapter is used to capture the image of the film 2 with the 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 above, 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 colors of the images cannot be quickly and easily performed.

Furthermore, this conventional product can only image films that transmit light, but cannot image objects that do not transmit light. Therefore, positive images, printed matter, and the like had to be directly imaged with a video camera.

The present invention was made based on such an awareness of the problem, and in addition to the above-mentioned elements of the conventional product, a monitor optical system for displaying the image of the film projection optical system is provided, and an optical path conversion mirror or /\- By directing the film image from the projection optical system to either the monitor optical system or the video camera connection port, or to both at the same time, the film image projected by the projection optical system is It is characterized in that the color of the filter t can be easily compared with the color of a recorded image that is captured and displayed on a television receiver.

The second invention of the present invention provides an adapter that can photograph objects that do not transmit light, and is a special photographic adapter of a type in which the light from a projection optical system is bent by a mirror and guided to a connection port of a video camera. In the adapter for the first invention, the monitor optical system in the first invention can be connected to
In addition to replacing the monitor/imprint optical system with a projection surface, the bipedal mirror is made into a half mirror, and this half mirror is made rotatable so that it can be transferred from the projection optical system to the monitor/imprint optical system for imprinting. The feature is that the light reflected by the surface can be supplied to the connection port of the video camera.

The invention will now be described with reference to the illustrated embodiments. 2 and 3 each show an embodiment of the first invention 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, a new element added to the conventional product is a monitor optical system 10 located on the opposite side of the connection lower with respect to the mirror 11, and the mirror 11 is different from the fixed mirror 5 of the conventional product. The optical path conversion mirror 11 is rotatable about a shaft 12. This optical path converting mirror 11 switches and guides the light from the projection optical system to the video camera connection lower side when rotated to the solid line position in the figure, and to the monitor optical system 10 when rotated to the broken line position in the figure. The monitor optical system 10 includes a condensing lens 13, a fixed mirror 14, a condensing lens 15, and a screen 16, and an image of the film 2 formed by the projection optical system is formed on the screen 16.

Therefore, according to this adapter configured as described above, by rotating the optical path converting mirror 11 to the solid line position, the video camera 6 can capture the second film image, and by rotating the optical path converting mirror 11 to the broken line position, the second film image can be captured by the video camera 6. It can be observed on the screen 16J- of the optical system IO.

FIG. 3 shows a second embodiment of the invention. In this embodiment, a half mirror 17 is installed between a conventional transparent or perforated table 3 and a fixed mirror 5, and the image of the film 2 branched and refracted by this half mirror 17 is observed using a monitor optical system 10. This is how it was done. The monitor optical system 10 is -
It consists of a condensing lens 18 and a screen 16.

According to this embodiment, the video camera 6 of the image of the film 2
The advantage of being able to simultaneously perform imaging using the lj and observing using the screen 16 of the monitor optical system 10 is
It will be done.

Further, FIGS. 4 and 5 show an embodiment of the second invention of the present invention. In both of the above two embodiments, it is possible to image and monitor a film-like object that transmits light, but it is not possible to image an object that is opaque and reflects light. On the other hand, the embodiments shown in FIGS. 4 and 5 are capable of capturing images of opaque bodies such as positives. First, referring to FIG. 4, this embodiment differs from the embodiment shown in FIG. 2 in that the direction conversion mirror 11 in the embodiment shown in FIG. The only difference is that the imprint optical system 3o is used. The monitor illumination optical system 3o constitutes a monitor optical system in which the screen plate 32 becomes the monitor surface when a screen plate 32 is placed on its focal plane 31 as in the first embodiment, and a transparent plate 33 is placed on the monitor optical system 3o. In some cases, the transparent plate 33 constitutes an imprinting optical system that serves as an imprinting surface, and the other optical system is the same as the monitor optical system shown in FIG.

According to this embodiment, when the screen plate 32 is placed on the focal plane 31 of the monitor illumination optical system 30, by rotating the half mirror 20, the transparent stand or Film 2 placed on perforated table 3
can be imaged and monitored. Further, when the transparent plate 33 is placed on the focal plane 31 and the half mirror 20 is rotated to the position indicated by the broken line in the figure, the positive image 33 placed on the transparent plate 33 is
It becomes possible to take images of That is, in this state, the light from the projection optical system is irradiated onto the positive image 34 by the half mirror 20 via the monitor illumination optical system 30, and the light reflected from the positive image is again transmitted to the monitor illumination optical system 30 and the half mirror 20. and enters the video camera 6. Therefore, the positive image 34 can be imaged. Of course, it is also possible to image printed materials other than positive images, handwritten manuscripts, characters such as titles written on paper, titles for video editing, etc.

Furthermore, if the film 2 is placed on a transparent stand or a perforated stand 3, images can be taken by stacking the films 2 on top of each other.

In the second embodiment, the video camera connection lower and the monitor illumination optical system 30 are located on the opposite side of the mirror 20, but the light from the projection optical system that has passed through the half mirror 20 is A monitor illumination optical system 30 may be provided on the axis. FIG. 5 shows an example thereof. The monitor illumination optical system 30 has an extra fixed mirror 35 compared to the embodiment shown in FIG. 4, but other points are the same as the first embodiment, and the same parts are The same symbol is marked with 4.

In this embodiment, the half mirror 20 is rotated to the solid line position in the figure, and the focal plane 31 of the monitor illumination optical system 30 is rotated.
If a screen plate 32 is placed on the screen plate 32, the film 2 can be imaged by the video camera 6 and observed by the screen plate 31 at the same time, similar to the embodiment shown in FIG. If the transparent plate 33 is placed on the focal plane 31 and the half mirror 20 is rotated to the position shown by the broken line in FIG. can. It will be understood that the difference from the embodiment shown in FIG. 4 is that the light from the projection optical system is first bent by the half mirror 20 and then transmitted, or is transmitted first and then bent. .

In the above embodiment, the focal plane 31 of the monitor projection optical system 30 is shared by the monitor surface and the projection surface, but it is provided separately, and the light of the projection optical system is selected by a direction conversion mirror. It can be used to guide the user. Alternatively, a screen plate may be stacked under the transparent plate, and the screen plate may be made into a pull-out type. Furthermore, depending on the purpose, a transparent plate may be fixed to the focal plane 31 to configure a dedicated imprinting optical system,
Alternatively, a dedicated monitor optical system may be constructed by fixing the screen plate.

As described below, according to the adapter for special photography of a video camera according to the present invention, it is possible to observe the filter image projected by the projection optical system on the monitor optical system at the same time or by a simple operation. Therefore, when capturing a film image with a video camera, it is possible to simultaneously compare the colors displayed on the video receiver and the colors recorded on the film J, and perform color adjustments, etc. It can be easily used when In addition, by changing the monitor optical system to a monitor illumination optical system and making the mirror that bends the light from the projection optical system and feeds it to the video camera rotatable as a half mirror, you can easily photograph opaque and reflective subjects. The effect of being able to capture an image with a video camera is obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional adapter for special photography of a video camera, FIGS. 2 and 3 are sectional views showing embodiments of the adapter of the present invention, and FIGS. 4 and 5 are sectional views of an embodiment of the adapter of the present invention, respectively. FIG. 3 is a sectional view showing an embodiment of the second invention. l...Casing, 2...Film, 4...Light source, 6...Video camera, 7...Connection port, 10...
Monitor optical system, 11... Optical path conversion mirror, 16...
screen. 17.20 Half mirror 130 Monitor illumination optical system, 31 Focal plane, 32 Screen plate, 33 Transparent plate. Patent applicant: Asahi Optical Industry Co., Ltd. Agent: Kunio Miura Figure 1 Figure 4 Figure 5

Claims (5)

[Claims] (1) A projection optical system that projects an image of the developed film;
A special photography adapter for a video camera having a connection port for a video camera for capturing a projected film image, further comprising a monitor optical system capable of projecting a film image by the projection optical system, and a monitor optical system and the video camera. A video camera characterized in that an optical path conversion mirror or a half mirror for receiving a film image from the projection optical system is provided on either one of the camera connection port side or on both sides. Adapter for special photography. (2) A projection optical system capable of projecting an image of a developed film, a mirror for bending the optical path of this projection optical system, and a mirror provided in the optical path after the bending. The adapter for special photography of a video camera has a connection port for a video camera that captures the film image, and further has a monitor surface or (and) a projection surface that can project the film image by the projection optical system. In addition to providing a projection optical system, the mirror described in "-" is composed of a half mirror, and the half mirror is located at a position where the light of the projection optical system is directly input to the connection port of the video camera, and where the light of the projection optical system is directed to the connection port of the video camera. - An adapter for special photography of a video camera, characterized in that it is rotatable to a position where the light reflected by the projection surface is applied to the monitor/imprint optical system and enters the video camera connection port. (3) In claim 2, the monitor/imprint optical system is a special photography adapter for a video camera provided on the opposite side of the video camera connection port with respect to the /\-fmirror. (4) The adapter for special photography of a video camera according to claim 2, wherein the monitor and projection optical system is provided on the optical axis of the projection optical system passing through a nof mirror. (5) Any one of claims 2 to 4.
In this case, the monitor surface and the projection surface of the monitor/imprint optical system are on the same focal plane, and by selectively using a screen plate or a transparent plate, the monitor surface or the projection surface can be used for special shooting of a video camera. adapter for.