JP2542200Y2 - Imaging equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographing apparatus which can be used not only for observing and monitoring the natural world, artificial moldings and structures, or the progress of surgery, but also for recording various events. .

[0002]

2. Description of the Related Art Conventionally, a television camera has been set behind an eyepiece of a finder of a still camera such as a single-lens reflex camera for observing and monitoring the natural world and artificial moldings / artifacts and the like. The photographed viewfinder image is re-photographed with a TV camera, and the camera is remotely operated while viewing the image on the screen of a CRT to observe the natural world, artificial moldings / artifacts, dangerous materials, and in some cases, the progress of surgery, etc. Monitor, record various events, etc.
A method of taking a picture with a still camera at any time has been generally adopted.

[0003]

As described above, in the conventional photographing method, a still camera such as a single-lens reflex camera and a television camera are separated from each other, and a finder image of the still camera is photographed again by the television camera. Related to CRT
The image projected on the screen is extremely unclear, and vignetting may occur at the four corners, so that not only is there an unavoidable disadvantage that recording by a VTR is almost impossible, but also the device itself becomes large, The weight is more than doubled, and there is an inconvenience that handling becomes difficult.

[0004] In addition, in the conventional photographing method as described above, at the time of photographing with a still camera such as a single-lens reflex camera, a video image is formed by the operation of a reflecting mirror for changing an optical path to a finder installed in the camera body. There was an unavoidable difficulty of disappearing momentarily.

As a means for avoiding this difficulty, even if a fixed half mirror system is adopted in place of the reversing reflecting mirror, the phenomenon that the video image is instantaneously underexposed during filming is avoided. I didn't get it.

However, since the above phenomenon is very instantaneous, it is easy for a professional class holding the editing equipment to easily remove and correct the editing equipment during the editing process. It was impossible for a general amateur who did not have one.

An object of the present invention is to provide a photographing apparatus which does not induce the disadvantages or phenomena of the former as well as the disadvantages and phenomena of the latter.

[0008]

In order to achieve the above-mentioned object, a photographing apparatus according to the present invention includes a finder lens in place of a finder unit in a twin-lens reflex camera as a still camera. A condenser lens for condensing the light beam imaged by the system, the condenser lens and the optical axis are matched, and the diameter is not smaller than the effective aperture of the condenser lens,
In addition, a photoelectric conversion unit incorporating a relay lens system for obtaining an image similar to the image on the film side, and a photoelectric conversion TV sensor for converting a finder aerial image formed by the relay lens system into an electric signal is mounted. On the other hand, the present invention is characterized in that the electric signal from the photoelectric converter section is input as a video signal to a CRT, VTR, CD or the like via a preamplifier or a central control circuit.

[0009]

Since the photographing apparatus according to the present invention is constructed as described above, the light beam which is formed by the finder lens system and forms an aerial image is condensed without leakage by the condenser lens. The light beam condensed without leakage is guided without leakage into the relay lens system having a diameter smaller than the effective aperture of the condenser lens, and is transmitted on the photoelectric conversion TV sensor by the relay lens system and on the film surface by the photographing lens system. An aerial image similar to an aerial image formed on a finder without vignetting and having no change in brightness even when photographing on a film is formed.

[0010] Then, photoelectric conversion is performed by a photoelectric conversion TV sensor, and the output signal is input to a CRT, VTR, CD, or the like via a preamplifier or a central control circuit, and is displayed on a screen of the CRT, and is displayed on the CRT. Observe and monitor the image, and if necessary,
Record in R or shoot the subject directly on the film.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a photographing apparatus according to the present invention.

In the figure, X is a twin-lens reflex camera as a still camera, A is a camera body of the twin-lens reflex camera X, B
Is a photoelectric converter unit constructed according to the present invention so as to be replaceable with a conventional finder unit in a twin-lens reflex camera, and F is a film as a photographic photosensitive material.

In the camera body section A, 1 is a photographic lens system provided on the front surface of the camera body section A;
2 is a loading section of the film F, 3 is a winding section of the film F,
Reference numeral 4 denotes a photographing unit for the film F, reference numeral 11 denotes a finder lens system, and reference numeral 12 denotes a reflection mirror. These members are exactly the same as those of the conventional twin-lens reflex configuration. The camera body A is also provided with a shutter, a shutter drive mechanism, and the like, not shown.

Now, in the photoelectric converter section B constituted by the present invention, reference numeral 13 denotes a finder lens system 1.
1, a condenser lens installed in place of the conventional focusing screen in the finder unit disposed near the image forming position of the aerial image, 14 ₁ , 14 ₂ , and 14 ₃ are reflection mirrors;
15 is a relay lens system, 16 is a photoelectric conversion TV sensor such as a solid-state imaging device or an imaging tube for converting an aerial image into an electric signal,
Reference numeral 17 denotes a connection cord to a portable preamplifier 20 or a central control circuit or the like (not shown) connected to a VTR 30 or a CRT 40 (not shown).
Numeral 5 has an effective aperture not smaller than the effective aperture of the condenser lens 13, the optical axis of the condenser lens 13 is matched with the optical axis, and an image is formed on the lower surface of the condenser lens 13 by a finder lens system. Focused aerial image, that is, an aerial image exactly the same as the aerial image formed on the surface of the film F, is reduced or enlarged with the same shape and brightness as it is, and formed on the photoelectric conversion TV sensor 16. It is provided for use.

The photographing device constructed according to the present invention is:
With the configuration described above, when performing observation, monitoring, and photographing, the photoelectric converter unit B configured according to the present invention is mounted instead of the conventional finder unit in the twin-lens reflex camera X. For example, the light beam that is guided from the finder lens system 11 to the reflection mirror 12 in the camera body A and the condenser lens 13 where the photoelectric converter B is attached, and forms an aerial image near the condenser lens 13 is condensed. The light is condensed by the lens 13 and is guided to the relay lens system 15 which is not smaller than the effective aperture of the condenser lens 13 via the reflection mirrors 14 ₁ , 14 ₂ , 14 _3. It is similar to the aerial image formed on the surface of the film F on the A side and has no vignetting. The aerial image without change so that the allowed to an image on the photoelectric conversion TV sensor 16.

The photoelectric conversion corresponding to the formed aerial image is performed by the photoelectric conversion TV sensor 16, and the output signal of the photoelectric conversion TV sensor 16 is connected to the connection cord 17 by a portable preamplifier 20 (not shown). Alternatively, the VTR 30 and the CRT 4 are sent to the central control circuit as video signals from the portable preamplifier 20 or the central control circuit.
0 (see Japanese Utility Model Publication No. 4-32851 and Japanese Utility Model Publication No. 5-22922) filed by the applicant of the present utility model registration applicant.

On the other hand, the fact that the photographing operation on the film F can be performed at any time when required is completely equivalent to the conventional twin-lens reflex camera.

[0018]

As is apparent from the above description, since the photographing apparatus according to the present invention is configured as described above, it has the following effects.

Since the photographing device according to the present invention has a photoelectric conversion unit mounted on a finder mounting portion of a twin-lens reflex camera, the television device is separately provided behind the eyepiece of the conventional single-lens reflex finder. Unlike a camera and the like, the structure is small and light, and handling is easy.

Further, since the photographing device according to the present invention converts an aerial image into an electric signal by a photoelectric conversion TV sensor of a photoelectric converter section, a conventional finder image is converted into a television camera through an eyepiece of a single-lens reflex camera. Compared with the simultaneous shooting method, the image projected on the screen of the CRT is particularly clear, there is no vignetting, it is similar to the image formed on the film surface, and it is possible to record with a VTR. It is also possible to directly shoot the subject.

The most distinctive feature of the photographing apparatus according to the present invention is not limited to the above-mentioned conventional single-lens reflex still camera, but the actual application filed by the applicant of the present invention, which has improved the above-mentioned still camera. No. 62-35871 (4-3)
No. 2851) and Japanese Utility Model Application No. Sho 62-50598 (Japanese Utility Model Application Publication No. 5-22922), the video image is instantaneous because there is no change in the amount of light to the photoelectric conversion TV sensor even when shooting on a film surface with a still camera. Without continuous disappearance or underexposure, a continuous image can be obtained without any special editing work. -It is possible to declare that it is the most suitable imaging device for observing and monitoring the creations, dangerous materials, and the progress of the operation, or recording various events.

[Brief description of the drawings]

FIG. 1 is a schematic diagram for explaining a main configuration of an embodiment of a photographing apparatus according to the present invention.

[Explanation of symbols]

X twin-lens reflex camera A camera body 1 photographing lens system 2 film F loading section 3 film F winding section 4 film F photographing section 11 finder lens system 12 reflection mirror B photoelectric converter section 13 condenser lens 14 ₁ , 14 ₂ , 14 ₃ Reflecting mirror 15 Relay lens system 16 Photoelectric conversion TV sensor 17 Connection cord 20 Portable preamplifier 30 VTR 40 CRT

Claims (1)

(57) [Scope of request for utility model registration] 1. A condenser lens for condensing a light beam focused by a finder lens system instead of the finder at a mounting position of a finder in a twin-lens reflex camera as a still camera; The optical axis is matched, the diameter is not smaller than the effective aperture of the condenser lens, and a relay lens system that obtains an image similar to the image on the film side, and a finder aerial image formed by the relay lens system are formed. A photoelectric conversion unit incorporating a photoelectric conversion TV sensor for converting into an electric signal is mounted, and an electric signal from the photoelectric conversion unit is input as a video signal to a CRT, VTR, CD or the like via a preamplifier or a central control circuit. An imaging device, comprising: