# US 5,347,396 A · Photovideo camera

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- Number: US 5,347,396 A
- Document ID: US5347396A
- Status: Granted
- Kind: A
- Application number: 08/164,679
- Filed: 1993-12-09
- Granted: 1994-09-13
- Earliest claimed: 1991-01-16
- Assignees: Sony Corporation
- Inventors: Toshio Tomiyoshi; Tetsuya Yagi; Masami Torizuka; Kenichi Hamano; Mitsuru Hachiya; Motoshi Mizoguchi
- Web page: https://patentgrep.com/patent/US5347396A

## CPC

- G02B 7/10: by relative axial movement of several lenses, e.g. of varifocal objective lens
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A photovideo camera takes visual images formed on negative films and/or positive films to obtain video signals corresponding to the visual images. The camera unit of the photovideo camera can be focused after determining a desired angle of view by zooming, without changing the desired angle of view. In focusing the lens unit, only the master lens of the focusing lens system of the lens unit is moved.

## Claims

### Claim 1

A photovideo camera for providing an image signal corresponding to a visible image formed on a developed film comprising:
a film stage for supporting the film;
a main unit containing a lens unit for causing the visible image of the developed film to fall on a solid-state pickup device and electric circuits connected thereto for producing the image signal;
said lens unit comprising a lens barrel, a front lens fixedly held in said lens barrel at a lower end thereof, a zoom lens system held in said lens barrel above said front lens, and a relay lens system held in said lens barrel above said zoom lens system,
said relay lens system comprising a front component lens fixedly held in the lens barrel, a rear component lens fixedly held in the upper end of said lens barrel, whereby a focus of the visible image on the solid-state pickup device is achieved without affecting a magnification factor of said zoom lens system; and
a column supporting said main unit so that a selected distance is provided between said film stage and the lens surface of said main unit.

### Claim 2 (depends on 1)

A photovideo camera according to claim 1, wherein the image pickup means is a solid-state pickup device.

### Claim 3 (depends on 2)

A photovideo camera according to claim 2, wherein the solid-state pickup device is a charge coupled device.

### Claim 4 (depends on 1)

A photovideo camera according to claim 1, wherein the lens unit includes a zoom lens system.

### Claim 5 (depends on 4)

A photovideo camera according to claim 4, wherein the zoom lens system comprises a variator and a compensator.

### Claim 6 (depends on 1)

A photovideo camera according to claim 1, wherein the developed film is held between holding elements of a film holder, and the film holder is guided by a guide formed in the film stage.

### Claim 7 (depends on 2)

A photovideo camera according to claim 2, further comprising means for rotating, whereby the solid-state pickup device can be turned in a fixed range in a plane parallel to the focal plane thereof.