Konishiroku Photo Industry Co., Ltd.

Konishiroku Photo Ind. Co., Ltd.

Satoru Hohnishi

Kaoru Onodera

Kazuo Shiozawa

Kazuyuki Kobayashi

Takao Abe

There is presented an optical screen suitable for taking a picture by placing it between the object and a photosensitive material. The optical screen has a specific means for controlling the difference in transmission density in an optically heterogeneous pattern and/or the specific area of the lower transmission density portions, typically an electrochromic display device. By use of such a single optical screen having a variable optically heterogeneous pattern, cumbersome operations for displacing one screen for another in the prior art can be obviated.

Photographic screen

In a photographic device, there are provided (a) a means for measuring luminous intensity distribution on an object and (b) a screen means for controlling gradation of an image to be formed on a photosensitive material in accordance with the luminous intensity distribution and/or maximum/minimum luminous intensity difference of the object measured by the means (a).

Photographic device with screen for controlling gradation of

A direct positive type light sensitive silver halide photographic material is disclosed. At least one layer containing an unfogged internal latent image type silver halide emulsion, is provided on a support, and an internal latent image type silver halide emulsion having fog centers in silver halide grains, is incorporated in said layer or in another constituent layer of the photographic material. A dye image forming substance may be incorporated in the same layer or in a separate layer to form a color diffusion transfer type light sensitive photograhic material. The photographic materials present a positive image having a high maximum density and a low minimum density.

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Hino, Japan

Satoru Hohnishi