Canon Kabushiki Kaisha

Mutsuhiro Inoue

Tetsuro Kuwayama

Yu Yamada

Toshio Arai

Hiroaki Suzuki

Kokichi Omi

Akira Konno

Yukio Izaka

Keiichi Uno

This invention presents a film reader equipped with a reflecting type screen, which is arranged in a housing of the reader and has a number of ring strip surfaces having different inclination angles and arranged concentrically. The common center of the ring strip surfaces is deviated from the center of the screen and locates outside of the screen and the end of the screen nearest to the common center is placed near to an observing aperture in the housing. A light source for illuminating a microfilm having recorded images and an optical system for projecting the image of the illuminated film to the screen are provided. Further, the screen is formed by one synthetic resin or preferably at least two kinds of synthetic resins having different refractive indices and mutually non-soluble property. A reflecting substance may be mixed with said resins.

Film reader

This invention presents a film reader equipped with a reflecting type screen, which is arranged in a housing of the reader and has a number of ring strip surfaces having different inclination angles and arranged concentrically. The common center of the ring strip surfaces is deviated from the center of the screen and located outside of the screen, and the end of the screen nearest to the common center is placed near an observing aperture in the housing. A light source for illuminating a microfilm having recorded images and an optical system for projecting the image of the illuminated film to the screen are provided. Further, the screen is formed by one synthetic resin or preferably at least two kinds of synthetic resins having different refractive indices and mutually nonsoluble property. A reflecting substance may be mixed with said resins.

A film reader, including an irradiator for the film on which information is recorded, an optical system for projecting the information recorded on the film, an information storage body having an electrocromic substance, which changes color when a voltage is applied thereto, mounted between a pair of electrodes for recording and erasing information projected by the optical system, the whole area of the information storage body being irradiated with light.

An automatic information searching arrangement for searching desired image information from a record web having image information and searching marks placed thereon. The present invention provides scanning device which incorporates therein a light source and an image pickup tube or a flying spot cathode-ray tube and a photoelectric converter to convert it into an electric signal in time series. The blip zone in the record web is projected by the scanning device to convert it into an electric signal in time series whereby a desired information frame may automatically be searched. The information searching device comprises a unit for feeding a record web, a unit for scanning searching marks, a unit for forming one count signal from a plurality of mark signals generated from the scanning unit, and a conrol unit for generating a signal for controlling the feed of the record web. The record web may accurately be positioned by the arrangement of the present invention.

Growing community of inventors

Sagamihara, Japan

Mutsuhiro Inoue