发明名称 Image pickup device with index signal generator
摘要 An image pickup device comprises an image pickup tube and an index generator having a light shield box; a light emitting diode held in the light shield box; a stripe screen provided on the photosensitive layer of the image pickup tube and shading compensation filter having transmittance pattern which equalizes illuminance variation on the stripe pattern of the stripe screen caused by the light emitting diode so that illuminance at any point of the stripe pattern becomes uniform. The image pickup tube generates picture signal together with index signal which is derived from the projected stripe pattern image on peripheral portion of the photosensitive layer through the shading compensation filter which equalizes index signal output level to make timing derived from the index signal accurate. A method of providing shading compensation filter is disclosed where a sheet of negative film is placed on the opening of the light shield box, exposed to the light emitting diode. Then the sheet of film is developed by chemical process.
申请公布号 US4897730(A) 申请公布日期 1990.01.30
申请号 US19880239292 申请日期 1988.09.01
申请人 VICTOR COMPANY OF JAPAN, LTD. 发明人 IWAHARA, MAKOTO;TAKANASHI, ITSUO;NAKAGAKI, SHINTARO;ICHIMURA, HIROSHI;NEGISHI, ICHIRO;OSADA, MASARU;KATASE, WATARU
分类号 H04N5/228;H04N5/335;H04N9/077 主分类号 H04N5/228
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