中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Image exposure device

文献类型:专利

作者OKINO YOSHIHARU
发表日期1990-05-17
专利号JP1990129625A
著作权人FUJI PHOTO FILM CO LTD
国家日本
文献子类发明申请
其他题名Image exposure device
英文摘要PURPOSE:To precisely control light quantity by a simple constitution by providing a step wedge filter that is formed to switch stepwise the density deciding a light transmissive quantity on an optical path of different wavelength and controlling light transmissive quantity. CONSTITUTION:The step wedge filter 4 is arranged on the optical path of a laser beam 3. This step wedge filter 4 has a construction that color density is separated into 3 stages, for example, 4a-4c and a filter driving circuit 5 changes the light transmissive quantity at the three stages digitally. The laser beam passing through the step wedge filter 4 is detected by an SOS sensor 6. A photoelectrically converted detector signal V2 is impressed on a sample-hole circuit 7 and the level of the detector signal V2 is maintained in prescribed time. The detector signal V2 is supplied to a driving circuit 1 and the quantity of light from a laser diode 2 is controlled correctly. Thereby, the quantity of light from a power source is controlled by the simple and inexpensive construction.
公开日期1990-05-17
申请日期1988-11-09
状态失效
源URL[http://ir.opt.ac.cn/handle/181661/59593]  
专题半导体激光器专利数据库
作者单位FUJI PHOTO FILM CO LTD
推荐引用方式
GB/T 7714
OKINO YOSHIHARU. Image exposure device. JP1990129625A. 1990-05-17.

入库方式: OAI收割

来源:西安光学精密机械研究所

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