发明名称 |
Film detection apparatus |
摘要 |
Apparatus for detecting the presence of processed photograph film at a particular location comprises a light source which emits green or blue light having a wavelength in the range of 420-600 nanometers. A light sensors positioned to receive light from the light source when the film is not present. An infrared filter and a filter for transmitting light in the range of wavelengths emitted by the light source are positioned in front of the light sensor.
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申请公布号 |
US4967094(A) |
申请公布日期 |
1990.10.30 |
申请号 |
US19890305832 |
申请日期 |
1989.02.02 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
HORTON, ROBERT L.;BACKUS, RICHARD J. |
分类号 |
G03B1/00;B65H7/14;G03B27/32;G03B27/46;G03B27/62;G03D13/00 |
主分类号 |
G03B1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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