发明名称 |
Optical device, image reading device, and filter manufacturing method |
摘要 |
A light emitting element has spectral characteristics in a predetermined optical wavelength range. A photodetecting unit includes a photodetecting element capable of detecting a light in the optical wavelength range and performs an OE conversion of either one of a reflected light and transmitted light from a scanning target. A filter unit is arranged in an optical path from the light emitting element to the photodetecting element via the scanning target and having an optical transmission range within the optical wavelength range and covering a range of variation in the optical wavelength range.
|
申请公布号 |
US7893394(B2) |
申请公布日期 |
2011.02.22 |
申请号 |
US20080289856 |
申请日期 |
2008.11.06 |
申请人 |
RICOH COMPANY LIMITED |
发明人 |
TOKUNAGA ATSUO |
分类号 |
G01J3/50;G03G15/01;H01L27/00;H04N1/04 |
主分类号 |
G01J3/50 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|