发明名称 |
Darkroom illumination equipment |
摘要 |
A casing of darkroom illumination equipment is composed of a base assembly and a lid. A substrate mounting light emitting diodes, a milky colored plate, a filter and a transparent plate are placed in the casing. The light emitting diode which emits the light for which spectrum has its peak at the wavelength of 585 nm is used so as not to affect photographic color paper. The filter eliminates the light having wavelengths in the lower slope apart from the peak in the spectrum and allows only the light having the wavelengths at the peak and in the proximity of the peak to pass through.
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申请公布号 |
US6142647(A) |
申请公布日期 |
2000.11.07 |
申请号 |
US19970892905 |
申请日期 |
1997.07.15 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
HAYAKAWA, HIROSHI |
分类号 |
G03D13/00;F21V9/00;G03D17/00;(IPC1-7):F21V9/00 |
主分类号 |
G03D13/00 |
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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