Light spectrum detecting apparatus

Details Light spectrum detecting apparatus Light spectrum detecting apparatus

2005-02-22

2005-02-22

Font, Frank G. (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

C250S559110

Reexamination Certificate

active

06859274

ABSTRACT:
A light spectrum detecting apparatus according to the present invention comprises a photodetector (13) and a light transmitting plate (13b) covering a light receiving surface (13a) of the photodetector (13), and in the apparatus, a front surface S of the light transmitting plate13bis inclined and, among incidents lights, any light once reflected by a back surface T of the light transmitting plate (13b) travels thereafter, with being totally reflected by the front surface S and the back surface T of the light transmitting plate (13b), to a side surface13dof the light transmitting plate (13b). Any stray light can be prevented from entering the photodetector (13).

REFERENCES:
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patent: 4222667 (1980-09-01), Layne
patent: 4633078 (1986-12-01), Ferber
patent: 5543612 (1996-08-01), Kanaya et al.
patent: 5721614 (1998-02-01), Cerutti-Maori et al.
patent: 3941653 (1991-06-01), None
patent: 0 244 092 (1987-11-01), None
patent: 472448 (1937-09-01), None
Ichikawa Susumu, “Spectroscopic Device”, Patent Abstracts of Japan Publication No. 09250946, (Sep. 22, 1997).

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