The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 1995
Filed:
Feb. 16, 1994
Applicant:
Inventor:
Yoichi Harada, Tokyo, JP;
Assignee:
Seiko Instruments Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ; G01J / ;
U.S. Cl.
CPC ...
356328 ; 356300 ;
Abstract
A wavelength sub-dispersive device receives light from a standard light source producing light having a narrow bandwidth and having an intensity greater than that of light to be detected. The sub-dispersive device is provided for identifying the wavelength of the dispersed light by a main dispersive device, which is detected by a main detector. Light from the standard light source does not irradiate the main detector. If the main detector is irradiated with the light from the standard light source, the detection of the main detector is disturbed by its high intensity.