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:
May. 30, 1978
Filed:
Jul. 12, 1976
Applicant:
Inventors:
Yoshio Fukuda, Kyoto, JA;
Jugoro Suzuki, Kyoto, JA;
Toshiaki Fukuma, Kyoto, JA;
Michinosuke Takada, Kyoto, JA;
Assignee:
Shimadzu Seisakusho Ltd., Kyoto, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01V / ; H01V / ;
U.S. Cl.
CPC ...
356 88 ; 2502 / ; 356179 ; 356205 ;
Abstract
A spectrophotometer comprising means for producing electrical signals Er and Es corresponding to reference and measuring beams, respectively; means for multiplying the value Es by a factor k to produce an electrical signal corresponding to the value kEs; means for controlling said signal producing means so as to keep the value (Er + kEs) constant; and means for producing an electrical signal corresponding to the value (Er - kEs), whereby minute changes of the absorbance of a sample can be accurately measured without logarithmic conversion.