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:
Jan. 31, 1978
Filed:
May. 14, 1976
Konishiroku Photo Industry Co., Ltd., Tokyo, JA;
Abstract
In a transmittance densitometer comprising a sample stage with a central measuring light path passing therethrough which is illuminated interiorly, there are provided a semi-transparent illumination plate provided for the sample stage, the semi-transparent illumination plate surrounding the measuring light path and capable of diffusing transmission light, and a local illumination chamber disposed beneath the illumination plate, the chamber optically isolated from illumination light directing to the measuring light path and the sample stage, whereby an illumination lamp disposed interiorly of the local illumination chamber is turned on under the control of the level of an ambient light shielding cylinder which partially defines the measuring light path.