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:
Sep. 05, 1978
Filed:
Dec. 09, 1974
Applicant:
Inventors:
Henry H Blau, Jr, Wayland, MA (US);
Paul L Kebabian, Somerville, MA (US);
Assignee:
Environmental Research & Technology, Inc., Concord, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264-1 ; 264 56 ; 427146 ;
Abstract
A method of making a light equalizer comprises the steps of mixing two different powdered crystalline materials, each of a slightly different index of refraction so as to provide scattering of selected wavelengths of light. The materials are compacted under pressure to form an integral body containing a plurality of light scattering centers. The exterior surfaces of the body are covered with a reflective coating except for two opposite ends through which the selected wavelengths of light can be transmitted so as to provide a substantially uniform distribution of light at its output.