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. 28, 1997
Filed:
Oct. 18, 1995
Linden J Livoni, Los Gatos, CA (US);
Lumisys, Inc., Sunnyvale, CA (US);
Abstract
A hollow light collector has an internal surface coated with a wavelength selective coating to absorb light energy within a predefined range of wavelengths and reflect all other light energy. In the preferred embodiment, the light collector is cylindrical in shape and includes an entrance aperture extending along the longitudinal axis of the collector. An exit aperture is disposed opposite to, and is coextensive with, the entrance aperture, defining a beam path therebetween to allow a scanning beam to traverse the chamber. A detector, such as a photomultiplier tube, is in optical communication with the chamber and is disposed off the beam path to detect light reflecting from the coating. In other embodiments, the chamber of the hollow collector may be spherical or ellipsoidal in shape.