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:
Dec. 17, 1996
Filed:
Mar. 18, 1994
G erard Corbasson, Saint-Heand, FR;
Jacques Debize, Saint-Heand, FR;
Etablissements Pierre Angenieux, Saint-Heand, FR;
Abstract
A lighting apparatus has a lighting filament (3), a first lens (1) disposed at a fixed distance from the filament (3), divergent light from the filament falling directly on the first lens (1) which reduces but does not eliminate the divergence of the light in all directions about the optical axis upon passage of light through the first lens, and a sleeve (12) carrying a second lens (2) mounted for sliding movement relative to the box. The second lens (2) receives divergent light directly from the first lens (1) and reduces the divergence of the light upon passage of the light through the second lens, the focal length of the second lens being greater than 1 1/2 times the focal length of the first lens and the distance between the lenses being less than 1 1/2 times the focal length of the first lens. The illumination pattern is high-intensity but does not have a sharp contour so that it may be used in a surgical operating room.