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:
Apr. 14, 2020
Filed:
Sep. 15, 2017
Applicant:
Precision Optics Corporation, Inc., Gardner, MA (US);
Inventors:
Brian E. Volk, Jefferson, MA (US);
Joseph N. Forkey, Princeton, MA (US);
Assignee:
Precision Optics Corporation, Inc., Gardner, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 23/24 (2006.01);
U.S. Cl.
CPC ...
G02B 23/243 (2013.01); G02B 23/2484 (2013.01);
Abstract
An objective element for use in an endoscope is provided. The objective element comprises a flat glass plate that is in contact with the plano side of a plano-convex lens. The side of the flat glass plate in contact with the plano-convex lens is coated with an opaque material other than an aperture that is in line with the axis of the plano-convex lens. Alternatively, the plano side of a plano-convex lens may be coated with an opaque material other than an aperture that is in line with the axis of the plano-convex lens.