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. 08, 2013
Filed:
Jun. 25, 2010
Norifumi Nakagawa, Tokyo, JP;
Norifumi Nakagawa, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
There is provided a lighting apparatus that is capable of accurately measuring the temperature of an optical member that transmits therethrough light emitted from a light source without blocking the optical path of the light. A lighting apparatus including: a light source that emits light, an optical member that transmits therethrough the light emitted from the light source, a temperature measuring section that measures a temperature of a first measurement point on the optical member, a storing section that stores therein profile information representing a correlation between the temperature of the first measurement point and a temperature of a second measurement point, where the second measurement point is on the optical member and separated away from the first measurement point, and a temperature determining section that determines the temperature of second measurement point based on the temperature of the first measurement point measured by the temperature measuring section and the profile information stored in the storing section.