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. 30, 2025
Filed:
Mar. 11, 2024
National Central University, Taoyuan, TW;
Wen-Kai Lin, Taoyuan, TW;
Shao-Kui Zhou, Taoyuan, TW;
Wei-Chia Su, Taoyuan, TW;
Ching-Cherng Sun, Taoyuan, TW;
Shiuan-Huei Lin, Taoyuan, TW;
Yeh-Wei Yu, Taoyuan, TW;
Tsung-Hsun Yang, Taoyuan, TW;
NATIONAL CENTRAL UNIVERSITY, Taoyuan, TW;
Abstract
A spectrometer system with a volume holographic light guide element includes two focusing lenses in addition to the volume holographic light guide element, which has a light guide element and two volume holographic elements. The first focusing lens receives the light emitted by a to-be-tested light source at a first focal plane of the first focusing lens and makes the light converge and form plural collimated light beams that are projected to, and diffracted and coupled into the light guide element by, the first volume holographic element, are then received and coupled out of the light guide element by the second volume holographic element, and are subsequently received and focused on a sensing element by the second focusing lens. Each collimated light beam enters and exits the light guide element at the same angle. The spectrometer system can measure the intensity/chromatic uniformity of a relatively weak point/surface light source efficiently.