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:
Jun. 09, 2026
Filed:
Sep. 21, 2022
Largan Precision Co., Ltd., Taichung City, TW;
Pei-Chi Chang, Taichung City, TW;
Chien-Pang Chang, Taichung City, TW;
Yu-Chen Lai, Taichung City, TW;
Ming-Ta Chou, Taichung City, TW;
Wen-Yu Tsai, Taichung City, TW;
Kuo-Chiang Chu, Taichung City, TW;
LARGAN PRECISION CO., LTD., Taichung City, TW;
Abstract
An imaging optical system includes an infrared light absorbing element, an infrared light reducing film and a plate element in order along a paraxial path. The infrared light absorbing element is made of an infrared light absorbing plastic material, and the infrared light absorbing element is configured to refract a light. The infrared light reducing film is closer to an image surface of the imaging optical system than an incident surface of the infrared light absorbing element to the image surface of the imaging optical system. The plate element is disposed between the infrared light reducing film and the image surface, the plate element includes a translucent portion, a holder portion and a taper structure coating. The taper structure coating is disposed on at least one of an incident surface and an exit surface of the translucent portion.