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:
Mar. 25, 2025
Filed:
May. 30, 2022
Ushio Denki Kabushiki Kaisha, Tokyo, JP;
Tomonori Yoshida, Tokyo, JP;
Takahiro Inoue, Tokyo, JP;
Ushio Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical heating apparatus includes a supporter on which a workpiece is placed and a plurality of light source units each including an LED substrate on which multiple LED elements are mounted. A first main surface of the LED substrate fails to be parallel to a second main surface of the workpiece. Each of the light source units is arranged to satisfy the following formula: 2 tan 2θ/cos θ≥D/D, where θ is an angle formed by the first main surface and the second main surface, Dis a separation distance between a first LED element and the workpiece, Dis a separation distance between the first LED element and a second LED element, the first LED element being closest to the second main surface in a normal direction thereof, and the second LED element being farthest to the second main surface in the normal direction thereof.