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:
Dec. 12, 2017
Filed:
Aug. 06, 2015
Screen Holdings Co., Ltd., Kyoto, JP;
Yuki Ashida, Kyoto, JP;
SCREEN HOLDINGS CO., LTD., Tokyo, JP;
Abstract
Laser light from a light source part is guided to an irradiation plane by an irradiation optical system. In the irradiation optical system, element lenses are arrayed, and light fluxes that have passed through the element lenses respectively enter transparent elements. Irradiation regions of the light from the element lenses are superimposed on the irradiation plane. When each pair of adjacent target element lenses out of three target element lenses arrayed sequentially is regarded as a target element lens pair, the optical path lengths of three transparent elements corresponding to the three target element lenses are determined such that a peak position of light intensity on the irradiation plane resulting from the interference between the light fluxes through one target element lens pair is different from that corresponding to the other pair. This suppresses variations in light intensity caused by interference between the light fluxes on the irradiation plane.