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:
Apr. 01, 2003
Filed:
Jul. 02, 1999
Ichirou Miyagawa, Minamiashigara, JP;
Hirofumi Saita, Minamiashigara, JP;
Fuji Photo Film Co., Ltd., Kanagawa-Ken, JP;
Abstract
A laser beam emitted from a semiconductor laser is guided to a sensitive recording medium on a drum by a focusing optical system and an optical anisotropic element. The optical anisotropic element separates the laser beam along its optical axis to produce a laser beam having two focused positions for thereby increasing the depth of focus. With the increased depth of focus, it is possible to record a highly accurate image on the sensitive recording medium even if the sensitive recording medium is displaced because the drum has its outer circumferential surface not concentric with its axis or the sensitive recording medium is lifted off the drum.