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. 19, 2001
Filed:
Oct. 25, 1999
Kazuhito Hayakawa, Hachioji, JP;
Yuji Kamo, Hino, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An image-forming optical system including a compact and high-performance prism optical system. The image-forming optical system has a prism member formed from a medium having a refractive index larger than 1. The prism member has a first transmitting surface, first to third reflecting surfaces, and a second transmitting surface. The second and third reflecting surfaces are arranged so that the path of the axial principal ray in the prism is folded in a triangular shape, and the axial principal ray incident on the second reflecting surface and the axial principal ray reflected from the third reflecting surface form intersecting optical paths. At least one of the first to third reflecting surfaces has a curved surface configuration that gives a power to a light beam. The curved surface configuration has a rotationally asymmetric surface configuration that corrects aberrations due to decentration.