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. 23, 2013
Filed:
Mar. 01, 2010
Keiko Yamada, Sakai, JP;
Keiko Yamada, Sakai, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
An image pickup optical system OP includes first and second prisms P, Pfor bending incident light at an almost right angle. Optical axis AX at the incident surface of first prism Pand optical axis AX at the outgoing surface of second prism Pare almost parallel with each other. There is a lens element forming at least one power group on the optical path between first and second prisms P, P, wherein a power group closest to the incident surface of second prism Pis a positive power group. The incident surface of second prism Phas a concaved surface shape facing the object side, and the following conditional expressions are satisfied: −4.2<fp2/f<−0.2 (fp2: a focal length of the second prism, f: is a focal length of the entire image pickup optical system), and 0.2<|f_1p/fp2|<1.5 (f_1p: a focal length of the power group closest to the incident surface of the second prism).