Invention Grant
- Patent Title: Imaging optical system and image-acquisition apparatus
- Patent Title (中): 成像光学系统和图像采集装置
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Application No.: US13307540Application Date: 2011-11-30
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Publication No.: US08331041B2Publication Date: 2012-12-11
- Inventor: Masahiro Katakura , Hideyasu Takato , Yuji Kamo
- Applicant: Masahiro Katakura , Hideyasu Takato , Yuji Kamo
- Applicant Address: JP Tokyo
- Assignee: Olympus Medical Systems Corp.
- Current Assignee: Olympus Medical Systems Corp.
- Current Assignee Address: JP Tokyo
- Agency: Scully, Scott, Murphy & Presser, P.C.
- Priority: JP2010-122845 20100528
- Main IPC: G02B13/04
- IPC: G02B13/04
Abstract:
Provided is an imaging optical system and an image acquisition apparatus that can be suitably used in a small-diameter endoscope while having an ultra-wide angle of view. Provided is an image optical system (1) containing, in order from the object side, a negative front group (FG), an aperture stop (S), and a positive back group (BG), wherein the front group (FG) contains, in order from the object side, a negative first lens (L1) and a negative second lens (L2), and the back group (BG) contains a cemented lens (CL) constituted of at least three lenses (L5, L6, L7) joined together.
Public/Granted literature
- US20120133802A1 IMAGING OPTICAL SYSTEM AND IMAGE-ACQUISTION APPARATUS Public/Granted day:2012-05-31
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