Invention Grant
US08192033B2 Fixed-focus lens and apparatus integrating optical projection and image detection
有权
固定焦距透镜和集成光学投影和图像检测的设备
- Patent Title: Fixed-focus lens and apparatus integrating optical projection and image detection
- Patent Title (中): 固定焦距透镜和集成光学投影和图像检测的设备
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Application No.: US12559767Application Date: 2009-09-15
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Publication No.: US08192033B2Publication Date: 2012-06-05
- Inventor: Jung-Yao Chen , Hsin-Te Chen
- Applicant: Jung-Yao Chen , Hsin-Te Chen
- Applicant Address: TW Hsinchu
- Assignee: Young Optics Inc.
- Current Assignee: Young Optics Inc.
- Current Assignee Address: TW Hsinchu
- Agency: J.C. Patents
- Priority: TW98108048A 20090312
- Main IPC: G03B21/28
- IPC: G03B21/28
Abstract:
A fixed-focus lens disposed between an object side and an image side is provided. The fixed-focus lens includes a reflector, a curved reflector, a first lens group, and a second lens group disposed in sequence from the object side to the image side. The first lens group includes two aspheric lenses. The second lens group includes a spherical lens and an aspheric lens, wherein the aspheric lens of the second lens group is closest to the image side in the second lens group. Besides, an effective focal length (EFL) of the fixed-focus lens is f, an EFL of the second lens group is f2, and a clear aperture of the aspheric lens of the second lens group is D. The fixed-focus lens satisfies one of following conditions: 0.04
Public/Granted literature
- US20100231873A1 FIXED-FOCUS LENS AND APPARATUS INTEGRATING OPTICAL PROJECTION AND IMAGE DETECTION Public/Granted day:2010-09-16
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