Invention Grant
US09348122B2 Projection lens including first lens group and second lens group and projection device including planar reflector
有权
投影透镜，包括第一透镜组和第二透镜组以及包括平面反射器的投影装置
- Patent Title: Projection lens including first lens group and second lens group and projection device including planar reflector
- Patent Title (中): 投影透镜，包括第一透镜组和第二透镜组以及包括平面反射器的投影装置
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Application No.: US13649113Application Date: 2012-10-11
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Publication No.: US09348122B2Publication Date: 2016-05-24
- Inventor: Hsin-Hung Lin , Yi-Hsueh Chen , Chao-Shun Chen
- Applicant: Hsin-Hung Lin , Yi-Hsueh Chen , Chao-Shun Chen
- Applicant Address: TW Hsinchu
- Assignee: Young Optics Inc.
- Current Assignee: Young Optics Inc.
- Current Assignee Address: TW Hsinchu
- Agency: Jianq Chyun IP Office
- Priority: CN201210052795 20120302
- Main IPC: G03B21/28
- IPC: G03B21/28 ; G02B13/18 ; G02B13/16 ; G02B17/08 ; G03B21/14 ; G02B9/64
Abstract:
A projection lens provided is for projecting an image beam. The projection lens is disposed on a transmission path of the image beam and includes a first group of lenses and a second group of lenses. The first group of lenses includes a first spherical lens and a first aspheric lens. After the image beam passes through the first group of lenses, an intermediate image is formed between the first group of lenses and the second group of lenses, in which the first aspheric lens is the lens in the first group of lenses closest to the second group of lenses. A projection device using the projection lens is also provided. The projection device further includes a planar reflector on the transmission path of the image beam.
Public/Granted literature
- US20130229635A1 PROJECTION LENS AND PROJECTION DEVICE Public/Granted day:2013-09-05
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