Invention Grant
US07993018B2 Projection optical system and light amount adjusting component used in the same
有权
投影光学系统和光量调节组件中使用的相同
- Patent Title: Projection optical system and light amount adjusting component used in the same
- Patent Title (中): 投影光学系统和光量调节组件中使用的相同
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Application No.: US12369343Application Date: 2009-02-11
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Publication No.: US07993018B2Publication Date: 2011-08-09
- Inventor: Cheng-Kuei Chen , Chia-Chi Chung
- Applicant: Cheng-Kuei Chen , Chia-Chi Chung
- Applicant Address: TW Hsinchu
- Assignee: Coretronic Corporation
- Current Assignee: Coretronic Corporation
- Current Assignee Address: TW Hsinchu
- Agency: Muncy, Geissler, Olds & Lowe, PLLC
- Priority: TW97110296A 20080324
- Main IPC: G03B21/20
- IPC: G03B21/20
Abstract:
A light amount adjusting component adapted a projection optical system is provided. The light amount adjusting component has a light incident surface upon which a light beam impinges, and the light incident surface is provided with a surface structure for irregularly dispersing the light beam. A slot that permits the light beam to pass therethrough and enter a light-receiving element is formed on the light amount adjusting component, and a width of the slot changes along an extension direction of the slot to allow control of the amount of the light beam entering the light-receiving element when the light amount adjusting component moves or rotates.
Public/Granted literature
- US20090237626A1 PROJECTION OPTICAL SYSTEM AND LIGHT AMOUNT ADJUSTING COMPONENT USED IN THE SAME Public/Granted day:2009-09-24
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