Invention Grant
- Patent Title: Optical sensing methods and apparatus
- Patent Title (中): 光学感应方法和装置
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Application No.: US11730055Application Date: 2007-03-29
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Publication No.: US07671972B2Publication Date: 2010-03-02
- Inventor: Kwok Sing Cheng , Ho Shan Ng , Lai Man Chau , Yeung Ming Chow , Tao Tao
- Applicant: Kwok Sing Cheng , Ho Shan Ng , Lai Man Chau , Yeung Ming Chow , Tao Tao
- Applicant Address: CN Hong Kong SAR
- Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
- Current Assignee: Hong Kong Applied Science and Technology Research Institute Co., Ltd.
- Current Assignee Address: CN Hong Kong SAR
- Agency: Buchanan Ingersoll & Rooney PC
- Main IPC: G01P3/36
- IPC: G01P3/36
Abstract:
A method of sensing movement or proximity of objects by optical reflection is provided. The method includes the steps of transmitting a train of optical pulses towards a destination, sensing optical pulses reflected from the destination, and sensing and evaluating movement or proximity characteristics of objects at the destination with reference to variation in pulse width between transmitted and reflected optical pulses.
Public/Granted literature
- US20080239325A1 Optical sensing methods and apparatus Public/Granted day:2008-10-02
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