Title: Method and apparatus for stabilizing holographic interference fringes by control apparatus
Application Number: 200610039967 Application Date: 2006.04.24
Publication Number: 1845017 Publication Date: 2006.10.11
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G03H1/04,G02B5/32
Applicant(s) Name: Soochow University Address: 215006
Inventor(s) Name: Li Chaoming, Wu Jianhong, Zhu Yayi, Ju Jianzhi, Hu
Attorney & Agent: sun fangwei
Abstract:
     The invention relates to a method for using one controller to stabilizing the holographic interference pattern, and relative device. The external disturbance will cause the random excursion of holographic interference pattern, to reduce the quality of shot holographic grating. The invention uses linear CCD to collect the interference pattern information to the controller; the controller calculates the stripe excursion and control the piezoelectric ceramic that connected to the reflector to move and process phase compensation, to reduce the excursion of interference strip, and stabilize the interference strip in exposal area, therefore, the exposal time can be prolonged significantly.
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