Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Light polarizing article or holographic article
Reexamination Certificate
2007-09-27
2009-06-02
Gilliam, Barbara L (Department: 4191)
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Light polarizing article or holographic article
C356S127000, C264S040100, C264S002500
Reexamination Certificate
active
07540982
ABSTRACT:
A molding lens with indentations for measuring eccentricity and a method for measuring eccentricity thereof are disclosed. At least one indentation concentric with an optical surface is respectively disposed on a front plane and a rear plane of the molding lens on area outside the optical surface while the indentation is observed by means of a measuring microscope. Moreover, the eccentricity of the molding lens is detected by eccentricity test function of the measuring microscope and the eccentric direction is defined so as to modify the lens mould and replace conventional eccentricity test that uses a transmission eccentric scale indicator in combination with a jig. Thus the cost of test equipment is reduced, test procedure is simplified and efficiency of mould modification is improved. Therefore, it's more convenient to manage manufacturing of the lens.
REFERENCES:
patent: 4537732 (1985-08-01), Ueda et al.
patent: 5298096 (1994-03-01), Yoshino et al.
Huang Chih-Hsiung
Shyu San-Woei
Wang Chi-Hsiung
E-Pin Optical Industry Co., Ltd.
Gilliam Barbara L
Muncy Geissler Olds & Lowe, PLLC
Schiffman Benjamin
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