Optical element and method of molding the same

Details Optical element and method of molding the same Optical element and method of molding the same

2008-07-29

2008-07-29

Font, Frank G (Department: 2883)

Optical waveguides

With optical coupler

Input/output coupler

C385S031000, C385S039000, C385S147000, C385S901000, C359S727000, C359S642000, C264S001700, C425S808000

Reexamination Certificate

active

07406223

ABSTRACT:
The present invention provides an optical element capable of preventing a ghost in the use for a sensor such as a CCD or CMOS. In the optical element including an optical function surface of high surface accuracy and a flange formed around the surface, the optical function surface having an optical surface diameter somewhat larger than an effective diameter in order to secure high surface accuracy for the effective diameter, a parting diameter of a molding die is made larger than the optical surface diameter and a parting position is disposed outside the optical surface diameter.

REFERENCES:
patent: 4208102 (1980-06-01), Ohkura
patent: 4461547 (1984-07-01), Ikari et al.
patent: 5276552 (1994-01-01), Kohmoto et al.
patent: 5374668 (1994-12-01), Kanemura et al.
patent: 5581412 (1996-12-01), Tanaka
patent: 5861998 (1999-01-01), Nishimura
patent: 5995304 (1999-11-01), Nomura et al.
patent: 2003-298885 (2003-10-01), None

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