Infinite large-aperture lens system with aspherical surfaces

Details Infinite large-aperture lens system with aspherical surfaces Infinite large-aperture lens system with aspherical surfaces

1991-11-04

1993-04-20

Arnold, Bruce Y.

Optical: systems and elements

Lens

Including a nonspherical surface

359712, G02B 302

Patent

active

052047814

ABSTRACT:
A large-aperture lens system with a lens having aspherical surfaces to be used to read out optical information and to be used in optical communication transmission systems or the like. The lens in the system has a large aperture despite its very small focal length, because it is manufactured using glass with both a high refractive index and a high Abbe number giving the lens excellent aberration characteristics. The system can be manufactured using ultra-precision press-molding technology.

REFERENCES:
patent: 4449792 (1984-05-01), Arai et al.
patent: 4765723 (1988-08-01), Takamura

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