Single collimator lens having one aspherical surface

Details Single collimator lens having one aspherical surface Single collimator lens having one aspherical surface

1988-06-01

1989-07-18

Arnold, Bruce Y.

G02B 302

Patent

active

RE0329886

ABSTRACT:
A collimator lens has a small numerical aperture and a specific focal length. One of the surfaces of the lens is planar and the other surface is aspherical. The aspherical surface is defined by a series expansion with only a few even terms.

REFERENCES:
patent: 2530397 (1950-11-01), Merte
patent: 3508811 (1970-04-01), Yoshida
patent: 3917766 (1975-11-01), Howden
patent: 4074314 (1978-02-01), Velzel et al.
patent: 4415238 (1983-11-01), Braat et al.
patent: 4431267 (1984-02-01), Finck et al.
patent: 4489408 (1984-12-01), Verhoeven et al.

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