Single collimator lens having one aspherical surface

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

1984-03-23

1986-06-03

Corbin, John K.

350417, G02B 1318, G02B 2610

Patent

active

045926271

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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