Collimator lens

Details Collimator lens Collimator lens

1986-04-28

1987-09-15

Corbin, John K.

G02B 300

Patent

active

046935657

ABSTRACT:
A collimator lens to be used for an optical recording/reproducing apparatus is constituted by a refractive index distribution type lens to satisfy specific conditions, thereby the invention provides the collimator lens which is good in the productivity and has the wave surface aberration being equivalent to or better than that of a collimator lens using a spherical lens.

REFERENCES:
patent: 4634233 (1987-01-01), Usami et al.
patent: 4639094 (1987-01-01), Aono
patent: 4643535 (1987-02-01), Ichikawa
patent: 4647159 (1987-03-01), Baba

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