Collimator lens

Patent

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Details

G02B 300, G02B 902

Patent

active

046680535

ABSTRACT:
A collimator lens of graded index type for a semiconductor laser which can be manufactured at low cost and has the residual wavefront aberration equal to or less than that of a conventional collimator lens of spherical lens system is provided by comprising a rod lens of graded index type made of a cylindrical transparent medium having the refractive index n(r) at position of radial distance r from the central axis represented by;

REFERENCES:
patent: 3859103 (1975-01-01), Yoshiyagawa et al.

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