Collimator lens for optical fiber

Details Collimator lens for optical fiber Collimator lens for optical fiber

1987-09-11

1989-03-28

Sikes, William L.

350 9615, 350 9634, G12B 632

Patent

active

048158070

ABSTRACT:
A collimator lens for an optical fiber is disclosed. The collimator lens comprises a cylindrical member having an effective radius R and effective axial length L. The cylindrical member is formed of optically transparent material having refractive index n.sub.1. The cylindrical member has one circular end portion provided with a connecting portion connectable with a light emitting end face of an optical fiber and the other circular end portion provided with a fresnel lens pattern having a positive focal length F. The focal length F, the effective length L, the effective radius R and the refractive index n.sub.1 are satisfied with the following formula (I) and (II);

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