Collimating lens for optical system using semiconductor laser

Details Collimating lens for optical system using semiconductor laser Collimating lens for optical system using semiconductor laser

1992-07-06

1996-02-13

Phan, James

Optical: systems and elements

Collimating of light beam

359717, 359793, G02B 2730, G02B 1318

Patent

active

054915872

ABSTRACT:
A collimating lens system comprises a chromatic aberration correction element and a converging lens which has both surfaces formed of a convex aspherical surface. The converging lens has no aberrations except chromatic aberration. The chromatic aberration correction element has small refractive power adapted to correct a chromatic aberration of the converging lens, and the element is constructed of positive and negative lenses cemented to each other. The positive lens and the negative lens have almost the same refractive index, and have different dispersion.

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