Microlenses and other optical elements fabricated by laser heati

Details Microlenses and other optical elements fabricated by laser heati Microlenses and other optical elements fabricated by laser heati

1995-03-08

1997-02-18

Epps, Georgia Y.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By surface composed of lenticular elements

359722, 2502019, G02B 2710, G02B 300, G01J 120

Patent

active

056046359

ABSTRACT:
Disclosed is a method of preparing refractive microlenses in a single step, utilizing laser-induced surface structure formation in semiconductor doped glasses (SDGs). The SDG materials, in conjunction with above-bandgap wavelength laser sources, are used to fabricate lenses that operate with light of below-bandgap wavelengths. In accordance with the teaching of this invention lenses on an approximately 5-500 .mu.m diameter scale are fabricated individually or in arrays by laser irradiation of absorbing glasses. The microlenses have controllable characteristics and can be fabricated to have focal lengths as short as tens of microns. The lenses are generally parabolic or spherical in shape and are highly reproducible.

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