Making fast cylindrical gradient-index lenses diffraction limited by using a wave-front-correction element

被引：3

作者：

von Pfeil, A ^{[1
]}

Messerschmidt, B ^{[1
]}

Blumel, V ^{[1
]}

Possner, T ^{[1
]}

机构：

[1] Fraunhofer Inst Appl Opt & Precis Engn Jena, D-07745 Jena, Germany

来源：

APPLIED OPTICS | 1998年 / 37卷 / 22期

关键词：

D O I：

10.1364/AO.37.005211

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A wave-front-correction element (WFCE) is produced to make a cylindrical Ag-ion-exchanged gradient index (GRIN) lens with a high numerical aperture (0.53) diffraction limited (wave-front error, 0.02 lambda rms). The Nave-front aberrations of the cylindrical GRIN lens are measured by a phase-shifting shearing interferometer, with a conventional microscope objective used as a compensation lens. The continuous surface relief of the WFCE is produced by a lithographic process. The wavefront-corrected GRIN lens is applied to collimate the strongly divergent light (57 degrees full diverging angle measured at 1/e(2) of maximum intensity) emitted by a high-power diode laser. The power irradiated into a full angle of 2 mrad can be enhanced by a factor of 1.8 with the WFCE. (C) 1998 Optical Society of America.

引用

页码：5211 / 5215

页数：5

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