Dynamic range expansion of a Shack-Hartmann sensor by use of a modified unwrapping algorithm

被引：93

作者：

Pfund, J ^{[1
]}

Lindlein, N ^{[1
]}

Schwider, J ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Inst Phys, D-91058 Erlangen, Germany

来源：

OPTICS LETTERS | 1998年 / 23卷 / 13期

关键词：

D O I：

10.1364/OL.23.000995

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An algorithm for expanding the dynamic range of Shack-Hartmann sensors is proposed. The distribution of the spot dislocations is treated with a modified unwrapping algorithm that is widely used in interferometry. The algorithm unwraps the spot dislocations and assigns the spots to their original subapertures, leading to a huge expansion of the dynamic range. For the proposed algorithm there remains a limitation on the maximum wave-front curvature instead of on the maximum wave-front slope. Examples are given that show spot fields that were wrapped four times; the measured wave front had a peak-to-valley value of 116 lambda. (C) 1998 Optical Society of America.

引用

页码：995 / 997

页数：3

共 5 条

[1]

[Anonymous], 1978, OPT SHOP TEST

[2]

BRUNO TL, 1993, P SOC PHOTO-OPT INS, V1920, P328, DOI 10.1117/12.152677

[3] Two-dimensional phase unwrapping using a minimum spanning tree algorithm [J].

Ching, Neng H. ;

Rosenfeld, Dov ;

Braun, Michael .

IEEE TRANSACTIONS ON IMAGE PROCESSING, 1992, 1 (03) :355-365

[4]

SCHREIBER H, 1993, P SOC PHOTO-OPT INS, V1983, P716

[5] CHARACTERIZATION OF MICROLENSES USING A PHASE-SHIFTING SHEARING INTERFEROMETER [J].

SICKINGER, H ;

FALKENSTORFER, O ;

LINDLEIN, N ;

SCHWIDER, J .

OPTICAL ENGINEERING, 1994, 33 (08) :2680-2686

← 1 →