Two-zone pupil filters

被引：25

作者：

Sheppard, Colin J. R. ^{[1
,2
]}

Campos, Juan ^{[3
]}

Escalera, Juan C. ^{[3
]}

Ledesma, Silvia ^{[4
]}

机构：

[1] Natl Univ Singapore, Div Bioengn, Singapore 117574, Singapore

[2] Natl Univ Singapore, Dept Diagnost Radiol, Singapore 119074, Singapore

[3] Univ Autonoma Barcelona, Dept Fis, Bellaterra 08193, Spain

[4] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Buenos Aires, DF, Argentina

来源：

OPTICS COMMUNICATIONS | 2008年 / 281卷 / 05期

关键词：

D O I：

10.1016/j.optcom.2007.10.050

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The performance of pupil filters consisting of two zones each of constant complex amplitude transmittance is investigated. For filters where the transmittance is real, different classes of potentially useful filter are identified and optimized. These include leaky filters with an inner zone of low amplitude transmittance, pure phase filters with phase change of pi, and equal area filters. The first of these minimizes the relative power in the outer rings for a given axial resolution, the second maximizes the Strehl ratio for a given transverse resolution, and the third minimizes the relative power in the outer rings for a given transverse resolution. Complex filters can give an axially shifted maximum in intensity: the performance parameters calculated relative to the true focus are investigated for some different classes of filter, but filters with phase change not equal to pi are found to give inferior performance to the real value filters. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：913 / 922

页数：10

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