SPACE-VARIANT FILTERING WITH HOLOGRAPHIC MULTIFACET ELEMENTS

被引:10
作者
BARTELT, H
SAUER, F
机构
[1] Physikalisches Inst, Erlangen, West Ger, Physikalisches Inst, Erlangen, West Ger
关键词
HOLOGRAPHY - Imaging Techniques;
D O I
10.1016/0030-4018(85)90266-4
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A spatial filtering method is proposed for space-variant operations. The method is based on the combination of a holographic lenslet array and an appropriate filter array. The lenslets produce local Fourier transforms of the object which are filtered in parallel and independently by the spatial filters. The most obvious space-variant setup based on lenslet arrays would consist of many narrow 4f-setups, arranged side by side. The total object would be partitioned into many small object patches, as many as there are lens elements in the lenslet array. However this setup shows the undesired effect of local inversion. A setup was chosen with only one lenslet array and an imaging lens which avoids the local inversion.
引用
收藏
页码:296 / 301
页数:6
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