INHOMOGENEOUS DISTRIBUTION OF BRIGHTNESS IN THE SPLIT-ELEMENT FILTER

Authors
DENG YY AI GX WANG JS
Citation
Yy. Deng et al., INHOMOGENEOUS DISTRIBUTION OF BRIGHTNESS IN THE SPLIT-ELEMENT FILTER, Applied optics, 36(7), 1997, pp. 1576-1579
Citations number
3
Categorie Soggetti
Optics
Journal title
Applied optics → ACNP
ISSN journal
00036935
Volume
36
Issue
7
Year of publication
1997
Pages
1576 - 1579
Database
ISI
SICI code
0003-6935(1997)36:7<1576:IDOBIT>2.0.ZU;2-0
Abstract
The inhomogeneous distribution of brightness in a split-element filter is discussed. This inhomogeneity is caused by the off-axis effect of the birefringent crystal and can seriously affect astronomical observa tions in the case of a large field of view. For example, the maximal b rightness fluctuation is similar to 9.44% in a full-disk solar telesco pe whose maximal incident angle is 70 arcmin. We also discuss ways to avoid this disadvantage. (C) 1997 Optical Society of America.