High focal depth with a pure-phase apodizer

被引：113
作者：
Wang, HF [1 ]
Gan, FX [1 ]
机构：
[1] Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
来源：
APPLIED OPTICS | 2001年 / 40卷 / 31期
关键词：
D O I：
10.1364/AO.40.005658
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
High-density optical data storage requires high-numerical-aperture (NA) lenses and short wavelengths, But, with increasing NA and decreasing wavelength, the depth of focus (DOF) decreases rapidly. We propose to use pure-phase superresolution apodizers to optimize the axial intensity distribution and extend the DOF of an optical pickup. With this kind of apodizer, the expected DOF can be 2-4.88 times greater than that of the original system, and the spot size will be smaller than that of the original system. (C) 2001 Optical Society of America.
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收藏
页码：5658 / 5662
页数：5
相关论文
共 16 条
[1]   PHASE-SHIFTING APODIZER OF 3 OR MORE PORTIONS [J].
ANDO, H .
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1992, 31 (2B) :557-567
[2]  
Hausler G., 1972, Optics Communications, V6, P38, DOI 10.1016/0030-4018(72)90243-X
[3]   IMAGING WITH FRESNEL ZONE PUPIL MASKS - EXTENDED DEPTH OF FIELD [J].
INDEBETOUW, G ;
BAI, H .
APPLIED OPTICS, 1984, 23 (23) :4299-4302
[4]   COHERENT PROCESSING AND DEPTH OF FOCUS OF ANNULAR APERTURE IMAGERY [J].
MCCRICKE.JT .
APPLIED OPTICS, 1971, 10 (10) :2226-&
[5]   SPATIAL FILTER FOR INCREASING THE DEPTH OF FOCUS [J].
OJEDACASTANEDA, J ;
BERRIELVALDOS, LR ;
MONTES, E .
OPTICS LETTERS, 1985, 10 (11) :520-522
[6]   LINE-SPREAD FUNCTION RELATIVELY INSENSITIVE TO DEFOCUS [J].
OJEDACASTANEDA, J ;
BERRIELVALDOS, LR ;
MONTES, EL .
OPTICS LETTERS, 1983, 8 (08) :458-460
[7]   HIGH FOCAL DEPTH BY QUASIBIFOCUS [J].
OJEDACASTANEDA, J ;
DIAZ, A .
APPLIED OPTICS, 1988, 27 (20) :4163-4164
[8]   ARBITRARILY HIGH FOCAL DEPTH WITH FINITE APERTURES [J].
OJEDACASTANEDA, J ;
VALDOS, LRB .
OPTICS LETTERS, 1988, 13 (03) :183-185
[9]   ANNULAR APODIZERS FOR LOW SENSITIVITY TO DEFOCUS AND TO SPHERICAL-ABERRATION [J].
OJEDACASTANEDA, J ;
ANDRES, P ;
DIAZ, A .
OPTICS LETTERS, 1986, 11 (08) :487-489
[10]   IMAGE-PROCESSING FOR EXTENDED DEPTH OF FIELD [J].
PIEPER, RJ ;
KORPEL, A .
APPLIED OPTICS, 1983, 22 (10) :1449-1453
12