Analysis of a Cylindrical Microlens Array with Long Focal Depth by a Rigorous Boundary-Element Method and Scalar Approximations
Applied Optics, Vol. 43, Issue 27, pp. 5183-5192 (2004)
http://dx.doi.org/10.1364/AO.43.005183
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Abstract
We investigated the focal characteristics of open-regional cylindrical microlens arrays with long focal depth by using a rigorous boundary-element method (BEM) and three scalar methods, i.e., a Kirchhoff and two Rayleigh-Sommerfeld diffraction integral forms. Numerical analysis clearly shows that the model cylindrical microlens arrays with different f-numbers can generate focusing beams with both long focal depth and high transverse resolution. The performance of the cylindrical microlens arrays, such as extended focal depth, relative extended focal depth, diffraction efficiency, and focal spot size, is appraised and analyzed. From a comparison of the results obtained by the rigorous BEM and by scalar approximations, we found that the results are quite similar when the f-number equals f/1.6; however, they are quite different for f/0.8. We conclude that the BEM should be adopted to analyze the performance of a microlens array system whose f-number is less than f/1.0.
© 2004 Optical Society of America
OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(050.1970) Diffraction and gratings : Diffractive optics
(220.0220) Optical design and fabrication : Optical design and fabrication
Citation
Jia-Sheng Ye, Bi-Zhen Dong, Ben-Yuan Gu, and Shu-Tian Liu, "Analysis of a Cylindrical Microlens Array with Long Focal Depth by a Rigorous Boundary-Element Method and Scalar Approximations," Appl. Opt. 43, 5183-5192 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-27-5183
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