Open AccessCemented doublet lens with an extended focal depth
Author(s) -
Xinping Liu,
Xianyang Cai,
Shoude Chang,
C. P. Grover
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.000552
Subject(s) - lens (geology) , optics , birefringence , focal length , optical axis , simple lens , materials science , perpendicular , physics , geometry , mathematics
A method of designing a lens with an extended focal depth is studied. The lens is a cemented doublet composed of a birefringent lens and a conventional lens. The crystal optical axis of the birefringent lens is perpendicular to the axis of the optical system. By properly selecting the parameters of the birefringent lens and the conventional lens, we can flexibly configure an imaging system that simultaneously has a large focal depth and high resolution. We also provide a theoretical analysis which shows that the focal depth of the lens is approximately 1.5 times that of a conventional lens.