Bifocal optical system for distant object tracking | Zendy

Xinping Liu | Zendy; Xianyang Cai | Zendy; Shoude Chang | Zendy; Chander P. Grover | Zendy

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Bifocal optical system for distant object tracking

Author(s) -

Xinping Liu,

Xianyang Cai,

Shoude Chang,

Chander P. Grover

Publication year - 2005

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/opex.13.000136

Subject(s) - optics , lens (geology) , tracking (education) , focus (optics) , focal length , computer science , birefringence , computer vision , physics , artificial intelligence , psychology , pedagogy

A new bifocal optical system used for distant object tracking is proposed. This system combines a birefringent element with a conventional glass lens so that the spot image size and its variation with the axial distance can be controlled according to the requirement of a distant object tracker. The lens design for the tracking application is discussed and an example is given. The new lens system provides a more uniform spot image size and an extended focal depth compared to a conventional lens with one focus.

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