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KMID : 1011420090140040039
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Journal of Korean Ophthalmic Optics Society
2009 Volume.14 No. 4 p.39 ~ p.44
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Design of an Optical System for Iris Photographing
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Park Seung-Hwan
Lee Dong-Hee
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Abstract
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Purpose: To design a mini optical system photographing the iris, which is used in the iridology.
Methods: We designed a mini optical system photographing the iris by using the Sigma 2000 design program.
Results: We designed a mini optical system photographing the iris, which is suitable in the CCD using a micro actuator for auto-focusing, of which characteristics have the TCL of 30 mm, a magnification of -0.65, about 8.0 mm distance from the 1st lens to the last lens, the max barrel diameter of 11 mm, and about 1 mm of the effective stop diameter. Also the resolution line width of this system is characterised by 92 lps/mm at the 30% MTF value criterion.
Conclusions: By designing an optical system of which characteristics have the TCL of 30 mm, about 8.0 mm distance from the 1st lens to the last lens, the max barrel diameter of 11 mm, and the resolution line width of 5.4 mm at the 30% MTF value criterion, we could miniaturize the iris photographing optical system.
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KEYWORD
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Iridology, Finite optical system, Iris photographing, Resolution
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