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KMID : 1011420090140030029
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Journal of Korean Ophthalmic Optics Society
2009 Volume.14 No. 3 p.29 ~ p.35
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Development on a Relay Lens Type Scope with 70 mm Eye Relief
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Park Seung-Hwan
Lee Dong-Hee
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Abstract
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Purpose: To develop a relay lens type scope with 70 mm eye relief.
Methods: By using Sigma 2000 design program, we designed and manufactured a relay lens type scope with 70 mm eye relief, which is integrated after designing an objective part with relay lenses and an eyepiece part, respectively.
Results: The characteristics of the relay lens type scope with 70 mm eye relief whch is designed and manufactured by methods, which integrate after respectively designing an object part with relay lenses and an eyepiece part, have the magnification of +4.0?, the length from 1st lens to last lens of about 105 mm, the barrel diameter of 18mm, and the effective diameter of 13 mm. Also we know that the resolution line width is 275 cycles/rad at the 30% MTF value criterion.
Conclusions: We could design and manufacture the relay type scope with 70 mm eye relief, the characteristics of which have the magnification of +4.0?, the MTF above 30% at 275 cycles/rad, and the length from 1st lens to last lens of about 105 mm.
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KEYWORD
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Eye relief, +4×, Relay Lens type, Scope
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