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Patent Searching and Data


Title:
MENISCUS CASSEGRAIN LENS
Document Type and Number:
WIPO Patent Application WO/2019/172694
Kind Code:
A1
Abstract:
The present invention relates to a meniscus Cassegrain lens and, more particularly, as an objective lens that can be used for a telescope, to a meniscus Cassegrain lens comprising a solid lens of which all of an incident plane, a primary mirror, and a secondary mirror are formed to be spherical. According to the present invention, there are advantages of providing visually high resolution, high resolving power, and wide field of view while reducing off-axis aberration. Moreover, as the primary mirror and the secondary mirror are formed by coating and protection-treating a reflective material on a lens, penetration of foreign matter or contamination is prevented, which enables semi-permanently maintaining clear mirrors without having to periodically re-coating the mirrors, and thus management and use are convenient.

Inventors:
KIM, Sung Soo (#108-1901, 45 Jungang-ro,Jung-Gu, Daejeon, 34867, KR)
Application Number:
KR2019/002683
Publication Date:
September 12, 2019
Filing Date:
March 07, 2019
Export Citation:
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Assignee:
KIM, Sung Soo (#108-1901, 45 Jungang-ro,Jung-Gu, Daejeon, 34867, KR)
International Classes:
G02B17/08; G02B15/14; G02B23/00; G02B27/00
Foreign References:
JPH11316343A1999-11-16
KR20140024647A2014-03-03
KR100258710B12000-06-15
JP2004361725A2004-12-24
JP2016035499A2016-03-17
Attorney, Agent or Firm:
PLUS INTERNATIONAL IP LAW FIRM (10F 809, Hanbat-daeroSeo-Gu, Daejeon, 35209, KR)
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