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Proceedings Paper

New type of large-angle binocular microtelescopes
Author(s): Kaichang Lu; Yafei Zhu; Songgao Kang
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Paper Abstract

A new type of Galilean binoculars is presented. The objective lenses are composed of a cemented doublet and a positive meniscus, and the eyepiece is a negative thick meniscus. In addition, all of the surfaces except the gluing surface are concave toward the eye-side of the system. So the structure is suitable for both increasing the field of view and decreasing the dimensions. It increases the vision angle by 46.5% and reduced the dimensions approx 2.33 times. The characteristics are: the magnifying power, 2.3; the object vision angle, 32 deg when its interpupillary distance is 6 mm, 27,36 deg when its interpupillary distance is 8 mm; the total of the telescope 29 mm; and the full objective aperture, (Phi) 35 mm.

Paper Details

Date Published: 1 December 1991
PDF: 6 pages
Proc. SPIE 1527, Current Developments in Optical Design and Optical Engineering, (1 December 1991); doi: 10.1117/12.48672
Show Author Affiliations
Kaichang Lu, Harbin Institute of Technology (China)
Yafei Zhu, Harbin Institute of Technology (China)
Songgao Kang, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 1527:
Current Developments in Optical Design and Optical Engineering
Robert E. Fischer; Warren J. Smith, Editor(s)

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