1 December 1991 New type of large-angle binocular microtelescopes
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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.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kaichang Lu, Yafei Zhu, Songgao Kang, "New type of large-angle binocular microtelescopes", Proc. SPIE 1527, Current Developments in Optical Design and Optical Engineering, (1 December 1991); doi: 10.1117/12.48672; https://doi.org/10.1117/12.48672
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