New type of large-angle binocular microtelescopes

Details New type of large-angle binocular microtelescopes New type of large-angle binocular microtelescopes

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991spie.1527..413l&link_type=abstract

Proc. SPIE Vol. 1527, p. 413-418, Current Developments in Optical Design and Optical Engineering, Robert E. Fischer; Warren J. S

Computer Science

Scientific paper

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.

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