Optical: systems and elements – Compound lens system – Telescope
Patent
1995-08-03
1998-03-31
Nguyen, Thong
Optical: systems and elements
Compound lens system
Telescope
359407, 359412, 359414, G02B 2300
Patent
active
057344990
ABSTRACT:
An interpupillary distance adjusting mechanism for use in a binocular telescope, having a pair of lens-barrels which contain lens optical systems, respectively, and are placed in parallel with each other. The interpupillary distance adjusting mechanism further has first and second guide shafts, which slidably guide the pair of lens-barrels in a direction substantially perpendicular to the direction of the optical axes of the lens optical systems, interpupillary distance adjusting springs for pushing the pair of lens-barrels in a sliding direction, and an interpupillary distance adjusting cam which can adjust an interpupillary distance by sliding the pair of lens-barrels along the guide shafts as the result of undergoing a pushing force from the interpupillary distance adjusting spring, of converting a part of the pushing force in a direction which intersects the sliding direction, and of moving the pair of lens-barrels by pushing the pair of lens-barrels against the first guide.
REFERENCES:
patent: 4449787 (1984-05-01), Burbo et al.
patent: 5335110 (1994-08-01), Shin
patent: 5381263 (1995-01-01), Nowak et al.
English Abstract of the Japanese reference No. 55-161205.
Matsumoto Yoshihiro
Tomikawa Fumio
Nguyen Thong
Olympus Optical Co,. Ltd.
Weinstein Louis
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