| 摘要 |
PROBLEM TO BE SOLVED: To provide a pair of binoculars capable of accurately correcting a convergence value according to an adjustment value at the time of short-distance observation with a simple structure. SOLUTION: A pair of binoculars 1 is equipped with guide shafts 11L and 11R being the centers of turning of objective optical systems 21L and 21R and arranged in parallel with the optical axes O<SB>1L</SB>and O<SB>1R</SB>thereof, projections 62L and 62R provided in lens frames 6L and 6R holding the optical systems 21L and 21R, and guide grooves 31L and 31R in which the projections 62L and 62R are inserted. The guide grooves 31L and 31R have inclined parts inclined to the optical axes O<SB>1L</SB>and O<SB>1R</SB>. In a state where the projections 62L and 62R are engaged with the inclined parts, a distance between the optical axes O<SB>1L</SB>and O<SB>1R</SB>is changed by the turning of the optical systems 21L and 21R centering around the guide shafts 11L and 11R as the optical systems 21L and 21R move back and forth, whereby the convergence value is corrected. The projections 62L and 62R are constituted so that their parts contacting with the inner surfaces of the guide grooves 31L and 31R may be spherical. COPYRIGHT: (C)2005,JPO&NCIPI
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