| 摘要 |
PROBLEM TO BE SOLVED: To provide a pair of binoculars capable of accurately correcting a convergence 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 guiding objective optical systems 21L and 21R and also being the centers of turning of the optical systems 21L and 21R and arranged in parallel with the optical axes O<SB>1L</SB>and O<SB>1R</SB>thereof, guide rails 31L and 31R guiding the optical systems 21L and 21R, and projections 62L and 62R provided in lens frames 6L and 6R and engaged with the guide rails 31L and 31R. In a state where the projections 62L and 62R are engaged with the inclined parts of the guide rails 31L and 31R, a distance between the optical axes O<SB>1L</SB>and O<SB>1R</SB>of the optical systems 21L and 21R is changed as the optical systems 21L and 21R are moved by the actuation of a focusing mechanism 5, whereby the convergence value is corrected. Line segments 300 linking the projections 62L and 62R with the centers of the guide shafts 11L and 11R pass through the vicinity of the centers of the optical systems 21L and 21R when viewed in the directions of the optical axes O<SB>1L</SB>and O<SB>1R</SB>. COPYRIGHT: (C)2005,JPO&NCIPI
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