Patent ID: 7113331
Filing Date: 2006-09-26
Classification: G03B

Abstract:
1. A binocular telescope with a photographing function, said binocular telescope having a pair of observation optical systems with an adjustable interpupillary distance, and a photographing optical system, said pair of observation optical systems being utilized as a focusing device for said photographing optical system, said binocular telescope comprising: a first focusing mechanism that focuses said pair of observation optical systems so as to observe an object through said pair of observation optical systems; a second focusing mechanism that focuses said photographing optical system so as to photograph said object through said photographing optical system; an association mechanism that associates said first and second focusing mechanisms with each other such that said pair of observation optical systems and said photographing optical system are always kept in a focused state; a pair of reticle elements on which reticles are formed, and which are provided in each observation optical system of said pair of observation optical systems for focusing said pair of observation optical systems with a predetermined dioptric power during an operation of said first and second focusing mechanisms, each of said pair of reticle elements being arranged at an in-focus position of an objective lens system of said observation optical system, a position of an ocular lens system of said observation optical system being adjustable relative to the position of said reticle element so as to adjust the dioptric power; and an interpupillary distance adjuster that adjusts the distance between the optical axes of said pair of observation optical systems; wherein, when the optical axes of said pair of observation optical systems are made completely coincident with the interpupillary distance of the user by using said interpupillary distance adjuster so that reticle images of said pair of reticle elements are fused, the fused reticle images are geometrically non-coordinate with each other and form a cross.