Patent ID: 6307673
Filing Date: 2001-10-23
Classification: G02B

Abstract:
A focusing device for a biaxial type binocular, said biaxial type binocular comprising: a pair of telescopic optical systems including a pair of objective optical systems and a pair of eyepieces; and a supporting member which fixedly holds said pair of objective optical systems and rotatably supports a pair of eyepiece unit including a pair of eyepiece holding portions which hold said pair of eyepieces such that eyepiece optical axes of said pair of eyepiece optical systems are parallel to objective optical axes of said pair of objective optical systems and said pair of eyepieces are rotatable around said objective optical axes,said focusing device comprising:a connecting member that connects said pair of eyepiece holding portions; anda driving assembly that drives said connecting member in a direction parallel to said eyepiece optical axes.