Patent ID: 8279413

Claim:
An optical sight having a range-finding function comprising: an outer barrel unit extending about an axis and having a front end and a rear end; an objective lens unit mounted to said front end of said outer barrel unit; an ocular lens unit mounted to said rear end of said outer barrel unit; a magnification unit disposed between said objective lens unit and said ocular lens unit; a mounting unit disposed in said outer barrel unit between said objective lens unit and said magnification unit, said mounting unit having an outer peripheral surface, and an inner passage extending along the axis; and a range-finding module disposed in said outer barrel unit and including a light emitter disposed on said magnification unit, a light receiver disposed on said magnification unit, and a circuit board unit, said circuit board unit including a main circuit board mounted on said outer peripheral surface of said mounting unit, said main circuit board being electrically connected to said light emitter and said light receiver and operable to calculate a distance to a target in cooperation with said light emitter and said light receiver.