Patent ID: 9128239
Filing Date: 2015-09-08
Classification: G02B

Abstract:
1. An optical device, comprising: a straight advance barrel having an axis and a plurality of guiding grooves parallel to the axis; a cam barrel rotatably disposed around the straight advance barrel and having a first cam groove and a second cam groove; a first lens frame bearing a first lens group and having a plurality of first pins which extend through the guiding grooves and movably engage the first cam groove, wherein when the cam barrel rotates, the first cam groove moves the first pins along the guiding grooves so as to move the first lens frame along the axis; a second lens frame bearing a second lens group and having a plurality of second pins which extend through the guiding grooves and movably engage the second cam groove, wherein when the cam barrel rotates, the second cam groove moves the second pins along the guiding grooves so as to move the second lens frame along the axis; and a first spring connecting the first lens frame and the second lens frame and exerting a first spring force on the first lens frame and the second lens frame so that the first pins and the second pins abut the first cam groove and the second cam groove respectively.