LENS ASSEMBLY

摘要

PROBLEM TO BE SOLVED: To provide a lens assembly having small size as a whole in which assembling property can be improved and desired optical characteristics can be easily obtained. SOLUTION: On the outer circumferential surface of a first lens 5, there are formed a first equi-diameter outer circumferential surface 5a on an end on a second lens 4 side thereof and a first sloped outer circumferential surface 5b having a progressively smaller outer diameter from the first equi-diameter outer circumferential surface 5a toward an end face on an opposite side to the second lens 4. On the outer circumferential surface of the second lens 4, there are formed a second equi-diameter outer circumferential surface 4a on an end on the first lens 5 side thereof and a second sloped outer circumferential surface 4b having a progressively larger outer diameter from the second equi-diameter outer circumferential surface 4a toward an end face on an opposite side to the first lens 5. In a lens frame 1, there are formed a sloped inner peripheral surface L6for fitting the first sloped outer circumferential surface 5b of the first lens 5, a first equi-diameter inner peripheral surface L5for fitting the first equi-diameter outer circumferential surface 5a of the first lens 5, and a second equi-diameter inner peripheral surface L3for fitting the second equi-diameter outer circumferential surface 4a of the second lens 4. COPYRIGHT: (C)2010,JPO&INPIT