Patent ID: 7830623
Filing Date: 2010-11-09
Classification: G02B

Abstract:
1. A method for connecting N lenses (where N (integer)>2) for an imaging-device in series, wherein each of the N lenses has a lens region in a center part and an outer periphery rim region formed on an outer part of the lens region, wherein the first lens of adjacent two lenses to be connected together has an outer periphery rim region which extends with a certain thickness from an outer periphery edge end portion of the lens region directing to the side of the second lens and the outer periphery rim region which has a circular-arc tapered surface inclined with respect to an optical axis on a outer part of the lens region, wherein the second lens of the adjacent two lenses to be connected together to each other has a bulgy-protrusion-shaped portion with head-top portion milled to be round along an outer part of the lens region on a surface of an outer periphery rim region opposed to the first lens, and wherein lens position adjustment is made by putting the bulgy protrusion-shaped portion of the second lens to the circular-arc tapered surface of the outer periphery rim region of the first lens while performing point contact to join and fix the two lenses each other, then the first lens and the second lens are joined and fixed in the state that the circular-arc tapered surface of first lens and the bulgy-protrusion-shaped portion of the second lens keep a point contact.