Patent ID: 8270103
Filing Date: 2012-09-18
Classification: G02B

Abstract:
1. An imaging lens unit configured to be processed by a solder reflow process, comprising: a lens group consisting of one or more lenses; and a lens tube that supports the lens group, wherein the lens tube is formed from a thermoplastic resin material having a deflection temperature under load of not lower than 200° C., and the imaging lens unit has a clearance between the lens tube and at least one of the cationically-cured epoxy resin lenses and has lens supporting portions that are provided at at least three locations inside the lens tube and that support the at least one cationically-cured epoxy resin lens, wherein the imaging lens unit has a clearance between the lens tube and the cationically-cured epoxy resin lens supported by the lens supporting portions, in a manner that satisfies the following formula (1): wherein B represents an inner diameter of the lens tube at an installation place of the cationically-cured epoxy resin lens at 25° C.; α α T represents the highest temperature (° C.) in the solder reflow process for the imaging lens unit; and X represents the clearance.