| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent an adhesive from protruding from a side face of each resin lens and to obtain sufficient adhesive strength even when a plurality of resin lenses of a lens unit constituted by stacking the respective resin lenses one over another are bonded together. <P>SOLUTION: The lens unit comprises first to fourth resin lenses 10-13. The respective resin lenses 10-13 have recessed parts 14-17 formed by cutting parts of side faces and also have gate marks 20-23 which do not protrude from the side faces, and are stacked such that the adjacent gate marks 20-23 shift in position by approximately 180°on an optical axis. An adhesive is applied to the recessed parts 14-17 and contact parts contacting the adjacent resin lenses 10-13 so as not to protrude from the side faces, and the respective resin lenses 10-13 which are thus stacked are bonded together in one body with the adhesive. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
