OPTICAL LENS AND MANUFACTURING METHOD THEREFOR

• Main Authors: CHEN ZHEN-MU, ZHAN HAI-BIN, CHO HUNGANG, YE QING-SHU, DENG YI-MAN
• Format: Patent
• Language: English; Japanese
• Published: 03.12.2015
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

PROBLEM TO BE SOLVED: To provide an optical lens which offers minimized optical axis tilt of lens elements incorporated into a lens module without requiring adjustment work during assembly.SOLUTION: A first lens element 31 and a second lens element 33 have annular opposing surfaces 42 formed in peripheral positions thereof. The annular opposing surface 42 of the second lens element 33 has a plurality of embossed elements 51 which protrude in an opposing direction and are spaced apart at an equal angle. When each lens element is mounted in a lens barrel 2 and if the second lens element 33 is found to be tilted relative to an optical axis L, an injection molding metal mold for the second lens element 33 is modified to change the height of each embossed element 51 so that the tilt is reduced. 【課題】組立て時に調整作業をすることなく、レンズモジュールに組み込まれるレンズ素子の光軸傾きを抑制することができる光学レンズを提供する。【解決手段】第１のレンズ素子３１および第２のレンズ素子３３それぞれの周囲には環状対向面４２が設けられる。第２のレンズ素子３３の環状対向面４２には、第１のレンズ素子３１の環状対向面４２と向き合う方向に、複数のボス要素５１が等角に離間して設けられる。鏡筒２に各レンズ素子を組み込んだ状態で、第２のレンズ素子３３が光軸Ｌに対して傾いていることが認められる場合、第２のレンズ素子３３の射出成型用金型を修正し、傾きが減じられるように各ボス要素５１の高さを変える。【選択図】図３