LENS UNIT

• Main Authors: TSURUOKA YASUO, OKADA SHINYA, TANIGAWA TAKEMOTO, YAMAMOTO AKINORI, UMEDA KATSUMI, SHIRATORI TOSHIO
• Format: Patent
• Language: English; Japanese
• Published: 27.01.2022
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

To suppress the deterioration of position accuracy in an optical axis direction of a lens caused by disposing a heater inside a lens unit.SOLUTION: A lens unit 1 is equipped with a plurality of lenses aligned along an optical axis L, and a lens holder 2. A first lens L1 at the most object side La is equipped with an object side lens surface 11 and an image side lens surface 12, and an image side flange surface 13 surrounding the image side lens surface 12. In the lens holder 2, a first storage portion 4 storing the first lens L1 is equipped with a regulating portion 42 regulating a position in an optical axis L direction of the first lens L1. The regulating portion 42 is equipped with a lens seat surface 40 on which the first lens L1 abuts. The image side flange surface 13 of the first lens L1 is equipped with an outer peripheral area 13A in which the lens seat surface 40 of the regulating portion 42 abuts, and an inner peripheral area 13B in which a flexible printed circuit board 8 equipped with a heater 9 is disposed.SELECTED DRAWING: Figure 8 【課題】レンズユニットの内部にヒータを配置したことに起因する、レンズの光軸方向の位置精度の低下を抑制する。【解決手段】レンズユニット１は、光軸Ｌに沿って並ぶ複数のレンズと、レンズホルダ２を備える。最も物体側Ｌａにある第１レンズＬ１は、物体側レンズ面１１および像側レンズ面１２と、像側レンズ面１２を囲む像側フランジ面１３を備える。レンズホルダ２において、第１レンズＬ１を収容する第１収容部４は、第１レンズＬ１の光軸Ｌ方向の位置を規制する規制部４２を備える。規制部４２は、第１レンズＬ１が当接するレンズ座面４０を備える。第１レンズＬ１の像側フランジ面１３は、規制部４２のレンズ座面４０が当接する外周領域１３Ａ、および、ヒータ９を備えるフレキシブルプリント基板８が配置される内周領域１３Ｂを備える。【選択図】図８