LENS UNIT

• Main Authors: SHIMIZU GENICHI, KOBORI MAKOTO
• Format: Patent
• Language: English; Japanese
• Published: 15.11.2018
• 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; ELECTROGRAPHY; HOLOGRAPHY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a lens unit with which it is possible to suppress a reduction in accuracy of holding a lens in a lens barrel.SOLUTION: A lens unit 10 comprises a cylindrical lens barrel 12 composed of a resin material containing inorganic fiber and provided with a plurality of flat parts 44 as holding parts on an inner circumferential surface 12A, and a lens 32 housed inside the lens barrel 12 with its outer circumferential surface held by the flat parts 44. In an optical axis direction view, the lens barrel 12 has a plurality of gate parts 42 for resin injection formed with equal intervals in the circumferential direction, with the flat parts 44 provided at positions shifted in the circumferential direction from intermediate portions 46 of the gate parts 42 adjacent to each other in the circumferential direction.SELECTED DRAWING: Figure 2 【課題】鏡筒内におけるレンズの保持精度の低下を抑制することができるレンズユニットを提供する。【解決手段】レンズユニット１０は、無機繊維を含有する樹脂材料から成り、内周面１２Ａに複数の保持部としての平坦部４４が設けられた筒状の鏡筒１２と、鏡筒１２内に収容され、外周面が平坦部４４によって保持されるレンズ３２と、を有し、光軸方向視において、鏡筒１２には、樹脂射出用の複数のゲート部４２が周方向に等間隔に形成されており、平坦部４４は、周方向に隣合うゲート部４２同士の中間部４６から周方向にずれた位置に設けられている。【選択図】図２