MANUFACTURING METHOD FOR OPTICAL ELEMENT, MANUFACTURING METHOD FOR OPTICAL COMPONENT, OPTICAL ELEMENT, OPTICAL COMPONENT, STEREO IMAGING DEVICE, AND MOVING BODY

• Main Authors: KANEZASHI ICHIRO, KAWACHI KAZUHIRO, TAKADA ATSUSHI, OKADA KOGA
• Format: Patent
• Language: English; Japanese
• Published: 26.11.2020
• Subjects: ACCESSORIES THEREFOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; 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; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

To reduce warping of optical elements.SOLUTION: A mold 60 that defines a cavity section, a sprue section, a first runner section connected to the sprue section and to the cavity section through a plurality of first gates arranged in a longitudinal direction of the cavity section, and a second runner section connected to the cavity section through a plurality of second gates arranged longitudinally on the opposite side of the plurality of first gates is prepared (step S11). By injecting molten resin from the sprue section (step S13), the first runner section, the cavity section, and the second runner section are filled with the molten resin. The molten resin inside the mold 60 is cooled and solidified to form a molded product (step S15). The mold 60 is opened to take out the molded product (step S16). A first resin section corresponding to the first runner section and a second resin section corresponding to the second runner section are cut from the molded product (step S17).SELECTED DRAWING: Figure 10 【課題】光学素子の反りを低減する。【解決手段】キャビティ部、スプルー部、スプルー部に連通され、キャビティ部の長手方向に配列された複数の第１ゲートを介してキャビティ部に連通される第１ランナー部、及び複数の第１ゲートとは反対側に長手方向に配列された複数の第２ゲートを介して前記キャビティ部に連通される第２ランナー部を画成する金型６０を用意する（工程Ｓ１１）。スプルー部から溶融樹脂を射出することで（工程Ｓ１３）、第１ランナー部、キャビティ部、及び第２ランナー部に溶融樹脂を充填する。金型６０の内部の前記溶融樹脂を冷却固化して成形物を形成する（工程Ｓ１５）。金型６０を型開きして成形物を取り出す（工程Ｓ１６）。成形物から第１ランナー部に対応する第１樹脂部と、第２ランナー部に対応する第２樹脂部とを切断する（工程Ｓ１７）。【選択図】図１０