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AssigneeCanon Kabushiki Kaisha
InventorsHiroshi Nakanishi, Yoshito Matsuoka, Yoichi Shibata, Toshiaki Magome, Takashi Ubagai
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There are provided a plastic molded optical element and a molding mold therefor capable of preventing flash generation as well as making the handling of the molded optical element easy by forming a projection on the main body of an optical element, corresponding to the matching portions (parting planes) of the molding members of the molding mold or die members for molding the optical element. A thin projection is formed on the main body of the optical element in a thickness required for securing a required strength in relation to the matching portions (parting planes) of the molding members or die member for molding the optical element.
An optical element molded with molten plastic resin, which is injected into a cavity within a mold and then cooled and solidified, said optical element comprising:
An optical element molded with molten plastic resin, which is injected into a cavity within a mold and then cooled and solidified, said optical element comprising:
A mold for molding an optical element by injecting molten plastic resin material, the mold comprising:
Dependencies are inferred from the claim text.