Pressing mold for optical lenses and method for manufacturing glass optical lenses
AssigneePanasonic Corporation
InventorsYoshifumi Takasu, Naomi Kishimoto, Yuta Moriyama, Tooru Furushige
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Abstract
A pressing mold for optical lenses, which molds a ring-zone-type diffraction lens having a plurality of concentric ring zones, the mold including: diffraction action transfer surfaces configured to form diffraction action surfaces that diffract light passing through the diffraction lens; and step transfer surfaces configured to form step surfaces that connect the adjacent diffraction action surfaces of the diffraction lens, wherein surface roughness of the step transfer surfaces is larger than surface roughness of the diffraction action transfer surfaces.
Claims11
A pressing mold for optical lenses, which molds a ring-zone-type diffraction lens having a plurality of concentric ring zones, the mold comprising:
- diffraction action transfer surfaces configured to form diffraction action surfaces that diffract light passing through the diffraction lens;
- and
- step transfer surfaces configured to form step surfaces that connect the adjacent diffraction action surfaces of the diffraction lens, wherein
- surface roughness of the step transfer surfaces is larger than surface roughness of the diffraction action transfer surfaces,
- wherein fine grooves are formed on the step transfer surfaces, and
- a direction of the fine groove is a direction of a rotation axis of the concentric ring zone.
Dependencies are inferred from the claim text.