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US 5,976,425 AGranted
Optical device molding apparatus and method, and optical device
AssigneeCanon Kabushiki Kaisha
InventorsTakeshi Nomura, Kiyoshi Yamamoto, Masashi Mashige
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Abstract
Lens surfaces are transferred by press-molding a glass material (16) by an upper mold (1) and a lower mold (2). After the lens surfaces are transferred, the outer circumferential portions of the upper and lower molds (1, 2) are clamped and pressed sideways to correct a shift between the optical axes of the transfer molding surfaces of the upper and lower molds (1, 2) and an inclination of the optical axes.
Claims6
A method of molding an optical device having a plurality of optical surfaces, comprising the steps of:
- inserting a material of said optical device into a pair of first and second molds, said molds having transfer surfaces for transferring the optical surfaces of said optical device;
- holding said pair of molds and the material of said optical device at a temperature at which press deformation is possible, and pressing the material of said optical device by said pair of molds to transfer the optical surfaces to the material;
- and
- pushing outer circumferential portions of said first and second molds simultaneously in a direction perpendicular to optical axes of the optical surfaces of said first and second molds to adjust a relative location of the optical axis of the optical surface of the first mold to the optical axis of the optical surface of the second mold.
1 more element
Dependencies are inferred from the claim text.