Molding die for optical element, optical element and master die
AssigneeKonica Corporation
InventorShigeru Hosoe
Life of this patent
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Abstract
A molding die for molding an optical element, comprises a die base body formed by shaping an amorphous alloy having a super-cooled liquid phase, and a die face formed by applying a die face forming process onto a part of the die base body and used to form an optical surface of the optical element or a dimensional reference surface.
Claims35
A molding die for molding an optical element, comprising:
- a die base body formed by shaping an amorphous alloy having a super-cooled liquid phase, and
- a die face formed by applying a die face forming process onto a part of the die base body and used to form an optical surface of the optical element or a dimensional reference surface.
The molding die of claim if wherein the die face forming process is a shaving process to shave the part of the die base body.
The molding die of claim 91 wherein the plurality of hollows or the plurality of protrusions on the optical surface of the optical element form a fine structure to generate a structural double refraction.
An optical element, comprising:
- an optical surface on which a plurality of protrusions or a plurality of hollows are formed,
- wherein the plurality of protrusions or a plurality of hollows are arranged with a pitch smaller than a wavelength of light transmitting through the optical surface.
A master die to form a molding die used for molding an optical element, comprising:
- a master die base body;
- and
- a master die face having a plurality of protrusions or a plurality of hollows so that a plurality of hollows or a plurality of protrusions are transferred from the master die face and formed on a die face of the molding die in correspondence with the plurality of protrusions or the plurality of hollows on the master die face.
Dependencies are inferred from the claim text.