Method for manufacturing member, apparatus for manufacturing member, preform, member, lens unit, and equipment
AssigneeCanon Kabushiki Kaisha
InventorsRYUNOSUKE ARAKAWA, JUNNOSUKE NAKAMURA
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Abstract
A method for manufacturing a member, includes: a heating step of heating a preform to form a temperature distribution in the preform; and a molding step of pressing the preform, in which the temperature distribution has been formed, with a die to mold the member from the preform, wherein the preform has a first region and a second region outside the first region, and wherein the heating step forms the temperature distribution in which a temperature of the second region is lower than a temperature of the first region.
Claims20
A method for manufacturing a member, the method comprising:
- a heating step of heating a preform to form a temperature distribution in the preform;
- and
- a molding step of pressing the preform, in which the temperature distribution has been formed, with a die to mold the member from the preform,
- wherein the preform has a first region and a second region outside the first region, and
- wherein the heating step forms the temperature distribution in which a temperature of the second region is lower than a temperature of the first region.
An apparatus for manufacturing a member, the apparatus comprising:
- a die;
- a heating unit configured to heat a preform to form a temperature distribution in the preform;
- and
- a drive system configured to press the preform, in which the temperature distribution has been formed, with the die to mold the member from the preform or to demold the member from the die,
- wherein the preform has a first region and a second region outside the first region, and
- wherein the heating unit forms the temperature distribution in which a temperature of the second region is lower than a temperature of the first region.
A preform for use in press molding, the preform comprising:
- a first region;
- and
- a second region outside the first region,
- wherein a film having an absorption rate of electromagnetic waves lower than that of the preform is formed in the second region.
A member comprising:
- a main body;
- and
- a film adhering to the main body, the film having an absorption rate of electromagnetic waves lower than that of the main body,
- wherein the main body has a first region and a second region outside the first region, and
- wherein a third region to which the film adheres and a fourth region where the main body is exposed are alternately arranged in the second region.
Dependencies are inferred from the claim text.