Optical element and manufacturing method of the optical element
AssigneeKonica Minolta Opto, Inc.
InventorTakeshi Kojima
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Abstract
An optical element having an optical axis, comprises an element body having the maximum first length of 4 mm or less in the optical axis direction and the second maximum length of 6 mm or less in the direction perpendicular to the optical axis direction; wherein the element body is made of a resin containing a polymer having an alicyclic structure and is treated by one of heat treatment and wet-heat treatment for 16 hours or longer at a temperature lower by 35° C. to 45° C. than the glass transition temperature of the resin after the element body has been formed by injecting the resin in a mold, where the glass transition temperature of the resin is measured by differential-scanning-calorimetry method at heating rate 10° C./min on the basis of JIS K7121.
Claims11
An optical element having an optical axis, comprising:
- an element body having the maximum first length of 4 mm or less in the optical axis direction and the second maximum length of 6 mm or less in the direction perpendicular to the optical axis direction;
- wherein the element body is made of a resin containing a polymer having an alicyclic structure and is treated by one of heat treatment and wet-heat treatment for 16 hours or longer at a temperature lower by 35° C. to 45° C. than the glass transition temperature of the resin after the element body has been formed by injecting the resin in a mold, where the glass transition temperature of the resin is measured by differential-scanning-calorimetry method at heating rate 10° C./min on the basis of JIS K7121.
A method of producing an optical element having an optical axis, comprising:
- molding a resin containing a polymer having an alicyclic structure to form an element body having the maximum first length of 4 mm or less in the optical axis direction and the second maximum length of 6 mm or less in the direction perpendicular to the optical axis direction;
- and thereafter,
- treating the element body by one of heat treatment and wet-heat treatment for 16 hours or longer at a temperature lower by 35° C. to 45° C. than the glass transition temperature of the resin, where the glass transition temperature of the resin is measured by differential-scanning-calorimetry method at heating rate 10° C./min on the basis of JIS K7121.
Dependencies are inferred from the claim text.