Resin-cemented optical element, mold therefor, fabrication process thereof, and optical article
AssigneeNikon Corporation
InventorsAkiko Miyakawa, Hirofumi Ishiyama
Life of this patent
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Abstract
The present invention provides a resin-cemented optical element comprising a base member 10 and a resin layer 11 formed on the surface of the base member; the resin layer 11 being in a thickness of 300 μm or smaller at least at some part of a peripheral portion (i.e., a region within 1 mm from the peripheral edge face 17 of the resin layer 11, or a region outside an effective-diameter region), and being in a thickness 12 of 850 μm or larger at a position which is thickest in the resin layer; a mold therefore; a manufacturing method thereof; and an optical article having this optical element.
Claims10
A resin-cemented optical element, comprising:
- a base member having an external diameter and a periphery, and
- a resin layer having an external diameter and a peripheral edge face, and said resin layer is formed on a surface of said base member, wherein:
- said base member and said resin layer are in a concentric shape seen from an optical axis direction,
- said external diameter of said base member is larger than said external diameter of said resin layer,
- an exposed region of said base member that is not covered with said resin layer is used to be pushed with an ejector when said optical element is released from a mold,
- a peripheral portion of said resin layer that is a region within 1 mm from said peripheral edge face has a thickness of 300 μm or smaller for at least some part of said peripheral portion, and
- a region of said resin layer that is inside by 1 mm or more from said peripheral edge face has a thickness of 850 μm or larger as maximum thickness of said resin layer.
A resin-cemented optical element, comprising:
- a base member having an external diameter and a periphery, and
- a resin layer having an external diameter and a peripheral edge face, and said resin layer is formed on a surface of said base member, wherein:
- said base member and said resin layer are in a concentric shape seen from an optical axis direction,
- said external diameter of said base member is larger than said external diameter of said resin layer,
- an exposed region of said base member that is not covered with said resin layer is used to be pushed with an ejector when said optical element is released from a mold,
- an effective diameter region of said resin layer through which light rays used in said optical element are transmitted,
- an outside region of said resin layer which is outside of said effective diameter region has a thickness of 300 μm or smaller for at least some part of said outside region, and
- an inside region of said resin layer which is inside of said effective diameter region has a thickness of 850 μm or larger as maximum thickness of said resin layer.
Dependencies are inferred from the claim text.