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US 8,947,795 B2Granted
Plastic optical element and method of manufacturing the same
AssigneeCanon Kabushiki Kaisha
InventorsDaigo Kobayashi, Wataru Kikuchi
Life of this patent
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Abstract
A plastic optical element includes a member and covering portions formed on a first surface and a second surface of the member. A projecting portion made of a material out of which the member is made and a material out of which the covering portions are made is formed on a part of a side surface of the member, and the covering portion of the first surface and the covering portion of the second surface are connected to each other through the projecting portion.
Claims8
A plastic optical element comprising:
- a member including a first surface, a second surface opposite the first surface, and a side surface connecting the first surface and the second surface;
- a first covering portion covering the first surface;
- a second covering portion made of a material which is the same as a material out of which the first covering portion is made, the second covering portion covering the second surface;
- a protruding portion protruding from a part of the side surface, and made of a material which is the same as a material out of which the member is made;
- and
- a connecting portion formed adjacent to the protruding portion on the part of the side surface, and made of a material which is the same as the material out of which the first covering portion is made, the connecting portion connecting the first covering portion and the second covering portion to each other,
- wherein the protruding portion and the connecting portion are integrated with each other so as to form a projecting portion.
4 more elements
A method of manufacturing a plastic optical element comprising;
- arranging a member including a first surface, a second surface opposite the first surface, a side surface, and a protruding portion protruding from a part of the side surface in a mold;
- and
- molding a covering portion on the first surface, a covering portion on the second surface, and a connecting portion adjacent to the protruding portion,
- wherein a space adjacent to the first surface, the second surface, and the protruding portion is formed in the mold while the protruding portion is brought into contact with the mold so as to be held by the mold, and
- wherein a plastic is injected into the spaces so that the covering portion of the first surface, the covering portion of the second surface, and the connecting portion are formed and connected to each other.
2 more elements
Dependencies are inferred from the claim text.