Lens, lens unit, optical device, image pickup apparatus, and method of manufacturing lens
OwnerShunichi Miyazawa, Shigeo Urai +1inventors
InventorsSHUNICHI MIYAZAWA, SHIGEO URAI, SATOSHI INOUE
Life of this patent
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Abstract
Provided is a lens which has an aspherical surface and is capable of capturing an image in a wide range, and which is more stably provided. The lens includes a first part, which is made of a first material, and has a concave surface; and a second part, which is made of a second material, and is to be bonded to the concave surface side of the first part. The second part is formed into a ring shape, and the second part defines a half aperture angle of a ray effective diameter to an angle of 65 degrees or more and 90 degrees or less.
Claims12
A lens comprising:
- a first part, which is made of a first material, and has a concave surface;
- and
- a second part, which is made of a second material, and is configured to be bonded to the concave surface side of the first part,
- wherein the second part is formed into a ring shape, and the second part defines a half aperture angle of a ray effective diameter to an angle of 65 degrees or more and 90 degrees or less.
A lens comprising:
- a first part, which is made of a first material, and has a concave surface;
- and
- a second part, which is made of a second material, and is configured to be bonded to the concave surface side of the first part,
- wherein the second material has a center thickness of 0.0005 mm or more and 0.01 mm or less, and the second part defines a half aperture angle of a ray effective diameter to an angle of 65 degrees or more and 90 degrees or less.
A method of manufacturing a lens, the method comprising:
- forming, on a side of a concave surface of a first part which is made of a first material, a second part between a mold and the concave surface using a second material to have a center thickness of 0.01 mm or less;
- cooling the first part from a side opposite to the side of the first part on which the concave surface is formed;
- cooling the mold via a center portion of the second part;
- and
- separating the mold from the second part,
- wherein the separation uses deformation of the first part due to the cooling of the first part and deformation of the mold due to the cooling of the mold.
Dependencies are inferred from the claim text.