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US 2019/0094503 A1Published application
Optical system and imaging apparatus including the same
AssigneeCanon Kabushiki Kaisha
InventorShinichiro Saito
Life of this patent
Estimating the term…
Abstract
An optical system includes a positive lens G1 arranged closest to the object side and a positive lens G2 arranged closest to the object side among positive lenses at the image side of the positive lens G1. The optical system satisfies a predetermined condition.
Claims20
An optical system comprising:
- a positive lens G1 arranged closest to an object side;
- and
- a positive lens G2 arranged closest to the object side among a plurality of positive lenses at an image side of the positive lens G1,
- wherein the optical system satisfies the following conditions:
- LD/f<1.000
- 82.73<νdA
- 0.200<D12/LD<0.600
- where LD is a distance on an optical axis from an object-side surface of the positive lens G1 to an image plane of the optical system, f is a focal length of the optical system, νdA is a value obtained by averaging an Abbe number of the positive lens G1 and an Abbe number of the positive lens G2, and D12 is a distance on the optical axis from a lens arranged adjacent to the positive lens G1 on the image side to the positive lens G1.
5 more elements
An optical system comprising:
- a positive lens G1 arranged closest to an object side;
- and
- a positive lens G2 arranged closest to the object side among a plurality of positive lenses at an image side of the positive lens G1,
- wherein the optical system satisfies the following conditions:
- LD/f<1.000
- 73.00<νdG1
- 73.00<νdG2
- 0.200<D12/LD<0.600
- where LD is a distance on an optical axis from an object-side surface of the positive lens G1 to an image plane of the optical system, f is a focal length of the optical system, νdG1 is an Abbe number of the positive lens G1, νdG2 is an Abbe number of the positive lens G2, and D12 is a distance on the optical axis from a lens arranged adjacent to the positive lens G1 on the image side to the positive lens G1.
6 more elements
An imaging apparatus comprising:
- an optical system;
- and an image sensor that receives light of an image formed by the optical system,
- wherein the optical system includes
- a positive lens G1 arranged closest to an object side, and
- a positive lens G2 arranged closest to the object side among a plurality of positive lenses at an image side of the positive lens G1, and
- wherein the optical system satisfies the following conditions:
- LD/f<1.000
- 82.73<νdA
- 0.200<D12/LD<0.600
- where LD is a distance on an optical axis from an object-side surface of the positive lens G1 to an image plane of the optical system, f is a focal length of the optical system, νdA is a value obtained by averaging an Abbe number of the positive lens G1 and an Abbe number of the positive lens G2, and D12 a distance on the optical axis from a lens arranged adjacent to the positive lens G1 on the image side to the positive lens G1.
7 more elements
Dependencies are inferred from the claim text.