Panoramic lens assembly
AssigneesSintai Optical (Shenzhen) Co., Ltd., Asia Optical Co., Inc.
InventorChing-Chung Yeh
Life of this patent
Estimating the term…
Abstract
A panoramic lens assembly includes a first lens assembly which includes a first lens group, a first prism and a second lens group, all of which are arranged in order from a first object side to a first image side along a first optical axis. The first lens group is with negative refractive power and includes a first and a second lens. The first prism includes a first incident surface, a first reflective surface and a first exit surface. The second lens group is with positive refractive power and includes a third, a fourth, a fifth, a sixth and a seventh lens. The first lens assembly satisfies: 0.2≤TTL1/θ1m≤0.4, wherein TTL1 is an interval in mm from an object surface of the first lens to a first image plane along the first optical axis and θ1m is a half maximum field of view in degree for the first lens assembly.
Claims20
A panoramic lens assembly, comprising a first lens assembly, wherein:
- the first lens assembly comprises a first lens group, a first prism and a second lens group, all of which are arranged in order from a first object side to a first image side along a first optical axis, wherein:
- the first lens group is with negative refractive power and comprises a first lens with negative refractive power and a second lens with negative refractive power, all of which are arranged in order from the first object side to the first image side along the first optical axis;
- the first prism comprises a first incident surface, a first reflective surface and a first exit surface, wherein the first incident surface faces an image side surface of the second lens;
- the second lens group is with positive refractive power and comprises a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, all of which are arranged in order from the first object side to the first image side along the first optical axis, wherein an object side surface of the third lens faces the first exit surface of the first prism and a refractive power of the third lens is opposite to a refractive power of the fifth lens;
- and
- the first lens assembly satisfies:
- 0.2≤TTL1/θ1m≤0.4, wherein TTL1 is an interval in mm from an object surface of the first lens to a first image plane along the first optical axis and θ1m is a half maximum field of view in degree for the first lens assembly.
A panoramic lens assembly, comprising a first lens assembly, wherein:
- the first lens assembly comprises a first lens group, a first prism and a second lens group, all of which are arranged in order from a first object side to a first image side along a first optical axis, wherein:
- the first lens group is with negative refractive power and comprises a first lens with negative refractive power and a second lens with negative refractive power, all of which are arranged in order from the first object side to the first image side along the first optical axis;
- the first prism comprises a first incident surface, a first reflective surface and a first exit surface, wherein the first incident surface faces an image side surface of the second lens;
- the second lens group is with positive refractive power and comprises a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, all of which are arranged in order from the first object side to the first image side along the first optical axis, wherein an object side surface of the third lens faces the first exit surface of the first prism and a refractive power of the third lens is opposite to a refractive power of the fifth lens;
- and
- the third lens and the fifth lens satisfy:
- 37≤Vd3−Vd5≤50, wherein Vd3 is an Abbe number of the third lens and Vd5 is an Abbe number of the fifth lens.
Dependencies are inferred from the claim text.