Optical lens assembly and photographing module
OwnerChun-Sheng Leeinventor
Life of this patent
Estimating the term…
Abstract
An optical lens assembly includes: a stop; and in order from an object side to an image side: a first lens; a second lens; a third lens; a fourth lens; and a fifth lens; wherein a distance from an image-side surface of the fifth lens to an image plane along an optical axis is BFL, a displacement in parallel to the optical axis from an intersection between the image-side surface of the fifth lens and the optical axis to a maximum effective radius position on the image-side surface of the fifth lens is TDP10, a maximum effective radius of the image-side surface of the fifth lens is CA10, a maximum image height of the optical lens assembly is IMH, and the following condition is satisfied: 1.98<(BFL−TDP10)/(CA10−IMH)<9.54.
Claims18
An optical lens assembly comprising:
- a stop;
- and
- in order from an object side to an image side:
- a first lens with negative refractive power, and an image-side surface of the first lens being concave in a paraxial region thereof;
- a second lens with refractive power, and an image-side surface of the second lens being concave in a paraxial region thereof;
- a third lens with positive refractive power;
- a fourth lens with positive refractive power;
- and
- a fifth lens with positive refractive power, an object-side surface of the fifth lens being convex in a paraxial region thereof, and an image-side surface of the fifth lens being concave in a paraxial region thereof;
- wherein a distance from the image-side surface of the fifth lens to an image plane along an optical axis is BFL, a displacement in parallel to the optical axis from an intersection between the image-side surface of the fifth lens and the optical axis to a maximum effective radius position on the image-side surface of the fifth lens is TDP10, a maximum effective radius of the image-side surface of the fifth lens is CA10, a maximum image height of the optical lens assembly is IMH, a focal length of the fourth lens is f4, an entrance pupil diameter of the optical lens assembly is EPD, and the following conditions are satisfied:
- 1.98<(BFL−TDP10)/(CA10−IMH)<9.54 and 2.99<f4/EPD<6.54.
A photographing module, comprising:
- a lens barrel;
- an optical lens assembly disposed in the lens barrel;
- and
- an image sensor disposed on an image plane of the optical lens assembly;
- wherein the optical lens assembly comprising:
- a stop;
- and in order from an object side to an image side:
- a first lens with negative refractive power, and an image-side surface of the first lens being concave in a paraxial region thereof;
- a second lens with refractive power, and an image-side surface of the second lens being concave in a paraxial region thereof;
- a third lens with positive refractive power;
- a fourth lens with positive refractive power;
- and
- a fifth lens with positive refractive power, an object-side surface of the fifth lens being convex in a paraxial region thereof, and an image-side surface of the fifth lens being concave in a paraxial region thereof;
- wherein a distance from the image-side surface of the fifth lens to the image plane along an optical axis is BFL, a displacement in parallel to the optical axis from an intersection between the image-side surface of the fifth lens and the optical axis to a maximum effective radius position on the image-side surface of the fifth lens is TDP10, a maximum effective radius of the image-side surface of the fifth lens is CA10, a maximum image height of the optical lens assembly is IMH, a focal length of the fourth lens is f4, an entrance pupil diameter of the optical lens assembly is EPD, and the following conditions are condition is satisfied:
- 1.98<(BFL−TDP10)/(CA10−IMH)<9.54 and 2.99<f4/EPD<6.54.
Dependencies are inferred from the claim text.