Optical imaging lens
AssigneeGenius Electronic Optical (Xiamen) Co., Ltd.
InventorsFeng Chen, Yanxuan Yin, Citian You
Life of this patent
Estimating the term…
Abstract
The present invention provides an optical imaging lens. The optical imaging lens comprises five lens elements positioned in an order from an object side to an image side, each of which has an object-side surface facing the object side and an image-side surface facing the image side. Counting from the object side to the image side, the five lens are labeled as a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element, all of which have refracting power. Through controlling a variable air gap formed between two adjacent lens elements and parameters to meet an inequality, adjustment distance required for focusing the optical imaging lens will be shortened.
Claims19
An optical imaging lens, comprising a first element, a second element, a third element, a fourth element and a fifth lens element sequentially from an object side to an image side along an optical axis, each of the first, second, third, fourth and fifth lens element having an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
- the first lens element being arranged to be a lens element having refracting power in a first order from the object side to the image side, the second lens element being arranged to be a lens element having refracting power in a second order from the object side to the image side, the third lens element being arranged to be a lens element having refracting power in a third order from the object side to the image side, the fourth lens element being arranged to be a lens element having refracting power in a fourth order from the object side to the image side, the fifth lens element being arranged to be a lens element having refracting power in a fifth order from the object side to the image side;
- the optical imaging lens has an adjustable air gap between two adjacent lens elements;
- the optical imaging lens comprises no greater than seven lens elements having refracting power;
- and
- an effective focal length of the optical imaging lens is represented by EFL, an image height of the optical imaging lens is represented by ImgH, a sum of the thicknesses of five lens elements from the first lens element to the fifth lens element along the optical axis is represented by ALT, a sum of four air gaps from the first lens element to the fifth lens element along the optical axis is represented by AAG, and EFL, ImgH, ALT and AAG satisfy:
- 6.900≤EFL/ImgH and 1.300≤ALT/AAG.
An optical imaging lens, comprising a first element, a second element, a third element, a fourth element and a fifth lens element sequentially from an object side to an image side along an optical axis, each of the first, second, third, fourth and fifth lens element having an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
- the first lens element being arranged to be a lens element having refracting power in a first order from the object side to the image side, the second lens element being arranged to be a lens element having refracting power in a second order from the object side to the image side, the third lens element being arranged to be a lens element having refracting power in a third order from the object side to the image side, the fourth lens element being arranged to be a lens element having refracting power in a fourth order from the object side to the image side, the fifth lens element being arranged to be a lens element having refracting power in a fifth order from the object side to the image side;
- the optical imaging lens has an adjustable air gap between two adjacent lens elements;
- the optical imaging lens comprises no greater than seven lens elements having refracting power;
- and
- a distance from the object-side surface of the first lens element to an image plane along the optical axis is represented by TTL, an image height of the optical imaging lens is represented by ImgH, a sum of the thicknesses of five lens elements from the first lens element to the fifth lens element along the optical axis is represented by ALT, a sum of four air gaps from the first lens element to the fifth lens element along the optical axis is represented by AAG, an effective focal length of the optical imaging lens is represented by EFL, a focal length of a lens-group between the object side and a first adjustable air gap, wherein the first adjustable air gap is an adjustable air gap in a first order from the object side to the image side, is represented by fG, and TTL, ImgH, ALT, AAG, EFL and fG satisfy:
- 6.900≤EFL/ImgH, 1.300≤ALT/AAG and 1.200≤EFL/fG.
An optical imaging lens, comprising a first element, a second element, a third element, a fourth element and a fifth lens element sequentially from an object side to an image side along an optical axis, each of the first, second, third, fourth and fifth lens element having an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
- the first lens element being arranged to be a lens element having refracting power in a first order from the object side to the image side, the second lens element being arranged to be a lens element having refracting power in a second order from the object side to the image side, the third lens element being arranged to be a lens element having refracting power in a third order from the object side to the image side, the fourth lens element being arranged to be a lens element having refracting power in a fourth order from the object side to the image side, the fifth lens element being arranged to be a lens element having refracting power in a fifth order from the object side to the image side;
- the optical imaging lens has an adjustable air gap between two adjacent lens elements;
- an absolute value of maximum difference in distance between before and after adjusting the adjustable air gap is less or equal to 1.000 mm, and the maximum difference in distance between before and after adjusting the adjustable air gap is a distance of an adjustable air gap when the optical imaging lens focuses on an object at 1.200 m at 60° C. minus a distance of an adjustable air gap when the optical imaging lens focuses on an object at infinity at 20° C.;
- the optical imaging lens comprises no greater than seven lens elements having refracting power;
- and
- a half field of view of the optical imaging lens is represented by HFOV, an image height of the optical imaging lens is represented by ImgH, and HFOV and ImgH satisfy:
- HFOV/ImgH≤3.800°/mm.
Dependencies are inferred from the claim text.