US 2019/0377158 A1Published application

Optical imaging lens

AssigneeGenius Electronic Optical (Xiamen) Co., Ltd.

InventorsHuabin Liao, Wenbin Lin, Hai Lin

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Abstract

An optical imaging lens may include a first, a second, a third, and a fourth lens elements positioned in an order from an object side to an image side along an optical axis. Through designing concave and/or convex surfaces of the four lens elements, the optical imaging lens may provide improved imaging quality and optical characteristics, and have the ability to cooperate the demand of present smaller-sized electronic product while the optical imaging lens may satisfy TTL/TL≥1.700 and EFL/ImgH≥2.500, wherein a distance from the object-side surface of the first lens element to an image plane along the optical axis is represented by TTL, a distance from the object-side surface of the first lens element to the image-side surface of the fourth lens element along the optical axis is represented by TL, an effective focal length of the optical imaging lens is represented by EFL, and an image height of the optical imaging lens is represented by ImgH.

An optical imaging lens comprising a first lens element, a second lens element, a third lens element and a fourth lens element sequentially from an object side to an image side along an optical axis, each of the first, second, third and fourth lens elements having an object-side surface facing toward the object side along an optical axis and allowing imaging rays to pass through as well as an image-side surface facing toward the image side along an optical axis and allowing the imaging rays to pass through, wherein:

the first lens element is arranged to be a lens element having refracting power in a first order from the object side to the image side along the optical axis;
the second lens element is arranged to be a lens element having refracting power in a second order from the object side to the image side along the optical axis;
a periphery region of the object-side surface of the second lens element is convex;
the third lens element is arranged to be a lens element having refracting power in a second order from the image side to the object side along the optical axis;
an optical axis region of the object-side surface of the third lens element is concave;
a periphery region of the image-side surface of the third lens element is convex;
the fourth lens element is arranged to be a lens element having refracting power in a first order from the image side to the object side along the optical axis;
a periphery region of the object-side surface of the fourth lens element is concave;
an optical axis region of the image-side surface of the fourth lens element is concave;
a distance from the object-side surface of the first lens element to an image plane along the optical axis is represented by TTL;
a distance from the object-side surface of the first lens element to the image-side surface of the fourth lens element along the optical axis is represented by TL;
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;
and
the optical imaging lens satisfies inequalities:
TTL/TL≥1.700 and EFL/ImgH≥2.500.

13 more elements

Facts

Application

16/043,311Filed 24 Jul 2018

Priority

CN 201810586060.48 Jun 2018

Published

12 Dec 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

G02B 3/04
With non-spherical faces: with continuous faces that are rotationally symmetrical but deviate from a true sphere , e.g. so called "aspheric" lenses
G02B 9/34
Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -: having four…
G02B 7/10
With mechanism for focusing or varying magnification: by relative axial movement of several lenses, e.g. of varifocal objective lens
G02B 9/60
Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -: having five…

Abstract

Claims20