Optical lens assembly

Patent metadata

Field	Value
Publication number	US-12461345-B2
Application number	US-202318479838-A
Country	US
Kind code	B2
Filing date	Oct 3, 2023
Priority date	Sep 24, 2020
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

An optical lens assembly, sequentially including a first lens element to a sixth lens element from a first side to a second side along an optical axis, is provided. The optical lens assembly satisfies the conditional expressions of V1+V2+V6≤120.000 and EFL*Fno/D11t22≤11.500. Furthermore, other optical lens element assemblies are also provided.

First claim

What is claimed is:

1 . An optical lens assembly, sequentially comprising a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element from a first side to a second side along an optical axis, wherein the first side is a light-exiting side, the second side is a light-incident side, the optical lens assembly is used for projection, after multiple imaging rays sequentially pass through the sixth lens element, the fifth lens element, the fourth lens element, the third lens element, the second lens element and the first lens element and exit from the optical lens assembly, and each of the first lens element to the sixth lens element comprises a first side surface that faces the first side and allows the multiple imaging rays to pass through, and a second side surface that faces the second side and allows the multiple imaging rays to pass through;
when one of the first side surface and the second side surface has a transition point, at which a line tangent to the transition point is perpendicular to the optical axis, a region located radially outside of a farthest Nth transition point from the optical axis to an optical boundary of the one of the first side surface and the second side surface is defined as a periphery region; when one of the first side surface and the second side surface has no transition point, a region between 50%-100% of a distance between the optical axis and the optical boundary of the one of the first side surface and the second side surface is defined as a periphery region; an optical axis region of the first side surface of the sixth lens element is concave; an optical axis region of the first side surface of the fourth lens element is convex; wherein the optical lens assembly conforms to a following conditional expression:
T 2/ T avg ≥1.500; and

( T 1+ G 12+ T 2)/ G 23≤6.800,

where T1 is a thickness of the first lens element on the optical axis, T2 is a thickness of the second lens element on the optical axis, T avg is an average thickness of all of the lens elements of the optical lens assembly on the optical axis, G12 is an air gap between the first lens element and the second lens element on the optical axis, and G23 is an air gap between the second lens element and the third lens element on the optical axis.

2 . The optical lens assembly according to claim 1 , wherein an absolute value of a focal shift of the optical lens assembly at a temperature of 0° C.˜70° C. is less than or equal to 0.030 mm.

3 . The optical lens assembly according to claim 1 , wherein the optical lens assembly further conforms to a following conditional expression:
EFL* Fno/D 11 t 22≤11.500,
where EFL is an effective focal length of the optical lens assembly, Fno is an f-number of the optical lens assembly, and D11t22 is a distance from the first side surface of the first lens element to the second side surface of the second lens element on the optical axis.

4 . The optical lens assembly according to claim 1 , wherein the optical lens assembly further conforms to a following conditional expression:
TTL/ D 31 t 51≤4.000,
where TTL is a distance from the first side surface of the first lens element to a reference surface on the optical axis, and D31t51 is a distance from the first side surface of the third lens element to the first side surface of the fifth lens element on the optical axis.

5 . The optical lens assembly according to claim 1 , wherein the optical lens assembly further conforms to a following conditional expression:
TL*Fno /EFL≤3.000,
where TL is a distance from the first side surface of the first lens element to the second side surface of the sixth lens element on the optical axis, Fno is an f-number of the optical lens assembly, and EFL is an effective focal length of the optical lens assembly.

6 . The optical lens assembly according to claim 1 , wherein
an optical axis region of the second side surface of the second lens element is concave; the periphery region of the first side surface of the fourth lens element is concave; the periphery region of the first side surface of the fifth lens element is concave; the optical lens assembly further conforms to a following conditional expression:
V 1+ V 2+ V 6≤120.000;and

ALT46/ T 3≤3.100,

where V1 is an Abbe number of the first lens element, V2 is an Abbe number of the second lens element, V6 is an Abbe number of the sixth lens element, and ALT46 is a sum of thicknesses of the fourth lens element, thicknesses of the fifth lens element and thicknesses of the sixth lens element on the optical axis, and T3 is a thickness of the third lens element on the optical axis.

7 . The optical lens assembly according to claim 1 , wherein the optical lens assembly further conforms to a following conditional expression:
TL /( G 23+ G 34+ G 45+ G 56)≤3.700,
where TL is a distance from the first side surface of the first lens element to the second side surface of the sixth lens element on the optical axis, G34 is an air gap between the third lens element and the fourth lens element on the optical axis, G45 is an air gap between the fourth lens element and the fifth lens element on the optical axis, and G56 is an air gap between the fifth lens element and the sixth lens element on the optical axis.

8 . An optical lens assembly, sequentially comprising a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element from a first side to a second side along an optical axis, wherein the first side is a light-exiting side, the second side is a light-incident side, the optical lens assembly is used for projection, after multiple imaging rays sequentially pass through the sixth lens element, the fifth lens element, the fourth lens element, the third lens element, the second lens element and the first lens element and exit from the optical lens assembly, and each of the first lens element to the sixth lens element comprises a first side surface that faces the first side and allows the multiple imaging rays to pass through, and a second side surface that faces the second side and allows the multiple imaging rays to pass through;
when one of the first side surface and the second side surface has a transition point, at which a line tangent to the transition point is perpendicular to the optical axis, a region located radially outside of a farthest Nth transition point from the optical axis to an optical boundary of the one of the first side surface and the second side surface is defined as a periphery region; when one of the first side surface and the second side surface has no transition point, a region between 50%-100% of a distance between the optical axis and the optical boundary of the one of the first side surface and the second side surface is defined as a periphery region; the periphery region of the second side surface of the first lens element is concave; an optical axis region of the first side surface of the fourth lens element is convex; the periphery region of the first side surface of the sixth lens element is concave; wherein the optical lens assembly conforms to a following conditional expression:
T 2/ T avg ≥1.500; and

T 1+ G 12+ T 2)/ G 23≤6.800,

where T1 is a thickness of the first lens element on the optical axis, T2 is a thickness of the second lens element on the optical axis, T avg is an average thickness of all of the lens elements of the optical lens assembly on the optical axis, G12 is an air gap between the first lens element and the second lens element on the optical axis, and G23 is an air gap between the second lens element and the third lens element on t

Assignees

• Genius Electronic Optical Xiamen Co Ltd

Inventors

• Dong Chuanbo
• Zhu Qingzhi
• Zhou Ou
• Hsieh Hung-Chien

Classifications

• G02B27/0025

  for optical correction, e.g. distorsion, aberration · CPC title

• G02B9/62 Primary

  having six components only · CPC title

• G02B13/18

  with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)} · CPC title

• G02B27/0012

  Optical design, e.g. procedures, algorithms, optimisation routines · CPC title

• G02B27/0172

  characterised by optical features · CPC title