Interactive lens assembly

Patent metadata

Field	Value
Publication number	US-9977221-B2
Application number	US-201515504568-A
Country	US
Kind code	B2
Filing date	Oct 28, 2015
Priority date	Apr 8, 2015
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

Provided is an interactive lens assembly, including first lens, a second lens, an aperture stop, a third lens and a filter from an object side of the interactive lens assembly to an image side of the interactive lens assembly in turn. The first lens is of a negative focal power, an image side surface of the first lens is concave; the second lens is of a focal power; the third lens is of a positive focal power, an image side surface of the third lens is convex, and each of the first lens, the second lens and the third lens is made of a plastic material; the interactive lens assembly meets the following formulas: (CT 1 +CT 2 )/CT 3 <0.9; and ImgH/(f*TTL)≥0.4 mm −1 .

First claim

What is claimed is:

1. An interactive lens assembly, comprising a first lens, a second lens, an aperture stop, a third lens and a filter from an object side of the interactive lens assembly to an image side of the interactive lens assembly in turn, wherein
the first lens is of a negative focal power, an image side surface of the first lens is concave;
the second lens is of a focal power;
the third lens is of a positive focal power, an image side surface of the third lens is convex,
wherein each of the first lens, the second lens and the third lens is made of a plastic material,
the interactive lens assembly meets the following formulas:
( CT 1 +CT 2)/ CT 3<0.9; and
ImgH/ ( f*TTL )≥0.4 mm −1 ,

wherein CT 1 represents a central thickness of the first lens,
CT 2 represents a central thickness of the second lens,
CT 3 represents a central thickness of the third lens,
ImgH represents half of a length of an effective pixel region diagonal of the interactive lens assembly at an imaging surface,
f represents an effective focal length of the interactive lens assembly, and
TTL represents a full length of the interactive lens assembly.

2. The interactive lens assembly according to claim 1 , wherein the filter is a band pass filter, and a band pass wavelength is between a wavelength of light source used ±15 nm and the wavelength of light source used ±50 nm.

3. The interactive lens assembly according to claim 2 , wherein an object side surface of the first lens is convex.

4. The interactive lens assembly according to claim 1 , wherein the interactive lens assembly meets the following formula:
HFOV> 65°,

wherein HFOV represents half of a maximum field angle of the interactive lens assembly.

5. The interactive lens assembly according to claim 4 , wherein an object side surface of the first lens is convex.

6. The interactive lens assembly according to claim 1 , wherein the interactive lens assembly meets the following formula:
−3.5< f 1/ f<− 1,

wherein f1 represents a focal length of the first lens.

7. The interactive lens assembly according to claim 6 , wherein an object side surface of the first lens is convex.

8. The interactive lens assembly according to claim 1 , wherein the interactive lens assembly meets the following formula:
0.2<( T 12+ T 23)/ Dr 1 r 6<0.6,
wherein T 12 represents a distance between the first lens and the second lens along an optic axis,
T 23 represents a distance between the second lens and the third lens along the optic axis, and
Dr 1 r 6 represents a distance from an object side surface of the first lens to the image side surface of the third lens.

9. The interactive lens assembly according to claim 8 , wherein an object side surface of the first lens is convex.

10. The interactive lens assembly according to claim 1 , wherein the interactive lens assembly meets the following formulas:
−1.3< R 2/ R 6<−0.7; and

−0.8< SAG 32/ SD 32<−0.4,

wherein R 2 represents a curvature radius of the image side surface of the first lens,
R 6 represents a curvature radius of the image side surface of the third lens,
SAG 32 represents a vector height of the image side surface of the third lens, and
SD 32 represents a maximum effective radius of the image side surface of the third lens.

11. The interactive lens assembly according to claim 10 , wherein an object side surface of the first lens is convex.

12. The interactive lens assembly according to claim 10 , wherein the interactive lens assembly meets the following formula:
−2.6 <f 12 /f 3<−0.7,

wherein f12 represents a combined focal length of the first lens and the second lens, and
f3 represents a focal length of the third lens.

13. The interactive lens assembly according to claim 12 , wherein an object side surface of the first lens is convex.

14. The interactive lens assembly according to claim 1 , wherein an object side surface of the first lens is convex.

15. The interactive lens assembly according to claim 14 , wherein the second lens is of a positive focal power, an object side surface of the second lens is convex, and an image side surface of the second lens is concave.

16. The interactive lens assembly according to claim 15 , wherein an object side surface of the third lens is convex.

Assignees

• Zhejiang Sunny Optics Co Ltd

Inventors

• Huang Lin
• Dai Fujian

Classifications

• G02B13/04

  Reversed telephoto objectives · CPC title

• G02B9/16

  all the components being simple · CPC title

• G02B13/0035 Primary

  having three lenses · CPC title

• G02B9/12

  having three components only · CPC title

• G02B13/14

  for use with infrared or ultraviolet radiation ({G02B13/008, } G02B13/16 take precedence) · CPC title