OPTICAL IMAGE CAPTURING SYSTEM

• US 20190302420A1
• Filed: 06/28/2018
• Published: 10/03/2019
• Est. Priority Date: 03/28/2018
• Status: Active Grant

• Current Assignee: Ability Opto-Electronics Technology Co., Ltd.
• Original Assignee: Ability Opto-Electronics Technology Co., Ltd.
• Inventors: CHANG, YEONG-MING, LAI, CHIEN-HSUN, LIU, YAO-WEI
• Granted Patent: US 10,641,997 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 13/0045 having five or more lenses
• CPC Class Codes: G02B 13/14 for use with infrared or ultraviolet radiation G02B13/008, G02B13/16 take precedence
• CPC Class Codes: G02B 9/60 having five components only
• CPC Class Codes: H04N 23/11 for generating image signals from visible and infrared light wavelengths
• CPC Class Codes: H04N 23/55 Optical parts specially adapted for electronic image sensors; Mounting thereof
• CPC Class Codes: H04N 23/75 by influencing optical camera components

Abstract

The invention discloses a five-piece optical lens for capturing image and a five-piece optical module for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with refractive power; a second lens with refractive power, a third lens with refractive power; a fourth lens with refractive power; a fifth lens with refractive power, and at least one of the image-side surface and object-side surface of each of the five lens elements is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Claims

1. An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:

a first lens having refractive power;

a second lens having refractive power;

a third lens having refractive power,

a fourth lens having refractive power;

a fifth lens having refractive power;

a first image plane, which is an image plane specifically for visible light and located at a position of the optical axis with a through-focus modulation transfer rate (value of MTF) at a first spatial frequency having a maximum value; and

a second image plane, which is an image plane specifically for infrared light and located at a position of the optical axis with the through-focus modulation transfer rate (value of MTF) at the first spatial frequency having a maximum value;

wherein the optical image capturing system consists of the five lenses with refractive power, at least one lens among the first lens to the fifth lens is made of plastic;

at least one lens among the first lens to the fifth lens has positive refractive power;

each lens among the first lens to the fifth lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side;

wherein the optical image capturing system satisfies;

1.0≤

f/HEP≤

10.0;

0 deg<

HAF≤

50 deg; and

|FS|≤

15 μ

m;

where f1, f2, f3, f4, and f5 are focal lengths of the first lens to the fifth lens, respectively;

f is a focal length of the optical image capturing system;

HEP is an entrance pupil diameter of the optical image capturing system;

HOS is a distance between an object-side surface of the first lens and the first image plane on the optical axis;

HOI is a maximum image height on the first image plane perpendicular to the optical axis;

InTL is a distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fifth lens;

HAF is a half of a maximum view angle of the optical image capturing system;

for any surface of any lens;

FS is a distance on the optical axis between the first image plane and the second image plane.

2. The optical image capturing system of claim 1, wherein a wavelength of the infrared light ranges from 700 nm to 1300 nm, and the first spatial frequency is denoted by SP1, which satisfies the following condition:

SP1≤

440 cycles/mm.

3. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:

0.9≤

2(ARE/HEP)≤

2.0;

where ARE is a profile curve length measured from a start point where the optical axis of the belonging optical image capturing system passes through the surface of the lens, along a surface profile of the lens, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis.

4. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:

IN23>

IN34;

where IN23 is a distance on the optical axis between the second lens and the third lens, and IN34 is a distance on the optical axis between the third lens and the fourth lens.

5. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:

IN23>

IN45;

where IN23 is a distance on the optical axis between the second lens and the third lens, and IN45 is a distance on the optical axis between the fourth lens and the fifth lens.

6. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:

0<

HOS/HOI≤

1.6.

7. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:

0.05≤

ARE51/TP5≤

25; and

0.05≤

ARE52/TP5≤

25;

where ARE51 is a profile curve length measured from a start point where the optical axis passes the object-side surface of the fifth lens, along a surface profile of the object-side surface of the fifth lens, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis;

ARE52 is a profile curve length measured from a start point where the optical axis passes the image-side surface of the fifth lens, along a surface profile of the image-side surface of the fifth lens, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis;

TP5 is a thickness of the fifth lens on the optical axis.

8. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:

PLTA≤

200 μ

m;

PSTA≤

200 μ

m;

NLTA≤

200 μ

m;

NSTA≤

200 μ

m;

SLTA≤

200 μ

m;

SSTA≤

200 μ

m; and

|TDT|≤

250%;

where TDT is a TV distortion;

HOI is a maximum height for image formation perpendicular to the optical axis on the image plane;

PLTA is a transverse aberration at 0.7 HOI on the image plane in the positive direction of a tangential fan of the optical image capturing system after a longest operation wavelength of visible light passing through an edge of the aperture, PSTA is a transverse aberration at 0.7 HOI on the image plane in the positive direction of the tangential fan after a shortest operation wavelength of visible light passing through the edge of the aperture;

NLTA is a transverse aberration at 0.7 HOI on the image plane in the negative direction of the tangential fan after the longest operation wavelength of visible light passing through the edge of the aperture;

NSTA is a transverse aberration at 0.7 HOI on the image plane in the negative direction of the tangential fan after the shortest operation wavelength of visible light passing through the edge of the aperture;

SLTA is a transverse aberration at 0.7 HOI on the image plane of a sagittal fan of the optical image capturing system after the longest operation wavelength of visible light passing through the edge of the aperture;

SSTA is a transverse aberration at 0.7 HOI on the image plane of a sagittal fan after the shortest operation wavelength of visible light passing through the edge of the aperture.

9. The optical image capturing system of claim 1, further comprising an aperture, wherein the optical image capturing system further satisfies:

0.2≤

InS/HOS≤

1.1;

where InS is a distance between the aperture and the first image plane on the optical axis.

10. An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:

a first lens having refractive power;

a second lens having refractive power;

a third lens having refractive power,

a fourth lens having refractive power,

a fifth lens having refractive power;

a first image plane, which is an image plane specifically for visible light and located at a position of the optical axis;

a through-focus modulation transfer rate (value of MTF) at a first spatial frequency having a maximum value at central field of view of the first image plane, and the first spatial frequency being 110 cycles/mm; and

a second image plane, which is an image plane specifically for infrared light and located at a position of the optical axis;

the through-focus modulation transfer rate (value of MTF) at the first spatial frequency having a maximum value at central of field of view of the second image plane, and the first spatial frequency being 110 cycles/mm;

wherein the optical image capturing system consists of the five lenses with refractive power;

at least one lens among the first lens to the fifth lens has positive refractive power;

each lens among the first lens to the fifth lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side;

wherein the optical image capturing system satisfies;

1.0≤

f/HEP≤

0.0;

0 deg<

HAF≤

50 deg;

|FS|≤

0 μ

m; and

0.9≤

2(ARE/HEP)≤

2.0;

where f1, f2, f3, f4, and f5 are focal lengths of the first lens to the fifth lens, respectively;

f is a focal length of the optical image capturing system;

HEP is an entrance pupil diameter of the optical image capturing system;

HOS is a distance between the object-side surface of the first lens and the first image plane on the optical axis;

InTL is a distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fifth lens;

HAF is a half of a maximum view angle of the optical image capturing system;

for any surface of any lens;

FS is a distance on the optical axis between the first image plane and the second image plane;

ARE is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis.

11. The optical image capturing system of claim 10, further comprising an aperture which is disposed before the image-side surface of the second lens.

12. The optical image capturing system of claim 10, wherein the optical image capturing system further satisfies:

IN23>

IN34;

where IN23 is a distance on the optical axis between the second lens and the third lens, and IN34 is a distance on the optical axis between the third lens and the fourth lens.

13. The optical image capturing system of claim 10, wherein the optical image capturing system further satisfies:

IN23>

IN45;

where IN23 is a distance on the optical axis between the second lens and the third lens, and IN45 is a distance on the optical axis between the fourth lens and the fifth lens.

14. The optical image capturing system of claim 10, wherein the optical image capturing system further satisfies:

0<

HOS/HOI≤

1.6.

15. The optical image capturing system of claim 10, wherein the optical image capturing system further satisfies:

0.9≤

ARS/EHD≤

2.0;

where, for any surface of any lens, EHD is a maximum effective half diameter thereof, ARS is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to an end point of the maximum effective half diameter thereof.

16. The optical image capturing system of claim 10, wherein the first image plane and the second image plane are either flat or curved.

17. The optical image capturing system of claim 10, wherein the optical image capturing system further satisfies:

0<

IN45/f≤

5.0;

where IN45 is a distance on the optical axis between the fourth lens and the fifth lens.

18. The optical image capturing system of claim 10, wherein the optical image capturing system further satisfies:

0.1≤

(TP5+IN45)/TP4≤

50;

where IN45 is a distance on the optical axis between the fourth lens and the fifth lens;

TP4 is a thickness of the fourth lens on the optical axis;

TP5 is a thickness of the fifth lens on the optical axis.

19. The optical image capturing system of claim 10, wherein at least one surface of each of at least two lenses among the first lens to the fifth lens has at least an inflection point thereon.

20. An optical image capturing system, in order along an optical axis from an object side to an image side, comprising:

a first lens having refractive power;

a second lens having refractive power;

a third lens having refractive power;

a fourth lens having refractive power;

a fifth lens having refractive power;

a first average image plane, which is an image plane specifically for visible light and perpendicular to the optical axis;

the first average image plane being installed at the average position of the defocusing positions, where through-focus modulation transfer rates (values of MTF) of the visible light at central field of view, 0.3 field of view, and 0.7 field of view are at their respective maximum at a first spatial frequency;

the first spatial frequency being 110 cycles/mm; and

a second average image plane, which is an image plane specifically for infrared light and perpendicular to the optical axis;

the second average image plane being installed at the average position of the defocusing positions, where through-focus modulation transfer rates of the infrared light (values of MTF) at central field of view, 0.3 field of view, and 0.7 field of view are at their respective maximum at the first spatial frequency;

the first spatial frequency being 110 cycles/mm;

wherein the optical image capturing system consists of the five lenses having refractive power;

at least one lens among the first lens to the fifth lens has positive refractive power, each lens among the first lens to the fifth lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side;

wherein the optical image capturing system satisfies;

1≤

f/HEP≤

10;

0 deg<

HAF≤

50 deg;

|AFS|≤

20 μ

m; and

0.9≤

2(ARE/HEP)≤

2.0;

where f1, f2, f3, f4, and f5 are focal lengths of the first lens to the fifth lens, respectively;

f is a focal length of the optical image capturing system;

HEP is an entrance pupil diameter of the optical image capturing system;

HAF is a half of a maximum view angle of the optical image capturing system;

HOS is a distance between an object-side surface of the first lens and the image plane on the optical axis;

HOI is a maximum image height on the first image plane perpendicular to the optical axis;

InTL is a distance on the optical axis from the object-side surface of the first lens to the image-side surface of the fifth lens;

AFS is a distance on the optical axis between the first average image plane and the second average image plane;

ARE is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis.

21. The optical image capturing system of claim 20, further comprising an aperture which is disposed before the image-side surface of the second lens;

the optical image capturing system further satisfies;

0.5InS/HOS≤

1.1;

where InS is a distance on the optical axis between the aperture and the first image plane.

22. The optical image capturing system of claim 20, wherein the optical image capturing system further satisfies:

IN23>

IN34;

where IN23 is a distance on the optical axis between the second lens and the third lens, and IN34 is a distance on the optical axis between the third lens and the fourth lens.

23. The optical image capturing system of claim 20, wherein the optical image capturing system further satisfies:

IN23>

IN45;

where IN23 is a distance on the optical axis between the second lens and the third lens, and IN45 is a distance on the optical axis between the fourth lens and the fifth lens.

24. The optical image capturing system of claim 20, wherein the object-side surface of the fourth lens on the optical axis is a concave surface, and the image-side surface of the fourth lens on the optical axis is a convex surface.

25. The optical image capturing system of claim 20, further comprising an aperture and an image sensor, wherein the image sensing device is disposed on the first average image plane and comprises at least 100 thousand pixels;

the optical image capturing system further satisfies;

0.5≤

InS/HOS≤

1.1;

where InS is a distance between the aperture and the first average image plane on the optical axis.