Compact optical image capturing system

• US 10,139,603 B2
• Filed: 12/20/2016
• Issued: 11/27/2018
• Est. Priority Date: 09/01/2016
• Status: Active Grant

• Current Assignee: Ability Opto-Electronics Technology Co., Ltd.
• Original Assignee: Ability Opto-Electronics Technology Co., Ltd.
• Inventors: Lai, Chien-Hsun, Liao, Kuo-Yu, Jhang, Bo-Guang, Tang, Nai-Yuan, Chang, Yeong-Ming
• Primary Examiner(s): Lavarias, Arnel C
• Application Number:
  US15/384,759
• Publication Number:
  US 20180059366A1
• Time in Patent Office: 707 Days
• Field of Search: 359362, 359363, 359642, 359763, 359770, 359739, 359740
• CPC Class Codes: G02B 13/0045 having five or more lenses
• CPC Class Codes: G02B 13/008 designed for infrared light
• CPC Class Codes: G02B 27/0025 for optical correction, e.g. distorsion, aberration
• CPC Class Codes: G02B 5/005 Diaphragms for cameras G03B9/02
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 9/60 having five components only

Abstract

An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. At least one lens among the first to the fifth lenses has positive refractive force. The fifth lens can have negative refractive force. The lenses in the optical image capturing system which have refractive power include the first to the fifth lenses. The optical image capturing system can increase aperture value and improve the imaging 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 perpendicular to 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

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

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≤

150 deg; and

|FS|≤

60 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 in parallel with 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;

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 at least two lenses among the first lens to the fifth lens are made of plastic.

5. The optical image capturing system of claim 1, wherein half of a vertical maximum viewable angle of the optical image capturing system is denoted by VHAF, and the following condition is satisfied:

VHAF≥

10 deg.

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

HOS/HOI≥

1.2.

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 perpendicular to 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 perpendicular to 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 two lenses among the first lens to the fifth lens are 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≤

150 deg;

|FS|≤

60 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 in parallel with the optical axis from the object-side surface of the first lens to the image-side surface of the third lens;

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

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, wherein each two neighboring lenses among the first to the seventh lenses are separated by air.

12. 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.

13. The optical image capturing system of claim 10, wherein all lens among the first lens to the fifth lens are made of plastic.

14. The optical image capturing system of claim 10, wherein half of a vertical maximum viewable angle of the optical image capturing system is denoted by VHAF, and the following condition is satisfied:

VHAF≥

20 deg.

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

HOS/HOI≥

1.4.

16. The optical image capturing system of claim 10, wherein at least one lens among the first lens to the fifth lens is a light filter, which is capable of filtering out light of wavelengths shorter than 500 nm.

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;

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 one lens 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, and 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≤

f/HEP≤

10;

0 deg<

HAF≤

150 deg;

|AFS|≤

60 μ

m; and

0.9≤

2(ARE/HEP)≤

2.0;

where f1, 12, 13, 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 in parallel with 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, 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.

22. The optical image capturing system of claim 20, wherein each two neighboring lenses among the first to the seventh lenses are separated by air.

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

HOS/HOI≥

1.6.

24. The optical image capturing system of claim 20, wherein a linear magnification of an image formed by the optical image capturing system on the second average image plane is LM, which satisfies the following condition:

LM≥

0.0003.

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;

0.2≤

InS/HOS≤

1.1;

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