Zoom lens and video camera using it
Zoom lens and video camera using it
 CN 1,596,376 A
 Filed: 11/22/2002
 Published: 03/16/2005
 Est. Priority Date: 11/28/2001
 Status: Active Application
First Claim
1. , a kind of lens of variable focal length has:
 The 1st lens combination, comprise dispose successively to the image planes side from object side, have negative dioptric lens and have positive dioptric lens and engage the joint lens that form and have positive dioptric lens, have positive diopter on the whole, and be fixed with respect to image planes;
The 2nd lens combination has negative diopter on the whole, by moving on optical axis, realizes becoming doubly effect;
Aperture is fixed with respect to abovementioned image planes;
The 3rd lens combination, by dispose successively to the image planes side from object side, have positive dioptric lens and have negative dioptric lens and constitute, have positive diopter on the whole, fix with respect to optical axis direction when becoming times and during focusing;
The 4th lens combination, by dispose successively to the image planes side from object side, have negative dioptric lens and have positive dioptric lens and constitute, have negative diopter on the whole, be fixed with respect to abovementioned image planes;
AndThe 5th lens combination, it has positive diopter on the whole, and moves on optical axis, makes along with abovementioned the 2nd lens combination remains on the position of reference field in the abovementioned image planes that change with moving of object that move on the optical axis, it is characterized in that;
Abovementioned the 2nd lens combination is made up of following 4 lens, the lens that engage of that promptly dispose successively to the image planes side from object side, negative meniscus, biconcave lens, convex lens and concavees lens;
Abovementioned the 3rd lens combination, the change of the image during for correction of jitter can be moved on the direction vertical with respect to optical axis;
Abovementioned the 4th lens combination is made of with the lens that engage of convex lens concavees lens;
Abovementioned the 5th lens combination by biconvex lens and biconcave lens engage lens and convex lens totally 3 lens constitute;
When the object side power of a lens of the joint lens of establishing abovementioned the 1st lens combination is φ
_{11}, abovementioned the 1st lens combination the image planes side power of a lens of joint lens be φ
_{12}, abovementioned the 1st lens combination the abbe number of object side lens of joint lens be υ
_{D11}, abovementioned the 1st lens combination the abbe number of image planes side lens of joint lens be υ
_{D12}The time, abovementioned the 1st lens combination satisfies the conditional of following formula 1. Formula 1;
75＜
ν
_{d11}ν
_{d12}(φ
_{11}+φ
_{12})/(φ
_{11}ν
_{d12}+φ
_{12}ν
_{d11})＜
50
Chinese PRB Reexamination
Abstract
A zoom lens capable of correcting camera shake and being reduced in size and weight, comprising five groups of lenses respectively having positive, negative, positive, negative, positive refractive powers, the second lens group ( 12 ) varying power, the fifth lens group ( 15 ) adjusting focusing. The third lens group ( 13 ) is moved in a direction perpendicular to the optical axis when correcting camera shake. When lens power on the object side of a cemented lens in the first lens group ( 11 ) is phi<SUB>11</SUB>, lens power on the image plane side phi<SUB>12</SUB>, the Abbe number of a lens on the object side nu<SUB>d11</SUB>, and the Abbe number of a lens on the image plane side nu<SUB>d12</SUB>, the condition of the following Expression 82 is satisfided.

7 Citations
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Filed 09/17/2018

Current Assignee

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Imaging len and camera device  
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Current Assignee

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Patent #
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Current Assignee

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No References
17 Claims

1. , a kind of lens of variable focal length has:

The 1st lens combination, comprise dispose successively to the image planes side from object side, have negative dioptric lens and have positive dioptric lens and engage the joint lens that form and have positive dioptric lens, have positive diopter on the whole, and be fixed with respect to image planes; The 2nd lens combination has negative diopter on the whole, by moving on optical axis, realizes becoming doubly effect; Aperture is fixed with respect to abovementioned image planes; The 3rd lens combination, by dispose successively to the image planes side from object side, have positive dioptric lens and have negative dioptric lens and constitute, have positive diopter on the whole, fix with respect to optical axis direction when becoming times and during focusing; The 4th lens combination, by dispose successively to the image planes side from object side, have negative dioptric lens and have positive dioptric lens and constitute, have negative diopter on the whole, be fixed with respect to abovementioned image planes;
AndThe 5th lens combination, it has positive diopter on the whole, and moves on optical axis, makes along with abovementioned the 2nd lens combination remains on the position of reference field in the abovementioned image planes that change with moving of object that move on the optical axis, it is characterized in that; Abovementioned the 2nd lens combination is made up of following 4 lens, the lens that engage of that promptly dispose successively to the image planes side from object side, negative meniscus, biconcave lens, convex lens and concavees lens; Abovementioned the 3rd lens combination, the change of the image during for correction of jitter can be moved on the direction vertical with respect to optical axis; Abovementioned the 4th lens combination is made of with the lens that engage of convex lens concavees lens; Abovementioned the 5th lens combination by biconvex lens and biconcave lens engage lens and convex lens totally 3 lens constitute; When the object side power of a lens of the joint lens of establishing abovementioned the 1st lens combination is φ
_{11}, abovementioned the 1st lens combination the image planes side power of a lens of joint lens be φ
_{12}, abovementioned the 1st lens combination the abbe number of object side lens of joint lens be υ
_{D11}, abovementioned the 1st lens combination the abbe number of image planes side lens of joint lens be υ
_{D12}The time, abovementioned the 1st lens combination satisfies the conditional of following formula 1.Formula 1; 75＜
ν
_{d11}ν
_{d12}(φ
_{11}+φ
_{12})/(φ
_{11}ν
_{d12}+φ
_{12}ν
_{d11})＜
50


2. lens of variable focal length as claimed in claim 1 is characterized in that:

In the joint lens of abovementioned the 5th lens combination, establishing, the radiusofcurvature of the face of close object side is r _{51}, the object side lens refractive index be n _{D51}, the most close image planes side the radiusofcurvature of face be r _{52}, image planes side lens refractive index be n _{D52}The time, satisfy the conditional of following formula 2. Formula 2; 0.85＜
(n _{d51}1)r _{52}/(n _{d52}1)r _{51}＜
1.2


3. lens of variable focal length as claimed in claim 1 is characterized in that:

In the joint lens of abovementioned the 5th lens combination, establishing the object side power of a lens is φ
_{51}, image planes side power of a lens is φ
_{52}, the object side lens abbe number be υ
_{D51}, image planes side lens abbe number be υ
_{D52}The time, satisfy the conditional of following formula 3.Formula 3; 2.0＜
ν
_{d51}ν
_{d52}(φ
_{51}+φ
_{52})/(φ
_{51}ν
_{d52}+φ
_{52}ν
_{d51})＜
8.0


4. , a kind of lens of variable focal length has:

The 1st lens combination, comprise dispose successively to the image planes side from object side, have negative dioptric lens and have positive dioptric lens and engage the joint lens that form and have positive dioptric lens, have positive diopter on the whole, and be fixed with respect to image planes; The 2nd lens combination has negative diopter on the whole, by moving on optical axis, realizes becoming doubly effect; Aperture is fixed with respect to abovementioned image planes; The 3rd lens combination, by dispose successively to the image planes side from object side, have positive dioptric lens and have negative dioptric lens and constitute, have positive diopter on the whole, fix with respect to optical axis direction when becoming times and during focusing; The 4th lens combination, by dispose successively to the image planes side from object side, have negative dioptric lens and have positive dioptric lens and constitute, have negative diopter on the whole, be fixed with respect to abovementioned image planes;
AndThe 5th lens combination, it has positive diopter on the whole, and moves on optical axis, makes along with abovementioned the 2nd lens combination remains on the position of reference field in the abovementioned image planes that change with moving of object that move on the optical axis, it is characterized in that; Abovementioned the 2nd lens combination is made up of following 4 lens, the lens that engage of that promptly dispose successively to the image planes side from object side, negative meniscus, biconcave lens, convex lens and concavees lens; Abovementioned the 3rd lens combination, the change of the image during for correction of jitter can be moved on the direction vertical with respect to optical axis; Abovementioned the 4th lens combination is made of with the lens that engage of convex lens concavees lens; Abovementioned the 5th lens combination by triple joint lens of biconvex lens and biconcave lens and biconvex lens and convex lens totally 4 lens constitute; When the object side power of a lens of the joint lens of establishing abovementioned the 1st lens combination is φ
_{11}, abovementioned the 1st lens combination the image planes side power of a lens of joint lens be φ
_{12}, abovementioned the 1st lens combination the abbe number of object side lens of joint lens be υ
_{D11}, abovementioned the 1st lens combination the abbe number of image planes side lens of joint lens be υ
_{D12}The time, abovementioned the 1st lens combination satisfies the conditional of following formula 4.Formula 4; 75＜
ν
_{d11}ν
_{d12}(φ
_{11}+φ
_{12})/(φ
_{11}ν
_{d12}+φ
_{12}ν
_{d11})＜
50


5. lens of variable focal length as claimed in claim 4 is characterized in that:
In triple joint lens of abovementioned the 5th lens combination, at least 3 radiusofcurvature equates.

6. , a kind of lens of variable focal length has:

The 1st lens combination, comprise dispose successively to the image planes side from object side, have negative dioptric lens and have positive dioptric lens and have positive dioptric lens, have positive diopter on the whole, and be fixed with respect to image planes; The 2nd lens combination has negative diopter on the whole, by moving on optical axis, realizes becoming doubly effect; Aperture is fixed with respect to abovementioned image planes; The 3rd lens combination, by dispose successively to the image planes side from object side, have positive dioptric lens and have negative dioptric lens and constitute, have positive diopter on the whole, fix with respect to optical axis direction when becoming times and during focusing; The 4th lens combination, by dispose successively to the image planes side from object side, have negative dioptric lens and have positive dioptric lens and constitute, have negative diopter on the whole, be fixed with respect to abovementioned image planes;
AndThe 5th lens combination, it has positive diopter on the whole, and moves on optical axis, makes along with abovementioned the 2nd lens combination remains on the position of reference field in the abovementioned image planes that change with moving of object that move on the optical axis, it is characterized in that; Abovementioned the 2nd lens combination is made up of following 4 lens, the lens that engage of that promptly dispose successively to the image planes side from object side, negative meniscus, biconcave lens, convex lens and concavees lens; Abovementioned the 3rd lens combination, the change of the image during for correction of jitter can be moved on the direction vertical with respect to optical axis; Abovementioned the 4th lens combination is made of 2 simple lenses of concavees lens and convex lens; Abovementioned the 5th lens combination is made of 3 lens; When the object side power of a lens of the joint lens of establishing abovementioned the 1st lens combination is φ
_{11}, abovementioned the 1st lens combination the image planes side power of a lens of joint lens be φ
_{12}, abovementioned the 1st lens combination the abbe number of object side lens of joint lens be υ
_{D11}, abovementioned the 1st lens combination the abbe number of image planes side lens of joint lens be υ
_{D12}The time, abovementioned the 1st lens combination satisfies the conditional of following formula 5.Formula 5; 75＜
ν
_{d11}ν
_{d12}(φ
_{11}+φ
_{12})/(φ
_{11}ν
_{d12}+φ
_{12}ν
_{d11})＜
50


7. , a kind of lens of variable focal length has:

The 1st lens combination, comprise dispose successively to the image planes side from object side, have negative dioptric lens and have positive dioptric lens and have positive dioptric lens, have positive diopter on the whole, and be fixed with respect to image planes; The 2nd lens combination has negative diopter on the whole, by moving on optical axis, realizes becoming doubly effect; Aperture is fixed with respect to abovementioned image planes; The 3rd lens combination, by dispose successively to the image planes side from object side, have positive dioptric lens and have negative dioptric lens and constitute, have positive diopter on the whole, fix with respect to optical axis direction when becoming times and during focusing; The 4th lens combination, by dispose successively to the image planes side from object side, have negative dioptric lens and have positive dioptric lens and constitute, have negative diopter on the whole, be fixed with respect to abovementioned image planes;
AndThe 5th lens combination, it has positive diopter on the whole, and moves on optical axis, makes along with abovementioned the 2nd lens combination remains on the position of reference field in the abovementioned image planes that change with moving of object that move on the optical axis, it is characterized in that; Abovementioned the 2nd lens combination is made up of following 4 lens, the lens that engage of that promptly dispose successively to the image planes side from object side, negative meniscus, biconcave lens, convex lens and concavees lens; Abovementioned the 3rd lens combination, the change of the image during for correction of jitter can be moved on the direction vertical with respect to optical axis; Abovementioned the 4th lens combination is made of 2 simple lenses of concavees lens and convex lens; Abovementioned the 5th lens combination is made of 4 lens; When the object side power of a lens of the joint lens of establishing abovementioned the 1st lens combination is φ
_{11}, abovementioned the 1st lens combination the image planes side power of a lens of joint lens be φ
_{12}, abovementioned the 1st lens combination the abbe number of object side lens of joint lens be υ
_{D11}, abovementioned the 1st lens combination the abbe number of image planes side lens of joint lens be υ
_{D12}The time, abovementioned the 1st lens combination satisfies the conditional of following formula 6.Formula 6; 75＜
ν
_{d11}ν
_{d12}(φ
_{11}+φ
_{12})/(φ
_{11}ν
_{d12}+φ
_{12}ν
_{d11})＜
50


8. as each the described lens of variable focal length in the claim 1～
 7, it is characterized in that;
To be made as dP respectively than corresponding anomalous dispersion constant with the partial dispersion of the g line (435nm) of lens, F line (486nm), d line (587nm), C line (656nm), A '"'"' line (768nm) _{G, F}, dP _{G, d}, dP _{C, A '"'"'}, the anomalous dispersion constant of the 2nd lens will counting from the object side of abovementioned the 1st lens combination is made as dP _{G, F12}, dP _{G, d12}, dP _{C, A '"'"' 12}The time, satisfy the conditional of following formula 7～
formula 9.Formula 7; 0.014＜
dP _{g，F12}＜
0.039Formula 8; 0.020＜
dP _{g，d12}＜
0.057Formula 9; 0.031＜
dP _{C，A’12}＜
0.02
 7, it is characterized in that;

9. as each the described lens of variable focal length in the claim 1～
 7, it is characterized in that;
To be made as dP respectively than corresponding anomalous dispersion constant with the partial dispersion of the g line (435nm) of lens, F line (486nm), d line (587nm), C line (656nm), A '"'"' line (768nm) _{G, F}, dP _{G, d}, dP _{C, A '"'"'}, the anomalous dispersion constant of the 1st lens will counting from the object side of abovementioned the 1st lens combination is made as dP _{G, F11}, dP _{G, d11}, dP _{C, A '"'"' 11}, the 2nd lens counting from the object side of abovementioned the 1st lens combination the anomalous dispersion constant be made as dP _{G, F12}, dP _{G, d12}, dP _{C, A '"'"' 12}The time, satisfy the conditional of following formula 10～
formula 12.Formula 10; 0.006＜
dP _{g，F11}dP _{g，F12}＜
0.019Formula 11; 0.002＜
dP _{g，d11}dP _{g，d12}＜
0.035Formula 12; 0.027＜
dP _{C，A’11}dP _{C，A’12}＜
0.016
 7, it is characterized in that;

10. as each the described lens of variable focal length in the claim 1～
 7, it is characterized in that;
When the refractive index of the lens of close object side abovementioned the 2nd lens combination is made as n _{D21}, abbe number is made as υ
_{D21}The time, satisfy the conditional of following formula 13, formula 14.Formula 13; n _{d21}＞
1.85Formula 14; 30＜
ν
_{d21}＜
50
 7, it is characterized in that;

11. as each described lens of variable focal length of claim 1～
 7, it is characterized in that;
When the refractive index of the lens of close object side of abovementioned the 2nd lens combination is made as n _{D21}, abbe number is made as υ
_{D21}The time, satisfy following formula 15, formula 16 conditionals.Formula 15; 1.75＜
n _{d21}＜
1.85Formula 16; 30＜
ν
_{d21}＜
50
 7, it is characterized in that;

12. as each the described lens of variable focal length in the claim 1～
 7, it is characterized in that;
At least comprise an aspheric surface in abovementioned the 2nd lens combination.
 7, it is characterized in that;

13. as each the described lens of variable focal length in the claim 1～
 7, it is characterized in that;
At least comprise an aspheric surface in abovementioned the 3rd lens combination.
 7, it is characterized in that;

14. as each the described lens of variable focal length in the claim 1～
 7, it is characterized in that;
At least comprise an aspheric surface in abovementioned the 5th lens combination.
 7, it is characterized in that;

15. as each the described lens of variable focal length in the claim 1～
 7, it is characterized in that;
In the joint lens of abovementioned the 2nd lens combination, establishing the object side power of a lens is φ
_{22}, abbe number is υ
_{D22}, image planes side power of a lens is φ
_{23}, abbe number is υ
_{D23}The time, satisfy the conditional of following formula 17.Formula 17; 19＜
ν
_{d22}ν
_{d23}(φ
_{22}+φ
_{23})/(φ
_{22}ν
_{d23}+φ
_{23}ν
_{d22})＜
22
 7, it is characterized in that;

16. as each the described lens of variable focal length in the claim 1～
 7, it is characterized in that;
If the systemwide focal length of abovementioned wideangle side is f _{W}, the i lens combination focal length be f _{1}The synthetic focal length of (i=1～
5), the 3rd lens combination and the 4th lens combination is f _{34}The time, satisfy the conditional of following formula 18～
formula 21.Formula 18; 8.5＜
f _{1}/f _{W}＜
10.0Formula 19; 1.6＜
f _{2}/f _{W}＜
1.7Formula 20; 8.0＜
f _{34}/f _{W}＜
9.5Formula 21; 2.0＜
f _{5}/f _{W}＜
5.0
 7, it is characterized in that;

17. , a kind of video camera is the video camera with zoom lens, it is characterized in that:
Abovementioned lens of variable focal length adopts each the described lens of variable focal length in the claim 1～
16.
Specification(s)