CN100595621C - Adjustable optical system - Google Patents
Adjustable optical system Download PDFInfo
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- CN100595621C CN100595621C CN200710008535A CN200710008535A CN100595621C CN 100595621 C CN100595621 C CN 100595621C CN 200710008535 A CN200710008535 A CN 200710008535A CN 200710008535 A CN200710008535 A CN 200710008535A CN 100595621 C CN100595621 C CN 100595621C
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Abstract
The present invention discloses an adjustable optical system, comprising a first lens unit and a second lens unit; the arrangement sequence of the system along an optical axis and from an object sideto an image side is as follows: the first lens unit is provided with at least one lens with the surfaces toward the object side and the image side being aspherical, and the distance between the lens and an imaging surface of the image side is fixed; the second lens unit is provided with at least one lens with the surfaces toward the object side and the image side being aspherical, and the second lens unit can be displaced along the optical axis so as to change the distance between the second optical lens and the imaging surface; therefore the distance between the first lens unit and the imaging surface can be remained when the second lens unit is displaced, and the second lens unit can be driven by a drive source with smaller power and volume, thereby reducing the length and volume required by the entire body of the optical system.
Description
Technical field
System of the present invention is relevant with optical system, is meant a kind of adjustable optical system especially.
Background technology
In the field of photography, photograph, early stage camera lens is all adopted fixed-focus, be called tight shot, but because the field depth of this kind tight shot is less, in the scenery of taking low coverage or long distance, or during at camera lens and by the distance change of shooting between thing, often cause being exceeded the field depth that it can be taken by the thing of making a video recording, and make presented after the shooting image blurring.
Autofocus lens commonly used at present, the mode that can focus automatically and make its field depth bigger, and to have the camera lens of automatic focus function at present, all be to reach the function of automatic focusing with the relative position (distance) that moves between whole camera lens and Charged Coupled Device image sensor (CCD) or complementary metal oxide semiconductor image sensor (CMOS).Yet, autofocus lens needs to drive whole camera lens displacement by a drive source, but the displacement meeting of whole camera lens causes the whole required displacement space that provides longer, and the required length of external volume is increased relatively, and adopt more powerful drive source owing to drive whole camera lens displacement, and powerful drive source volume and weight are also relatively large, and can't satisfy on the market now the consumer demand to miniaturization, high image quality.
Summary of the invention
The purpose of this invention is to provide a kind of adjustable optical system, can significantly reduce whole length and volume, to realize the market demand of miniaturization.
For reaching above-mentioned purpose, solution of the present invention is: a kind of adjustable optical system, include one first lens unit and one second lens unit, it is this first lens unit as side along putting in order of an optical axis from a thing side to, have at least one reaching and be aspheric lens towards surface as side towards the thing side, and the fixed distance between these lens and picture one imaging surface of side; This second lens unit, have at least one towards thing side and be aspheric lens towards surface as side, can change along this optical axis displacement and imaging surface between distance.
Or a kind of adjustable optical system, include one first lens unit, one second lens unit and one the 3rd lens unit, it is this first lens unit as side along putting in order of an optical axis from a thing side to, have and be aspheric lens at least towards the thing side and towards surface, the fixed distance between these lens and picture one imaging surface of side as side; This second lens unit has at least towards the thing side and is aspheric lens towards the surface as side, be can change along this optical axis displacement and imaging surface between distance; The 3rd lens unit has at least and to be aspheric lens, the fixed distance between these lens and this imaging surface towards the thing side and towards the surface as side.
After adopting such scheme, optical system of the present invention when object distance when infinity changes to close shot, drive this second lens unit along this optical axis displacement by the drive source that uses miniwatt, small size, so that focus function is carried out in this adjustable optical system inside automatically, all can obtain image clearly when the far and near shot object, and, automatic focus function carries out because of lying in adjustable optical system inside, and total focal length that can keep whole adjustable optical system is not changing and various aberration obtains to reach the purpose of automatic focusing under the situation of well-corrected.And minimizing optical system whole required length and volume.
Description of drawings
Fig. 1 is that the structure of first preferred embodiment of the present invention is formed synoptic diagram;
Fig. 2 is the spherical aberration change curve of preferred embodiment shown in Figure 1;
Fig. 3 is the astigmatism change curve of preferred embodiment shown in Figure 1;
Fig. 4 forms synoptic diagram for the structure of the present invention's second preferred embodiment;
Fig. 5 is the spherical aberration change curve of preferred embodiment shown in Figure 4;
Fig. 6 is the astigmatism change curve of preferred embodiment shown in Figure 4;
Fig. 7 forms synoptic diagram for the structure of the present invention's the 3rd preferred embodiment;
Fig. 8 is the spherical aberration change curve of preferred embodiment shown in Figure 7;
Fig. 9 is the astigmatism change curve of preferred embodiment shown in Figure 7;
Figure 10 forms synoptic diagram for the structure of the present invention's the 4th preferred embodiment;
Figure 11 is the spherical aberration change curve of preferred embodiment shown in Figure 10;
Figure 12 is the astigmatism change curve of preferred embodiment shown in Figure 10;
Figure 13 forms synoptic diagram for the structure of the present invention's the 5th preferred embodiment;
Figure 14 is the spherical aberration change curve of preferred embodiment shown in Figure 13;
Figure 15 is the astigmatism change curve of preferred embodiment shown in Figure 13;
Figure 16 forms synoptic diagram for the structure of the present invention's the 6th preferred embodiment;
Figure 17 is the spherical aberration change curve of preferred embodiment shown in Figure 6;
Figure 18 is the astigmatism change curve of preferred embodiment shown in Figure 6;
Figure 19 forms synoptic diagram for the structure of the present invention's the 7th preferred embodiment;
Figure 20 is the spherical aberration change curve of preferred embodiment shown in Figure 19;
Figure 21 is the astigmatism change curve of preferred embodiment shown in Figure 19;
Figure 22 forms synoptic diagram for the structure of the present invention's the 8th preferred embodiment;
Figure 23 is the spherical aberration change curve of preferred embodiment shown in Figure 22;
Figure 24 is the astigmatism change curve of preferred embodiment shown in Figure 22.
The primary clustering symbol description
First preferred embodiment
Adjustable optical system A
The first lens unit A1, the first lens A11
The second lens unit A2, the second lens A21
The 3rd lens unit A3 the 3rd lens A31
The 4th lens A32 light hurdle A4
Sheet glass A5 optical axis X
Second preferred embodiment
Adjustable optical system B
The first lens unit B1, the first lens B11
The second lens B12, the second lens unit B2
The 3rd lens B21 the 3rd lens unit B3
The 4th lens B31 light hurdle B4
Sheet glass B5 optical axis X
The 3rd preferred embodiment
Adjustable optical system C
The first lens unit C1, the first lens C11
The second lens C12 the 3rd lens C13
The second lens unit C2 the 4th lens C21
Light hurdle C3 sheet glass C4
Optical axis X
The 4th preferred embodiment
Adjustable optical system D
The first lens unit D1, the first lens D11
The second lens unit D2, the second lens D21
The 3rd lens D22 the 3rd lens unit D3
The 4th lens D31 light hurdle D4
Sheet glass D5 optical axis X
The 5th preferred embodiment
Adjustable optical system E
The first lens unit E1, the first lens E11
The second lens E12, the second lens unit E2
The 3rd lens E21 the 4th lens E22
Light hurdle E3 sheet glass E4
Optical axis X
The 6th preferred embodiment
Adjustable optical system F
The first lens unit F1, the first lens F11
The second lens unit F2, the second lens F21
The 3rd lens unit F3 the 3rd lens F31
Light hurdle F4 sheet glass F5
Optical axis X
The 7th preferred embodiment
Adjustable optical system G
The first lens unit G1, the first lens G11
The second lens G12, the second lens unit G2
The 3rd lens G21 light hurdle G3
Sheet glass G4 optical axis X
The 8th preferred embodiment
Adjustable optical system H
The first lens unit H1, the first lens H11
The second lens unit H2, the second lens H21
The 3rd lens H22 light hurdle H3
Sheet glass H4 optical axis X
Embodiment
For being described in more detail feature of the present invention, lifting preferred embodiment of the present invention now and cooperate graphic being described as follows; Wherein:
See also Fig. 1 to Fig. 3, be this bright adjustable optical system A that first preferred embodiment is provided, it consists predominantly of one first lens unit A1, one second lens unit A2 and one the 3rd lens unit A3; Wherein:
By a thing side (Object side) to one the picture side (Image Side) along an optical axis X put in order for:
This first lens unit A1 includes the first lens A11 of a tool forward refractive power, and these first lens A11 is towards the thing side and be aspheric surface towards the surface as side, and is provided with a smooth hurdle A4 towards the surface of thing side;
This second lens unit A2 includes the second lens A21 of a tool negative sense refractive power, and these second lens A21 is towards the thing side and be aspheric surface towards the surface as side;
The 3rd lens unit A3 include the 3rd lens A31 of a tool forward refractive power and the 4th lens A32 of a tool negative sense refractive power, and the 3rd lens unit A3 integral body is tool forward refractive power; The 3rd lens A31 and the 4th lens A32 are towards the thing side and be aspheric surface towards the surface as side.
When object distance when infinity changes to close shot, by using miniwatt, the drive source of small size drives this second lens unit A2 along this optical axis X displacement, so that focus function is carried out in this adjustable optical system A inside automatically, all can obtain image clearly when the far and near shot object, and carry out because of automatic focus function lies in adjustable optical system inside (promptly only by this second lens unit along the displacement of optical axis with change reach with this first lens unit and the 3rd lens unit between relative distance), and total focal length that can keep whole adjustable optical system A is not changing and various aberration obtains to reach the purpose of automatic focusing under the situation of well-corrected.
Above-mentioned adjustable optical system A satisfies following condition:
0＜|d1/d2|＜0.3
Wherein:
D1 is that the first lens A11 of the first lens unit A1 is towards surface is positioned at the second lens A21 of the more locational and second lens unit A2 of optical axis X and is positioned at the distance of optical axis X between more locational towards the surface of thing side as side.
To be the second lens A21 of the second lens unit A2 the 3rd lens A31 that is positioned at more locational and the 3rd lens unit A3 of optical axis X towards the surface as side towards the surface of thing side be positioned at the distance of optical axis X between more locational to d2.
In present embodiment, when the distance between adjustable optical system A and object when infinity is changed to close shot, the direction of this second lens unit A2 system along optical axis X toward the 3rd lens unit A3 moves, the numerical value that makes d1 becomes big and the numerical value of d2 diminishes.
In addition, also can the one sheet glass A5 with filter action and protective effect be set between as side,, reach better image quality with the image sensor of adaptive different encapsulating structures in the 3rd lens unit A3.
See also Fig. 4 to Fig. 6, be the adjustable optical system B of second preferred embodiment provided by the present invention, it consists predominantly of one first lens unit B1, one second lens unit B2 and one the 3rd lens unit B3; Wherein:
By a thing side (Object side) to one the picture side (Image Side) along an optical axis X put in order for:
This first lens unit B1 include first lens B11 of a tool forward refractive power and the second lens B12 of a tool negative sense refractive power, and this first lens unit B1 integral body is tool forward refractive power; This first lens B11 and these second lens B12 are towards the thing side and be aspheric surface towards the surface as side, and these first lens B11 is provided with a smooth hurdle B4 towards the surface of thing side;
This second lens unit B2 includes the 3rd lens B21 of a tool forward refractive power, and the 3rd lens B21 is towards the thing side and be aspheric surface towards the surface as side;
The 3rd lens unit B3 includes the 4th lens B31 of a tool negative sense refractive power, and the 4th lens B31 is towards the thing side and be aspheric surface towards the surface as side.
When object distance when infinity changes to close shot, by using miniwatt, the drive source of small size drives this second lens unit B2 along this optical axis X displacement, so that focus function is carried out in this adjustable optical system B inside automatically, all can obtain image clearly when the far and near shot object, and carry out because of automatic focus function lies in adjustable optical system inside (promptly only by this second lens unit along the displacement of optical axis with change reach with this first lens unit and the 3rd lens unit between relative distance), and total focal length that can keep whole adjustable optical system B is not changing and various aberration obtains to reach the purpose of automatic focusing under the situation of well-corrected.
Above-mentioned adjustable optical system B satisfies following condition:
0＜|d1/d2|＜5.5
Wherein:
To be the second lens B12 of the first lens unit B1 the 3rd lens B21 that is positioned at the more locational and second lens unit B2 of optical axis X towards the surface as side towards the surface of thing side be positioned at the distance of optical axis X between more locational to d1.
To be the 3rd lens B21 of the second lens unit B2 the 4th lens B31 that is positioned at more locational and the 3rd lens unit B3 of optical axis X towards the surface as side towards the surface of thing side be positioned at the distance of optical axis X between more locational to d2.
In present embodiment, when the distance between adjustable optical system B and object when infinity is changed to close shot, the direction of this second lens unit B2 system along optical axis X toward the first lens unit B1 moves, the numerical value that makes d1 diminishes and the numerical value of d2 becomes big.
In addition, also can the one sheet glass B5 with filter action and protective effect be set between as side,, reach better image quality with the image sensor of adaptive different encapsulating structures in the 3rd lens unit B3.
See also Fig. 7 to Fig. 9, be the adjustable optical system C of the 3rd preferred embodiment provided by the present invention, it consists predominantly of one first lens unit C1 and one second lens unit C2; Wherein:
By a thing side (Object side) to one the picture side (Image Side) along an optical axis X put in order for:
This first lens unit C1 include the first lens C11 of a tool forward refractive power, the second lens C12 of a tool negative sense refractive power and the 3rd lens C13 of a tool forward refractive power, and this first lens unit C1 integral body is tool forward refractive power; These first lens C11, this second lens C12 and the 3rd lens C13 are towards the thing side and be aspheric surface towards the surface as side, and these first lens C11 is provided with a smooth hurdle C3 towards the surface of thing side;
This second lens unit C2 includes the 4th lens C21 of a tool negative sense refractive power, and the 4th lens C21 is towards the thing side and be aspheric surface towards the surface as side.
When object distance when infinity changes to close shot, by using miniwatt, the drive source of small size drives this second lens unit C2 along this optical axis X displacement, so that focus function is carried out in this adjustable optical system C inside automatically, all can obtain image clearly when the far and near shot object, and because of lying in adjustable optical system inside, automatic focus function carries out (promptly only by this second lens unit along the displacement of optical axis to change with this first lens unit and and look like relative distance between side), and total focal length that can keep whole adjustable optical system C is not changing and various aberration obtains to reach the purpose of automatic focusing under the situation of well-corrected.
Above-mentioned adjustable optical system C satisfies following condition:
0＜|d1/d2|＜2.1
Wherein:
D1 is that the 3rd lens C13 of the first lens unit C1 is towards surface is positioned at the 4th lens C21 of the more locational and second lens unit C2 of optical axis X and is positioned at the distance of optical axis X between more locational towards the surface of thing side as side.
D2 is that the 4th lens C21 of the second lens unit C2 is positioned at optical axis X surface (imaging surface) more locational and the picture side and is positioned at the distance of optical axis X between more locational towards the surface as side.
In present embodiment, when the distance between adjustable optical system C and object when infinity is changed to close shot, the direction of this second lens unit C2 system along optical axis X toward the first lens unit C1 moves, the numerical value that makes d1 diminishes and the numerical value of d2 becomes big.
In addition, also can the one sheet glass C4 with filter action and protective effect be set between as side,, reach better image quality with the image sensor of adaptive different encapsulating structures in this second lens unit C2.
See also Figure 10 to Figure 12, be the adjustable optical system D of the 4th preferred embodiment provided by the present invention, it consists predominantly of one first lens unit D1, one second lens unit D2 and one the 3rd lens unit D 3; Wherein:
By a thing side (Object side) to one the picture side (Image Side) along an optical axis X put in order for:
This first lens unit D1 includes the first lens D11 of a tool forward refractive power, and these first lens D11 is towards the thing side and be aspheric surface towards the surface as side, and is provided with a smooth hurdle D4 towards the surface of thing side;
This second lens unit D2 include second lens D21 of a tool negative sense refractive power and the 3rd lens D22 of a tool forward refractive power, and this second lens unit D2 integral body is tool forward refractive power; This second lens D21 and the 3rd lens D22 are towards the thing side and be aspheric surface towards the surface as side;
The 3rd lens unit D3 includes the 4th lens D31 of a tool negative sense refractive power, and the 4th lens D31 is towards the thing side and be aspheric surface towards the surface as side.
When object distance when infinity changes to close shot, by using miniwatt, the drive source of small size drives this second lens unit D2 along this optical axis X displacement, so that focus function is carried out in this adjustable optical system D inside automatically, all can obtain image clearly when the far and near shot object, and carry out because of automatic focus function lies in adjustable optical system inside (promptly only by this second lens unit along the displacement of optical axis with change reach with this first lens unit and the 3rd lens unit between relative distance), and total focal length that can keep whole adjustable optical system D is not changing and various aberration obtains to reach the purpose of automatic focusing under the situation of well-corrected.
Above-mentioned adjustable optical system D satisfies following condition:
0＜|d1/d2|＜65
Wherein:
To be the first lens D11 of the first lens unit D1 second lens D21 that is positioned at the more locational and second lens unit D2 of optical axis X towards the surface as side towards the surface of thing side be positioned at the distance of optical axis X between more locational to d1.
To be the 3rd lens D22 of the second lens unit D2 the 4th lens D31 that is positioned at more locational and the 3rd lens unit D3 of optical axis X towards the surface as side towards the surface of thing side be positioned at the distance of optical axis X between more locational to d2.
In present embodiment, when the distance between adjustable optical system D and object when infinity is changed to close shot, the direction of this second lens unit D2 system along optical axis X toward the 3rd lens unit D3 moves, the numerical value that makes d1 becomes big and the numerical value of d2 diminishes.
In addition, also can the one sheet glass D5 with filter action and protective effect be set between as side,, reach better image quality with the image sensor of adaptive different encapsulating structures in the 3rd lens unit D3.
See also Figure 13 to Figure 15, be the adjustable optical system E of the 5th preferred embodiment provided by the present invention, it consists predominantly of one first lens unit E1 and one second lens unit E2; Wherein:
By a thing side (Object side) to one the picture side (Image Side) along an optical axis X put in order for:
This first lens unit E1 include first lens E11 of a tool forward refractive power and the second lens E12 of a tool negative sense refractive power, and this first lens unit E1 integral body is tool forward refractive power; This first lens E11 and these second lens E12 are towards the thing side and be aspheric surface towards the surface as side; And these first lens E11 is provided with a smooth hurdle E4 towards the surface of thing side;
This second lens unit E2 include the 3rd lens E21 of a tool forward refractive power and the 4th lens E22 of a tool negative sense refractive power, and this second lens unit E2 integral body is tool forward refractive power; The 3rd lens E21 and the 4th lens E22 are towards the thing side and be aspheric surface towards the surface as side.
When object distance when infinity changes to close shot, by using miniwatt, the drive source of small size drives this second lens unit E2 along this optical axis X displacement, so that focus function is carried out in this adjustable optical system E inside automatically, all can obtain image clearly when the far and near shot object, and because of lying in adjustable optical system inside, automatic focus function carries out (promptly only by this second lens unit along the displacement of optical axis to change with this first lens unit and and look like relative distance between side), and total focal length that can keep whole adjustable optical system E is not changing and various aberration obtains to reach the purpose of automatic focusing under the situation of well-corrected.
Above-mentioned adjustable optical system E satisfies following condition:
0＜|d1/d2|＜0.15
Wherein:
To be the second lens E12 of the first lens unit E1 the 3rd lens E21 that is positioned at the more locational and second lens unit E2 of optical axis X towards the surface as side towards the surface of thing side be positioned at the distance of optical axis X between more locational to d1.
D2 is that the 4th lens E22 of the second lens unit E2 is positioned at the more locational and surface of picture side (imaging surface) of optical axis X and is positioned at the distance of optical axis X between more locational towards the surface as side.
In present embodiment, when the distance between adjustable optical system E and object when infinity is changed to close shot, the direction of this second lens unit E2 system along optical axis X toward the first lens unit E1 moves, the numerical value that makes d1 diminishes and the numerical value of d2 becomes big.
In addition, also can the one sheet glass E4 with filter action and protective effect be set between as side,, reach better image quality with the image sensor of adaptive different encapsulating structures in this second lens unit E2.
See also Figure 16 to Figure 18, be the adjustable optical system F of the 6th preferred embodiment provided by the present invention, it consists predominantly of one first lens unit F1, one second lens unit F2, one the 3rd lens unit F3 and a smooth hurdle F4; Wherein:
By a thing side (Object side) to one the picture side (Image Side) along an optical axis X put in order for:
This first lens unit F1 includes the first lens F11 of a tool forward refractive power, and these first lens F11 is towards the thing side and be aspheric surface towards the surface as side;
This light hurdle F4 is to be positioned between this first lens unit F1 and this second lens unit F2;
This second lens unit F2 includes the second lens F21 of a tool negative sense refractive power, and these second lens F21 is towards the thing side and be aspheric surface towards the surface as side;
The 3rd lens unit F3 includes the 3rd lens F31 of a tool negative sense refractive power, and the 3rd lens F31 is towards the thing side and be aspheric surface towards the surface as side.
When object distance when infinity changes to close shot, by using miniwatt, the drive source of small size drives this second lens unit F2 along this optical axis X displacement, so that focus function is carried out in this adjustable optical system F inside automatically, all can obtain image clearly when the far and near shot object, and carry out because of automatic focus function lies in adjustable optical system inside (promptly only by this second lens unit along the displacement of optical axis with change reach with this first lens unit and the 3rd lens unit between relative distance), and total focal length that can keep whole adjustable optical system F is not changing and various aberration obtains to reach the purpose of automatic focusing under the situation of well-corrected.
Above-mentioned adjustable optical system F satisfies following condition:
0＜|d1/d2|＜2.5
Wherein:
To be the first lens F11 of the first lens unit F1 second lens F21 that is positioned at the more locational and second lens unit F2 of optical axis X towards the surface as side towards the surface of thing side be positioned at the distance of optical axis X between more locational to d1.
To be the second lens F21 of the second lens unit F2 the 3rd lens F31 that is positioned at more locational and the 3rd lens unit F3 of optical axis X towards the surface as side towards the surface of thing side be positioned at the distance of optical axis X between more locational to d2.
In present embodiment, when the distance between adjustable optical system F and object when infinity is changed to close shot, the direction of this second lens unit F2 system along optical axis X toward the first lens unit F1 moves, the numerical value that makes d1 diminishes and the numerical value of d2 becomes big.
In addition, also can the one sheet glass F5 with filter action and protective effect be set between as side,, reach better image quality with the image sensor of adaptive different encapsulating structures in the 3rd lens unit F3.
See also Figure 19 to Figure 21, be the adjustable optical system G of the 7th preferred embodiment provided by the present invention, it consists predominantly of one first lens unit G1, one second lens unit G2 and a smooth hurdle G3; Wherein:
By a thing side (Object side) to one the picture side (Image Side) along an optical axis X put in order for:
This first lens unit G1 include first lens G11 of a tool forward refractive power and the second lens G12 of a tool negative sense refractive power, and this first lens unit G1 integral body is tool forward refractive power; This first lens G11 and these second lens G12 are towards the thing side and be aspheric surface towards the surface as side;
This light hurdle G3 is to be positioned between this first lens unit G1 and this second lens unit G2;
This second lens unit G2 includes the 3rd lens G21 of a tool forward refractive power, and the 3rd lens G21 is towards the thing side and be aspheric surface towards the surface as side.
When object distance when infinity changes to close shot, by using miniwatt, the drive source of small size drives this second lens unit G2 along this optical axis X displacement, so that focus function is carried out in this adjustable optical system G inside automatically, all can obtain image clearly when the far and near shot object, and carry out because of automatic focus function lies in adjustable optical system inside (promptly only by this second lens unit along the displacement of optical axis with change reach with this first lens unit and this as the relative distance between side), and total focal length that can keep whole adjustable optical system G is not changing and various aberration obtains to reach the purpose of automatic focusing under the situation of well-corrected.
Above-mentioned adjustable optical system G satisfies following condition:
0＜|d1/d2|＜0.1
Wherein:
To be the second lens G12 of the first lens unit G1 the 3rd lens G21 that is positioned at the more locational and second lens unit G2 of optical axis X towards the surface as side towards the surface of thing side be positioned at the distance of optical axis X between more locational to d1.
D2 is that the 3rd lens G21 of the second lens unit G2 is positioned on the optical axis X position a bit towards the surface as side and the surface (imaging surface) of the picture side distance between being positioned on the optical axis X position a bit.
In present embodiment, when the distance between adjustable optical system G and object when infinity is changed to close shot, this second lens unit G2 system moves toward the direction as side along optical axis X, the numerical value that makes d1 becomes big and the numerical value of d2 diminishes.
In addition, also can the one sheet glass G4 with filter action and protective effect be set between as side,, reach better image quality with the image sensor of adaptive different encapsulating structures in this second lens unit G2.
See also Figure 22 to Figure 24, be the adjustable optical system H of the 8th preferred embodiment provided by the present invention, it consists predominantly of one first lens unit H1, one second lens unit H2 and a smooth hurdle H3; Wherein:
By a thing side (Object side) to one the picture side (Image Side) along an optical axis X put in order for:
This first lens unit H1 includes the first lens H11 of a tool forward refractive power, and these first lens H21 is towards the thing side and be aspheric surface towards the surface as side;
This light hurdle H3 is to be positioned between this first lens unit H1 and this second lens unit H2;
This second lens unit H2 include second lens H21 of a tool negative sense refractive power and the 3rd lens H22 of a tool forward refractive power, and this second lens unit H2 integral body is tool forward refractive power; This second lens H21 and the 3rd lens H22 are towards the thing side and be aspheric surface towards the surface as side.
When object distance when infinity changes to close shot, by using miniwatt, the drive source of small size drives this second lens unit H2 along this optical axis X displacement, so that focus function is carried out in this adjustable optical system G inside automatically, all can obtain image clearly when the far and near shot object, and carry out because of automatic focus function lies in adjustable optical system inside (promptly only by this second lens unit along the displacement of optical axis with change reach with this first lens unit and this as the relative distance between side), and total focal length that can keep whole adjustable optical system H is not changing and various aberration obtains to reach the purpose of automatic focusing under the situation of well-corrected.
Above-mentioned adjustable optical system H satisfies following condition:
0＜|d1/d2|<4.2
Wherein:
To be the first lens H11 of the first lens unit H1 second lens H21 that is positioned at the more locational and second lens unit H2 of optical axis X towards the surface as side towards the surface of thing side be positioned at the distance of optical axis X between more locational to d1.
D2 is that the 3rd lens H22 of the second lens unit H2 is positioned on the optical axis X position a bit towards the surface as side and the surface (imaging surface) of the picture side distance between being positioned on the optical axis X position a bit.
In present embodiment, when the distance between adjustable optical system H and object when infinity is changed to close shot, the direction of this second lens unit H2 system along optical axis X toward the thing side moves, the numerical value that makes d1 diminishes and the numerical value of d2 becomes big.
In addition, also can the one sheet glass H4 with filter action and protective effect be set between as side,, reach better image quality with the image sensor of adaptive different encapsulating structures in this second lens unit H2.
Claims (31)
1, a kind of adjustable optical system is characterized in that: include one first lens unit and one second lens unit, its from a thing side to as side along an optical axis put in order for:
This first lens unit, have first lens, second lens of a tool negative sense refractive power and the 3rd lens of a tool forward refractive power from this thing side to this tool forward refractive power of arranging along this optical axis as side, and this first lens unit integral body is tool forward refractive power, the fixed distance between lens and picture one imaging surface of side;
This second lens unit has the 4th lens of a tool negative sense refractive power, can change along this optical axis displacement and imaging surface between distance.
2, adjustable optical system as claimed in claim 1 is characterized in that: the lens of this first lens unit are towards the thing side and be aspheric surface towards the surface as side.
3, adjustable optical system as claimed in claim 1 is characterized in that: the lens of this second lens unit are towards the thing side and be aspheric surface towards the surface as side.
4, adjustable optical system as claimed in claim 1 is characterized in that: more include one along this optical axis arrange and be positioned at this second lens unit to this as the sheet glass between side.
5, adjustable optical system as claimed in claim 1, it is characterized in that: wherein be provided with Yi Guanglan, along optical axis and on the first lens thing side surface, between first lens unit and second lens unit and constitute between the different lens of first lens unit.
6, adjustable optical system as claimed in claim 1 is characterized in that: satisfy following condition: 0＜| d1/d2|＜2.1
Wherein:
D1 be the 3rd lens towards the surface as side be positioned on the optical axis position a bit and the 4th lens towards the surface of thing side be positioned on the optical axis position a bit between distance;
D2 be the 4th lens towards the surface as side be positioned on the optical axis position be positioned at a bit and as the imaging surface of side on the optical axis position a bit between distance.
7, a kind of adjustable optical system is characterized in that: include one first lens unit and one second lens unit, its from a thing side to as side along an optical axis put in order for:
This first lens unit has first lens from this thing side to this tool forward refractive power of arranging along this optical axis as side and second lens of a tool negative sense refractive power, and this first lens unit integral body is tool forward refractive power, the fixed distance between lens and picture one imaging surface of side;
This second lens unit has the 3rd lens from this thing side to this tool forward refractive power of arranging along this optical axis as side and the 4th lens of a tool negative sense refractive power, and this second lens unit integral body is tool forward refractive power, can change along this optical axis displacement and imaging surface between distance.
8, adjustable optical system as claimed in claim 7 is characterized in that: wherein be provided with Yi Guanglan, along optical axis and on the first lens thing side surface, between first lens unit and second lens unit.
9, adjustable optical system as claimed in claim 7 is characterized in that: satisfy following condition: 0＜| d1/d2|＜0.15
Wherein:
D1 be second lens towards the surface as side be positioned on the optical axis position a bit and the 3rd lens towards the surface of thing side be positioned on the optical axis position a bit between distance;
D2 be the 4th lens towards the surface as side be positioned on the optical axis position be positioned at a bit and as the imaging surface of side on the optical axis position a bit between distance.
10, a kind of adjustable optical system is characterized in that: include one first lens unit and one second lens unit, its from a thing side to as side along an optical axis put in order for:
This first lens unit has first lens from this thing side to this tool forward refractive power of arranging along this optical axis as side and second lens of a tool negative sense refractive power, and this first lens unit integral body is tool forward refractive power, the fixed distance between lens and picture one imaging surface of side;
This second lens unit has the 3rd lens of a tool forward refractive power, can change along this optical axis displacement and imaging surface between distance.
11, adjustable optical system as claimed in claim 10, it is characterized in that: wherein be provided with Yi Guanglan, along optical axis and on the first lens thing side surface, between first lens unit and second lens unit and constitute between the different lens of first lens unit.
12, adjustable optical system as claimed in claim 10 is characterized in that: satisfy following condition: 0＜| d1/d2|＜0.1
Wherein:
D1 be second lens towards the surface as side be positioned on the optical axis position a bit and the 3rd lens towards the surface of thing side be positioned on the optical axis position a bit between distance;
The distance that d2 is the 3rd lens between the surface as side is positioned on the optical axis position a bit and is positioned at as the imaging surface of side on the optical axis position a bit.
13, a kind of adjustable optical system is characterized in that: include one first lens unit and one second lens unit, its from a thing side to as side along an optical axis put in order for:
This first lens unit has first lens from this thing side to this tool forward refractive power of arranging along this optical axis as side, lens and the fixed distance that looks like between an imaging surface of side;
This second lens unit has second lens from this thing side to this tool negative sense refractive power of arranging along this optical axis as side and the 3rd lens of a tool forward refractive power, and this second lens unit integral body is tool forward refractive power, this second lens unit can change along this optical axis displacement and imaging surface between distance.
14, adjustable optical system as claimed in claim 13 is characterized in that: wherein more comprise Yi Guanglan, along optical axis and on the first lens thing side surface or between first lens and second lens.
15, adjustable optical system as claimed in claim 13 is characterized in that: satisfy following condition: 0＜| d1/d2|＜4.2
Wherein:
D1 be first lens towards the surface as side be positioned on the optical axis position a bit and second lens towards the surface of thing side be positioned on the optical axis position a bit between distance;
The distance that d2 is the 3rd lens between the surface as side is positioned on the optical axis position a bit and is positioned at as the imaging surface of side on the optical axis position a bit.
16, a kind of adjustable optical system is characterized in that: include one first lens unit, one second lens unit and one the 3rd lens unit, its from a thing side to as side along an optical axis put in order for:
This first lens unit has first lens from this thing side to this tool forward refractive power of arranging along this optical axis as side, these lens and the fixed distance that looks like between an imaging surface of side;
This second lens unit has second lens from this thing side to this tool negative sense refractive power of arranging along this optical axis as side, can change along this optical axis displacement and imaging surface between distance;
The 3rd lens unit, have the 3rd lens from this thing side to this tool forward refractive power of arranging along this optical axis as side and the 4th lens of a tool negative sense refractive power, and the 3rd lens unit integral body is tool forward refractive power, the fixed distance between this lens unit and this imaging surface.
17, adjustable optical system as claimed in claim 16 is characterized in that: the lens of this first lens unit are towards the thing side and be aspheric surface towards the surface as side.
18, adjustable optical system as claimed in claim 16 is characterized in that: the lens of this second lens unit are towards the thing side and be aspheric surface towards the surface as side.
19, adjustable optical system as claimed in claim 16 is characterized in that: the lens of the 3rd lens unit are towards the thing side and be aspheric surface towards the surface as side.
20, adjustable optical system as claimed in claim 16 is characterized in that: more include one along this optical axis arrange and be positioned at the 3rd lens unit to this as the sheet glass between side.
21, adjustable optical system as claimed in claim 16 is characterized in that: wherein be provided with Yi Guanglan, along optical axis and on the first lens thing side surface or between first lens and second lens.
22, adjustable optical system as claimed in claim 16 is characterized in that: satisfy following condition: 0＜| d1/d2|＜0.3
Wherein:
D1 be first lens towards the surface as side be positioned on the optical axis position a bit and second lens towards the surface of thing side be positioned on the optical axis position a bit between distance;
D2 be second lens towards the surface as side be positioned on the optical axis position a bit and the 3rd lens towards the surface of thing side be positioned on the optical axis position a bit between distance.
23, a kind of adjustable optical system is characterized in that: include one first lens unit, one second lens unit and one the 3rd lens unit, its from a thing side to as side along an optical axis put in order for:
This first lens unit has first lens from this thing side to this tool forward refractive power of arranging along this optical axis as side and second lens of a tool negative sense refractive power, and this first lens unit integral body is tool forward refractive power, the fixed distance between this lens unit and picture one imaging surface of side;
This second lens unit has the 3rd lens from this thing side to this tool forward refractive power of arranging along this optical axis as side, can change along this optical axis displacement and imaging surface between distance;
The 3rd lens unit has the 4th lens from this thing side to this tool negative sense refractive power of arranging along this optical axis as side, the fixed distance between these lens and this imaging surface.
24, adjustable optical system as claimed in claim 23 is characterized in that: wherein be provided with Yi Guanglan, along optical axis and on the first lens thing side surface or between first lens and second lens.
25, adjustable optical system as claimed in claim 23 is characterized in that: satisfy following condition: 0＜| d1/d2|＜5.5
Wherein:
D1 be second lens towards the surface as side be positioned on the optical axis position a bit and the 3rd lens towards the surface of thing side be positioned on the optical axis position a bit between distance;
D2 be the 3rd lens towards the surface as side be positioned on the optical axis position a bit and the 4th lens towards the surface of thing side be positioned on the optical axis position a bit between distance.
26, a kind of adjustable optical system is characterized in that: include one first lens unit, one second lens unit and one the 3rd lens unit, its from a thing side to as side along an optical axis put in order for:
This first lens unit has first lens from this thing side to this tool forward refractive power of arranging along this optical axis as side, these lens and the fixed distance that looks like between an imaging surface of side;
This second lens unit has second lens from this thing side to this tool negative sense refractive power of arranging along this optical axis as side and the 3rd lens of a tool forward refractive power, and this second lens unit integral body is tool forward refractive power, can change along this optical axis displacement and imaging surface between distance;
The 3rd lens unit has the 4th lens from this thing side to this tool negative sense refractive power of arranging along this optical axis as side, the fixed distance between these lens and this imaging surface.
27, adjustable optical system as claimed in claim 26 is characterized in that: wherein be provided with Yi Guanglan, along optical axis and on the first lens thing side surface or between first lens and second lens.
28, adjustable optical system as claimed in claim 26 is characterized in that: satisfy following condition: 0＜| d1/d2|＜65
Wherein:
D1 be first lens towards the surface as side be positioned on the optical axis position a bit and second lens towards the surface of thing side be positioned on the optical axis position a bit between distance;
D2 be the 3rd lens towards the surface as side be positioned on the optical axis position a bit and the 4th lens towards the surface of thing side be positioned on the optical axis position a bit between distance.
29, a kind of adjustable optical system is characterized in that: include one first lens unit, one second lens unit and one the 3rd lens unit, its from a thing side to as side along an optical axis put in order for:
This first lens unit has first lens from this thing side to this tool forward refractive power of arranging along this optical axis as side, these lens and the fixed distance that looks like between an imaging surface of side;
This second lens unit has second lens from this thing side to this tool negative sense refractive power of arranging along this optical axis as side, can change along this optical axis displacement and imaging surface between distance;
The 3rd lens unit has the 3rd lens from this thing side to this tool negative sense refractive power of arranging along this optical axis as side, the fixed distance between these lens and this imaging surface.
30, adjustable optical system as claimed in claim 29 is characterized in that: wherein more comprise Yi Guanglan, along optical axis and on the first lens thing side surface or between first lens and second lens.
31, adjustable optical system as claimed in claim 29 is characterized in that: satisfy following condition: 0＜| d1/d2|＜2.5
Wherein:
D1 be first lens towards the surface as side be positioned on the optical axis position a bit and second lens towards the surface of thing side be positioned on the optical axis position a bit between distance;
D2 be second lens towards the surface as side be positioned on the optical axis position a bit and the 3rd lens towards the surface of thing side be positioned on the optical axis position a bit between distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710008535A CN100595621C (en) | 2007-02-01 | 2007-02-01 | Adjustable optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710008535A CN100595621C (en) | 2007-02-01 | 2007-02-01 | Adjustable optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101236294A CN101236294A (en) | 2008-08-06 |
| CN100595621C true CN100595621C (en) | 2010-03-24 |
Family
ID=39920032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710008535A Expired - Fee Related CN100595621C (en) | 2007-02-01 | 2007-02-01 | Adjustable optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100595621C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101594000B1 (en) * | 2009-12-02 | 2016-02-26 | 삼성전자주식회사 | Auto focusing method medium for recording the method auto focusing apparatus |
| FR2996925B1 (en) * | 2012-10-17 | 2017-06-16 | Office Nat D Etudes Et De Rech Aerospatiales | METHOD FOR DESIGNING A PASSIVE MONOVOIE IMAGER CAPABLE OF ESTIMATING DEPTH |
| CN108061958A (en) * | 2017-10-23 | 2018-05-22 | 昆山慕藤光精密光学仪器有限公司 | Slip zooming system in zoom camera lens |
| CN115542522A (en) * | 2021-06-30 | 2022-12-30 | 华为技术有限公司 | Zoom lens, camera module and mobile terminal |
| CN117706726A (en) * | 2022-09-08 | 2024-03-15 | Oppo广东移动通信有限公司 | Optical lens, camera device and electronic device |
-
2007
- 2007-02-01 CN CN200710008535A patent/CN100595621C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101236294A (en) | 2008-08-06 |
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