CN108693627A - A kind of line that small high-res focal length is short sweeps camera lens - Google Patents
A kind of line that small high-res focal length is short sweeps camera lens Download PDFInfo
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- CN108693627A CN108693627A CN201710219023.5A CN201710219023A CN108693627A CN 108693627 A CN108693627 A CN 108693627A CN 201710219023 A CN201710219023 A CN 201710219023A CN 108693627 A CN108693627 A CN 108693627A
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- Prior art keywords
- lens
- lens group
- focal length
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- group
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/005—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having spherical lenses only
Abstract
The invention discloses a kind of lines that small high-res focal length is short to sweep camera lens, including the first lens group, the second lens group and the third lens group, first lens group is located at the left side of the second lens group, second lens group is located at the left side of the third lens group, and diaphragm is provided between second lens group and the third lens group;First lens group includes the first lens group and the second lens, and second lens group includes the third lens and the 4th lens group, and the 4th lens group includes the 4th lens and the 5th lens, and the third lens group includes the 6th lens and the 7th lens.The present invention moves to achieve the purpose that focusing is burnt along optical axis direction together with diaphragm by the first lens group of adjusting, the second lens group, the third lens group, realizes that operating distance can be with blur-free imaging in 200mm-1000mm.
Description
Technical field
The present invention relates to a kind of lines to sweep camera lens, and the short line of specifically a kind of small high-res focal length sweeps camera lens.
Background technology
Print inspection, check scanning, Electronic products manufacturing, food are had been widely used in the scanning of field of industry detection line
The fields such as sorting, transportation safety.For line scanning imagery camera lens selection in addition to the requirement depending on performance and cost, also one
A important parameter is exactly equipment volume, and the volume of equipment is mainly determined by the optical parameter focal length of camera lens, the longer work of focal length
Distance is bigger, and the shorter operating distance of focal length is smaller, and developing the short line of a small high-res focal length as background scans
Camera lens is to reduce the volume of equipment as the main purpose.
Invention content
The purpose of the present invention is to provide a kind of lines that small high-res focal length is short to sweep camera lens, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the present invention provides the following technical solutions:
A kind of line that small high-res focal length is short sweeps camera lens, including the first lens group, the second lens group and the third lens group,
First lens group is located at the left side of the second lens group, and second lens group is located at the left side of the third lens group, and described
It is provided with diaphragm between two lens groups and the third lens group;First lens group includes the first lens group and the second lens, institute
It includes the third lens and the 4th lens group to state the second lens group, and the 4th lens group includes the 4th lens and the 5th lens, institute
It includes the 6th lens and the 7th lens to state the third lens group;First lens group, the second lens group and the third lens group focal length
It satisfies the following conditional expression:
2 ﹤ ∣ fl/f2∣ ﹤ 5(Formula 1);
0.5 ﹤ ∣ f3/f1∣ ﹤ 1.5(Formula 2);
0.1 ﹤ ∣ f0/f1∣ ﹤ 0.5(Formula 3);
Wherein f1Represent the focal length of the first lens group, f2Represent the focal length of the second lens group, f3Represent the third lens group, f0It represents
The focal length of entire camera lens.
As a further solution of the present invention:The focal length f of the entire camera lens0It satisfies the following conditional expression:
1 ﹤ 2Ymax/f0﹤ 2(Formula 4);
Wherein 2YmaxIt is high to represent maximum real image.
As a further solution of the present invention:The diaphragm is fixed along optical axis direction.
As a further solution of the present invention:First lens group and the third lens group have negative refractive power, described
Second lens group has positive refractive power.
As a further solution of the present invention:First lens, the 5th lens, the 7th lens are with negative refraction energy
The lens of power.
As a further solution of the present invention:Second lens, the third lens, the 4th lens, the 6th lens are tool
There are the lens of positive refractive power.
As further scheme of the invention:First lens, the second lens, the third lens, the 4th lens, the 5th
Lens, the 6th lens and the 7th lens are composed of spheric glass.
Compared with prior art, the beneficial effects of the invention are as follows:
The present invention by adjust the first lens group, the second lens group, the third lens group together with diaphragm along optical axis direction move come
Achieve the purpose that focusing is burnt, realizes that operating distance can be with blur-free imaging in 200mm-1000mm.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Specific implementation mode
The technical solution of this patent is described in more detail With reference to embodiment.
Referring to Fig. 1, a kind of line that small high-res focal length is short sweeps camera lens, including the first lens group, the second lens
Group and the third lens group, first lens group are located at the left side of the second lens group, and second lens group is located at the third lens
The left side of group, diaphragm 8 is provided between second lens group and the third lens group;First lens group includes the first lens
Group 1 and the second lens 2, second lens group include the third lens 3 and the 4th lens group, and the 4th lens group includes the 4th
Lens 4 and the 5th lens 5, the third lens group include the 6th lens 6 and the 7th lens 7;First lens group, second are thoroughly
Microscope group and the third lens group focal length satisfy the following conditional expression:
2 ﹤ ∣ fl/f2∣ ﹤ 5(Formula 1);
0.5 ﹤ ∣ f3/f1∣ ﹤ 1.5(Formula 2);
0.1 ﹤ ∣ f0/f1∣ ﹤ 0.5(Formula 3);
Wherein f1Represent the focal length of the first lens group, f2Represent the focal length of the second lens group, f3Represent the third lens group, f0It represents
The focal length of entire camera lens.
The focal length f of the entire camera lens0It satisfies the following conditional expression:
1 ﹤ 2Ymax/f0﹤ 2(Formula 4);
Wherein 2YmaxIt is high to represent maximum real image.
The diaphragm 8 is fixed along optical axis direction.
There is negative refractive power, second lens group to have positive refraction energy for first lens group and the third lens group
Power.
First lens 1, the 5th lens 5, the 7th lens 7 are the lens with negative refractive power.
Second lens 2, the third lens 3, the 4th lens 4, the 6th lens 6 are the lens with positive refractive power.
First lens 1, the second lens 2, the third lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6 and the 7th
Lens 7 are composed of spheric glass.
It is as shown in table 1 that the short line of the small high-res focal length sweeps camera lens specific implementation data:
Focal length 20mm, image height 30mm, aperture 4.5, multiplying power scope 0.1-0.02, rear coke variation range 13.1-14.7;
Table 1
It can be seen that according to table 1, the present invention realizes that focal length is 20mm, saturating by adjusting the first lens group, the second lens group and third
Microscope group is moved along optical axis direction together with diaphragm 8 to reach operating distance(200mm-1000mm)It is imaged purpose.
The present invention is moved together with diaphragm along optical axis direction by adjusting the first lens group, the second lens group, the third lens group
It moves to achieve the purpose that focusing is burnt, realizes that operating distance can be with blur-free imaging in 200mm-1000mm.
The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party
Formula, one skilled in the relevant art within the scope of knowledge, can also be under the premise of not departing from this patent objective
Various changes can be made.
Claims (7)
1. a kind of line that small high-res focal length is short sweeps camera lens, which is characterized in that including the first lens group, the second lens group
With the third lens group, first lens group is located at the left side of the second lens group, and second lens group is located at the third lens group
Left side, be provided with diaphragm between second lens group and the third lens group;First lens group includes the first lens group
(1)With the second lens(2), second lens group includes the third lens(3)With the 4th lens group, the 4th lens group includes
4th lens(4)With the 5th lens(5), the third lens group includes the 6th lens(6)With the 7th lens(7);Described first
Lens group, the second lens group and the third lens group focal length satisfy the following conditional expression:
2 ﹤ ∣ fl/f2∣ ﹤ 5(Formula 1);
0.5 ﹤ ∣ f3/f1∣ ﹤ 1.5(Formula 2);
0.1 ﹤ ∣ f0/f1∣ ﹤ 0.5(Formula 3);
Wherein f1Represent the focal length of the first lens group, f2Represent the focal length of the second lens group, f3Represent the third lens group, f0It represents whole
The focal length of a camera lens.
2. the short line of small high-res focal length according to claim 1 sweeps camera lens, which is characterized in that the entire mirror
The focal length f of head0It satisfies the following conditional expression:
1 ﹤ 2Ymax/f0﹤ 2(Formula 4);
Wherein 2YmaxIt is high to represent maximum real image.
3. the short line of small high-res focal length according to claim 1 sweeps camera lens, which is characterized in that the diaphragm
(8)It is fixed along optical axis direction.
4. the short line of small high-res focal length according to claim 1 sweeps camera lens, which is characterized in that described first thoroughly
There is negative refractive power, second lens group to have positive refractive power for microscope group and the third lens group.
5. the short line of small high-res focal length according to claim 1 sweeps camera lens, which is characterized in that described first thoroughly
Mirror(1), the 5th lens(5), the 7th lens(7)It is the lens with negative refractive power.
6. the short line of small high-res focal length according to claim 1 sweeps camera lens, which is characterized in that described second thoroughly
Mirror(2), the third lens(3), the 4th lens(4), the 6th lens(6)It is the lens with positive refractive power.
7. the short line of small high-res focal length according to claim 1 sweeps camera lens, which is characterized in that described first thoroughly
Mirror(1), the second lens(2), the third lens(3), the 4th lens(4), the 5th lens(5), the 6th lens(6)With the 7th lens
(7)It is composed of spheric glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219023.5A CN108693627B (en) | 2017-04-06 | 2017-04-06 | Small-size high-resolution short-focal-length line scanning lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219023.5A CN108693627B (en) | 2017-04-06 | 2017-04-06 | Small-size high-resolution short-focal-length line scanning lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108693627A true CN108693627A (en) | 2018-10-23 |
| CN108693627B CN108693627B (en) | 2020-11-13 |
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ID=63842753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710219023.5A Active CN108693627B (en) | 2017-04-06 | 2017-04-06 | Small-size high-resolution short-focal-length line scanning lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108693627B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001290076A (en) * | 2000-04-05 | 2001-10-19 | Nikon Corp | Variable focal length lens system |
| US20030197948A1 (en) * | 2002-04-19 | 2003-10-23 | Pentax Corporation | Zoom lens system which covers a wide angle range |
| JP3495623B2 (en) * | 1998-12-24 | 2004-02-09 | ペンタックス株式会社 | Zoom lens system |
| CN202583580U (en) * | 2012-04-26 | 2012-12-05 | 杭州志达光电有限公司 | Scanning lens |
| CN103792649A (en) * | 2006-02-13 | 2014-05-14 | 卡西欧计算机株式会社 | Zoom lens and camera with zoom lens |
-
2017
- 2017-04-06 CN CN201710219023.5A patent/CN108693627B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3495623B2 (en) * | 1998-12-24 | 2004-02-09 | ペンタックス株式会社 | Zoom lens system |
| JP2001290076A (en) * | 2000-04-05 | 2001-10-19 | Nikon Corp | Variable focal length lens system |
| US20030197948A1 (en) * | 2002-04-19 | 2003-10-23 | Pentax Corporation | Zoom lens system which covers a wide angle range |
| CN103792649A (en) * | 2006-02-13 | 2014-05-14 | 卡西欧计算机株式会社 | Zoom lens and camera with zoom lens |
| CN202583580U (en) * | 2012-04-26 | 2012-12-05 | 杭州志达光电有限公司 | Scanning lens |
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| Publication number | Publication date |
|---|---|
| CN108693627B (en) | 2020-11-13 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20211119 Address after: 410116 workshop 101, building 1, Jinhai Industrial Park, 177 Jinhai Road, Yuhua District, Changsha City, Hunan Province Patentee after: HUNAN CHIOPT OPTICAL TECHNOLOGY Co.,Ltd. Address before: 511400 2nd floor, No.1 Workshop, Jinshan Industrial Park, pengdizhuang, lirendong village, Nancun Town, Panyu District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU CHIOPT OPTOTECH Co.,Ltd. |
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