CN104991329B - A kind of high-resolution projection lens for industry 3D scanning systems - Google Patents
A kind of high-resolution projection lens for industry 3D scanning systems Download PDFInfo
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- CN104991329B CN104991329B CN201510262684.7A CN201510262684A CN104991329B CN 104991329 B CN104991329 B CN 104991329B CN 201510262684 A CN201510262684 A CN 201510262684A CN 104991329 B CN104991329 B CN 104991329B
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Abstract
The present invention relates to a kind of high-resolution projection lens for industry 3D scanning systems, mainly it is made up of optical lens group, iris diaphgram component, prism and chip, it is characterised in that：The optical lens group is sequentially provided with balsaming lens, the 7th lens with positive light coke, the 8th lens with positive light coke of the first lens with positive light coke, the second lens with negative power, the 3rd lens with negative power, the 4th lens with negative power, the 5th lens with negative power and the composition of the 6th lens with positive light coke from the object side to the image side, the iris diaphgram component is located between the 4th lens and the 5th lens, and the prism is located between the 8th lens and the chip.The features such as present invention uses eight spherical lenses, simple in construction, easy processing low with manufacturing cost, low distortion, high-resolution, image space telecentricity.
Description
Technical field
The present invention relates to a kind of projection lens, more particularly to a kind of high-resolution projection lens for industry 3D scanning systems
Head.
Background technology
In recent years, with the fast development of IT technologies, 3D scanning techniques have been widely used for medical treatment, space flight and aviation,
The fields such as special effect making, historical relic's protection.Because 3D scanning systems are the knots that several width specific codings are projected using optical grating projection device
Structure light on object under test, according to two cameras formed an angle synchronously adopt respective image by projection lens produces image
Signal, then successive image processing is carried out, generate the threedimensional model of object under test, therefore the quality of image signals of projection lens collection
There is decisive role to the foundation of final mask.
In order to adapt to the growth requirement of 3D scanning systems, projection lens need to ensure that whole optical system has good imaging
Quality, could improve the scanning accuracy of 3D scanners.Existing projection lens typically all uses the lens of nine or more than nine,
So that lens construction is more complicated, or reach using aspheric surface technology the purpose of high imaging quality simple in construction, but due to
Non-spherical lens is processed and detection difficulty is big, and the cost and process complexity of whole camera lens are also increased to a certain extent.
The content of the invention
It is an object of the invention to provide a kind of high-resolution projection lens for industry 3D scanning systems, the projection lens
Header structure is simple, as matter height, and manufacturing cost is low, easy processing.
To achieve the above object, the technical scheme is that：A kind of high-resolution for industry 3D scanning systems is thrown
Shadow camera lens, is mainly made up of, the optical lens group is from object space to picture optical lens group, iris diaphgram component, prism and chip
Side is sequentially provided with the first lens with positive light coke, the second lens with positive light coke, the with negative power the 3rd saturating
Mirror, the 4th lens with negative power, the 5th lens with negative power and the composition of the 6th lens with positive light coke
Balsaming lens, the 7th lens with positive light coke, the 8th lens with positive light coke, the iris diaphgram component is located at
Between 4th lens and the 5th lens, the prism is located between the 8th lens and the chip.
Further, first lens be biconvex lens, second lens be concave surface towards image planes falcate just
Lens, the 3rd lens are negative meniscus of the concave surface towards image planes, and the 4th lens are concave surface towards the curved of image planes
Month shape negative lens, the 5th lens are biconcave lens, and the 6th lens are biconvex lens, and the 7th lens are lenticular
Mirror, the 8th lens are biconvex lens.
Further, the airspace between first lens and the second lens is described between 0.1mm and 1mm
Airspace between second lens and the 3rd lens between 0.5mm and 1.5mm, the 3rd lens and the 4th lens it
Between airspace between 2mm and 4mm, the airspace between the 4th lens and iris diaphgram component is between 7mm
Between 9mm, the airspace between the iris diaphgram component and the 5th lens is between 2mm and 4mm, and the described 6th is saturating
Airspace between mirror and the 7th lens is between 12mm and 14mm, the air between the 7th lens and the 8th lens
Interval is between 4mm and 6mm, and eight airspace between lens and prism is between 6mm and 8mm.
Further, the focal length of first lens is between 35mm and 45mm, the focal lengths of second lens between
Between 25mm and 35mm, the focal length of the 3rd lens between -5mm and -15mm, the focal lengths of the 4th lens between -
Between 25mm and -35mm, the focal length of the balsaming lens between 35mm and 45mm, the focal lengths of the 7th lens between
Between 55mm and 75mm, the focal length of the 8th lens is between 45mm and 55mm.
Further, the refractive index of first lens is between 1.75 and 1.85, the refractive index of second lens
Between 1.75 and 1.85, the refractive index of the 3rd lens is between 1.55 and 1.65, the refraction of the 4th lens
Rate is between 1.75 and 1.85, and the refractive index of the 5th lens is between 1.75 and 1.85, the folding of the 6th lens
Rate is penetrated between 1.45 and 1.55, the refractive index of the 7th lens between 1.45 and 1.55, the 8th lens
Refractive index is between 1.55 and 1.65.
Further, the chip is 0.3 inch of DMD-DLP3010 chip, and resolution ratio is WXGA1280*720.
Further, the effective focal length of the projection lens is 27.5mm, and relative value aperture F/2.2, maximum caliber is small
In 23mm, optics overall length is for the first lens to the 8th lens apart from 58.43mm.
The beneficial effects of the invention are as follows there is provided a kind of high-resolution projection lens suitable for industry 3D scanning systems, it is somebody's turn to do
Projection lens is using eight spherical lenses, with simple in construction, and as matter height, manufacturing cost is low, easy processing, low distortion, high-resolution
The features such as rate, image space telecentricity.
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Brief description of the drawings
Fig. 1 is the optical structure chart of the projection lens of the embodiment of the present invention.
Fig. 2 is that the image height of optical lens half is 0, light of each visual field of 0.5mm, 2.1mm, 3.1mm, 4.4mm on chip in Fig. 1
Line point range figure.
Fig. 3 is the transmission function MTF curve figure on each visual field chip face of optical lens in Fig. 1.
Fig. 4 is the curvature of field and distortion figure of optical lens in Fig. 1.
Fig. 5 is the chromatic longitudiinal aberration figure of optical lens in Fig. 1.
Fig. 6 is the axial chromatic aberration figure of optical lens in Fig. 1.
Embodiment
The present invention is used for the high-resolution projection lens of industry 3D scanning systems, as shown in figure 1, main by optical lens
Group, iris diaphgram component 10, prism 9 and chip 11 are constituted, and optical lens group is sequentially provided with positive light focus from the object side to the image side
Degree the first lens 1, the second lens 2 with positive light coke, the 3rd lens 3 with negative power, with negative power
4th lens 4, the 5th lens 5 with negative power and the 6th lens 6 with positive light coke composition balsaming lens, have
The 7th lens 7, the 8th lens 8 with positive light coke of positive light coke, iris diaphgram component 10 are located at the 4th lens 4 and the 5th
Between lens 5, prism 9 is located between the 8th lens 8 and chip 11.
Wherein, the first lens 1 are biconvex lens, and the second lens 2 are falcate positive lens of the concave surface towards image planes, and the 3rd is saturating
Mirror 3 is negative meniscus of the concave surface towards image planes, and the 4th lens 4 are negative meniscus of the concave surface towards image planes, and the 5th is saturating
Mirror 5 is biconcave lens, and the 6th lens 6 are biconvex lens, and the 7th lens 7 are biconvex lens, and the 8th lens 8 are biconvex lens.
Airspace between first lens 1 and the second lens 2 is between 0.1mm and 1mm, the second lens 2 and the 3rd
Airspace between lens 3 is between 0.5mm and 1.5mm, and the airspace between the 3rd lens 3 and the 4th lens 4 is situated between
Between 2mm and 4mm, the airspace between the 4th lens 4 and iris diaphgram component 10, can darkening between 7mm and 9mm
Airspace between the late lens 5 of component 10 and the 5th is between 2mm and 4mm, between the 6th lens 6 and the 7th lens 7
Airspace between 12mm and 14mm, airspace between the 7th lens 7 and the 8th lens 8 between 4mm and 6mm it
Between, the airspace between the 8th lens 8 and prism 9 is between 6mm and 8mm.In the present embodiment, the first lens 1 and
Airspace between two lens 2 is 0.1mm, and the airspace between the second lens 2 and the 3rd lens 3 is 0.927mm, the 3rd
Airspace between the lens 4 of lens 3 and the 4th is 2.191mm, the 4th lens 4 and the airspace between the 5th lens 5
For 11.701mm, the airspace between the 6th lens 6 and the 7th lens 7 is 13.058mm, the 7th lens 7 and the 8th lens 8
Between airspace be 5.873mm, airspace between the 8th lens 8 and prism 9 is 7.423mm.
The focal length of first lens 1 between 35mm and 45mm, the focal length of the second lens 2 between 25mm and 35mm,
The focal length of 3rd lens 3 is between -5mm and -15mm, and the focal length of the 4th lens 4 is glued saturating between -25mm and -35mm
The focal length of mirror is between 35mm and 45mm, and the focal length of the 7th lens 7 is between 55mm and 75mm, the focal length of the 8th lens 8
Between 45mm and 55mm.
The refractive index of first lens 1 between 1.75 and 1.85, the refractive indexes of the second lens 2 between 1.75 and 1.85 it
Between, the refractive index of the 3rd lens 3 is between 1.55 and 1.65, and the refractive index of the 4th lens 4 is between 1.75 and 1.85, and
The refractive index of five lens 5 is between 1.75 and 1.85, and the refractive index of the 6th lens 6 is between 1.45 and 1.55, and the 7th is saturating
The refractive index of mirror 7 is between 1.45 and 1.55, and the refractive index of the 8th lens 8 is between 1.55 and 1.65.
The materials'use flint glass of first lens 1, the second lens 2 use flint glass, and the 3rd lens 3 use flint glass
Glass, the 4th lens 4 use flint glass, and the 5th lens 5 use flint glass, and the 6th lens 6 use crown glass, the 7th lens
7 use crown glass, and the 8th lens 8 use crown glass.
Chip is 0.3 inch of DMD-DLP3010 chip, and resolution ratio is WXGA1280*720.
The effective focal length of projection lens is 27.5mm, and relative value aperture F/2.2, maximum caliber is less than 23mm, and optics is total
A length of first lens are to the 8th lens apart from 58.43mm.
The wavelength of the present embodiment is WAVE, and F-number is FNO, and effective focal length is EFL, the distance in the first face to dmd chip
For TTL.WAVE=465nm-540nm-640nm, FNO=2.2, EFL=27.5mm, TTL=82.73mm, table 1 are the structure ginsengs of camera lens
Number table, unit mm.
Table 1
Fig. 2 is that the image height of optical lens half is that 0, each visual field of 0.5mm, 2.1mm, 3.1mm, 4.4mm exists in the embodiment of the present invention
Light point range figure on chip.It is seen that the root mean square radii of the point range figure under each visual field is less than display chip picture
Plain size 5.4um.
Fig. 3 is the transmission function MTF curve figure on each visual field chip face of optical lens in the embodiment of the present invention.In figure
The mtf value of each visual field is all higher than 0.3 under 200lp/mm, and curve smoothing, compact, illustrates that the lens imaging is clear, uniformly, can
Match with 0.3 inch of DMD-DLP3010.
Fig. 4 is the curvature of field and distortion figure of optical lens in the embodiment of the present invention.As can be seen from the figure the shot field curvature is small
In 0.1mm, distortion is less than 0.3%.
Fig. 5 is the chromatic longitudiinal aberration figure of optical lens in the embodiment of the present invention.As can be seen from the figure maximum lateral chromatic aberration
Less than 3um.
Fig. 6 is the axial chromatic aberration figure of optical lens in the embodiment of the present invention.As seen from Figure 6 in wavelength 465nm-640nm
In the range of, maximum focus deviation is 42.5um.
Above is presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, produced function is made
During with scope without departing from technical solution of the present invention, protection scope of the present invention is belonged to.
Claims (3)
1. a kind of high-resolution projection lens for industry 3D scanning systems, by optical lens group, iris diaphgram component, prism
With chip composition, it is characterised in that：It is saturating that the optical lens group is sequentially provided with first with positive light coke from the object side to the image side
Mirror, the second lens with positive light coke, the 3rd lens with negative power, the 4th lens with negative power, have
It is the balsaming lens of 5th lens of negative power and the 6th lens composition with positive light coke, the with positive light coke the 7th saturating
Mirror, the 8th lens with positive light coke, the iris diaphgram component are located between the 4th lens and the 5th lens,
The prism is located between the 8th lens and the chip；
First lens are biconvex lens, and second lens are falcate positive lens of the concave surface towards image planes, the described 3rd
Lens are negative meniscus of the concave surface towards image planes, and the 4th lens are negative meniscus of the concave surface towards image planes, institute
The 5th lens are stated for biconcave lens, the 6th lens are biconvex lens, the 7th lens are biconvex lens, and the described 8th is saturating
Mirror is biconvex lens；
Airspace between first lens and the second lens is between 0.1mm and 1mm, second lens and the 3rd
Airspace between lens is between 0.5mm and 1.5mm, and the airspace between the 3rd lens and the 4th lens is situated between
Between 2mm and 4mm, the airspace between the 4th lens and iris diaphgram component is described between 7mm and 9mm
Airspace between iris diaphgram component and the 5th lens between 2mm and 4mm, the 6th lens and the 7th lens it
Between airspace between 12mm and 14mm, airspace between the 7th lens and the 8th lens between 4mm and
Between 6mm, the airspace between the 8th lens and prism is between 6mm and 8mm；
The focal length of first lens between 35mm and 45mm, the focal lengths of second lens between 25mm and 35mm it
Between, the focal length of the 3rd lens between -5mm and -15mm, the focal lengths of the 4th lens between -25mm and -35mm it
Between, the focal length of the balsaming lens between 35mm and 45mm, the focal length of the 7th lens between 55mm and 75mm,
The focal length of 8th lens is between 45mm and 55mm；
The refractive index of first lens is between 1.75 and 1.85, and the refractive index of second lens is between 1.75 and 1.85
Between, the refractive index of the 3rd lens is between 1.55 and 1.65, and the refractive index of the 4th lens is between 1.75 Hes
Between 1.85, the refractive index of the 5th lens is between 1.75 and 1.85, and the refractive index of the 6th lens is between 1.45
And between 1.55, the refractive index of the 7th lens between 1.45 and 1.55, the refractive indexes of the 8th lens between
Between 1.55 and 1.65.
2. a kind of high-resolution projection lens for industry 3D scanning systems according to claim 1, it is characterised in that：
The chip is 0.3 inch of DMD-DLP3010 chip, and resolution ratio is WXGA1280*720.
3. a kind of high-resolution projection lens for industry 3D scanning systems according to claim 1, it is characterised in that：
The effective focal length of the projection lens is 27.5mm, and relative value aperture F is 2.2, and maximum caliber is less than 23mm, the first lens
Thing is sideways 58.43mm to the distance of the image side surface of the 8th lens.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510262684.7A CN104991329B (en) | 2015-05-22 | 2015-05-22 | A kind of high-resolution projection lens for industry 3D scanning systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510262684.7A CN104991329B (en) | 2015-05-22 | 2015-05-22 | A kind of high-resolution projection lens for industry 3D scanning systems |
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| Publication Number | Publication Date |
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| CN104991329A CN104991329A (en) | 2015-10-21 |
| CN104991329B true CN104991329B (en) | 2017-08-25 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105403982B (en) * | 2015-12-28 | 2017-12-22 | 中山联合光电科技股份有限公司 | It is a kind of high as matter is used for unmanned plane optical imaging lens |
| CN106597640A (en) * | 2016-12-28 | 2017-04-26 | 东莞市云泰光学有限公司 | Distortion-free wide-angle camera lens |
| CN110873943B (en) * | 2018-08-31 | 2022-04-12 | 佳凌科技股份有限公司 | Optical imaging lens |
| CN109839717B (en) * | 2018-12-27 | 2020-10-23 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
| JP6843486B2 (en) | 2018-12-27 | 2021-03-17 | エーエーシー オプティックス ソリューションズ ピーティーイー リミテッド | Imaging optical lens |
| CN109828357B (en) * | 2018-12-27 | 2020-10-23 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
| CN110058387B (en) * | 2019-04-01 | 2021-04-23 | 广景视睿科技（深圳）有限公司 | Double-telecentric projection lens and projection system |
| CN110260821B (en) * | 2019-05-28 | 2021-11-23 | 深圳市菲森科技有限公司 | Optical module based on fringe projection and three-dimensional analysis system |
| CN110068916B (en) * | 2019-06-06 | 2021-10-08 | 南京华群光电技术有限公司 | Three hundred sixty degree inner hole annular view field optical system |
| WO2021128389A1 (en) * | 2019-12-28 | 2021-07-01 | 诚瑞光学(常州)股份有限公司 | Camera optical lens |
| CN115248495B (en) * | 2022-09-22 | 2023-01-03 | 浙江智慧视频安防创新中心有限公司 | Projection lens |
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| KR101452045B1 (en) * | 2012-10-25 | 2014-10-21 | 삼성전기주식회사 | Optical System |
| CN204009193U (en) * | 2014-06-05 | 2014-12-10 | 厦门奇亚光电科技有限公司 | A kind of high bat camera lens |
| CN104238075B (en) * | 2014-08-19 | 2018-06-08 | 利达光电股份有限公司 | A kind of big visual field in large aperture day and night confocal high-resolution monitoring camera |
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Address after: 350108, Fujian Fuzhou high tech Zone Haixi new and high tech Industrial Park Innovation Park, No. 15, building 3-8 Applicant after: Fujian Hao Lan Photoelectric Co., Ltd. Address before: Cangshan District of Fuzhou City, Fujian province 350008 Jinshan Road No. 618 orangery Chau Industrial Park 13 3 floor Applicant before: Fujian Hao Lan Photoelectric Co., Ltd. |
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