CN106644074B - A kind of 3 D stereo spectrum imaging system - Google Patents
A kind of 3 D stereo spectrum imaging system Download PDFInfo
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- CN106644074B CN106644074B CN201611008548.6A CN201611008548A CN106644074B CN 106644074 B CN106644074 B CN 106644074B CN 201611008548 A CN201611008548 A CN 201611008548A CN 106644074 B CN106644074 B CN 106644074B
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- 238000003384 imaging method Methods 0.000 title claims abstract description 27
- 238000001228 spectrum Methods 0.000 title claims abstract description 20
- 208000004350 Strabismus Diseases 0.000 claims abstract description 24
- 230000003595 spectral effect Effects 0.000 claims abstract description 12
- 239000006185 dispersion Substances 0.000 claims abstract description 10
- 238000012937 correction Methods 0.000 claims abstract description 5
- 230000004313 glare Effects 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims description 4
- 210000001747 pupil Anatomy 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000004075 alteration Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000701 chemical imaging Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 102100027340 Slit homolog 2 protein Human genes 0.000 description 1
- 101710133576 Slit homolog 2 protein Proteins 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2823—Imaging spectrometer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0262—Constructional arrangements for removing stray light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
- G01J2003/425—Reflectance
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of 3 D stereo spectrum imaging systems, the system comprises preset lens, slit and spectrometers, the preset lens include facing preset lens, the first strabismus preset lens and the second strabismus preset lens, and three preset lens share a spectrometer and detector, the first strabismus preset lens and the second strabismus preset lens and described face preset lens there are 27 ° of angles；Distant object is imaged on the slit of an image planes by the preset lens, and three parallel slits are formed on slit plate；After the light beam that target image issues enters spectrometer by three slits, three-beam carries out first time dispersion by first curved surface prism, then second curved surface prism is again incident on after three reflecting mirrors reflect, carry out second of dispersion, after the off-axis corrective lens (eye protection) correction, finally by detector array received.Above system can obtain the three-dimensional spatial information and spectral information of detection target simultaneously, and the complexity and development cost of system entirety is effectively reduced.
Description
Technical field
The present invention relates to spectral imaging technology field more particularly to a kind of 3 D stereo spectrum imaging systems.
Background technique
Three-dimensional imaging is the effective ways for obtaining target three-D profile information, passes through airborne or spaceborne space multistory camera
It pushes away and sweeps completion, in remote sensing platform flight course, CCD (Charge Coupled Device) stereoscopic camera in space obtains ground
Information of the target under different perspectives, using same track different perspectives remote sensing image or adjacent orbit remote sensing image to comprising
Depth parallax information realizes three-dimensional imaging through computer Digital Image Processing and three-dimensional imaging operation, but the technology only has space
Information is unable to complete the analysis to physical and chemical information without spectral information, and spectral imaging technology is a kind of by imaging technique and spectrum
The novel multi-vitamin technology for information acquisition that technology combines, it can obtain detected target two-dimensional space information and one-dimensional spectrum
Information forms data cube.
In order to obtain the three-dimensional spatial information and spectral information of target simultaneously, gradually appears utilize laser radar in recent years
The method that data are merged is obtained with hyperspectral imager, but due to imaging mechanism, data acquisition continuity (laser thunder
Up to) difference, along with the feature of airborne platform flight stability deficiency, increase different platform obtain data registration it is difficult
Degree, so that therefore multidimensional data fusion treatment precision and information extraction efficiency receive biggish restriction.Therefore there is an urgent need to from
Data acquisition sources head is started with, and a kind of scheme by three-dimensional imaging and the data integrated acquisition of high light spectrum image-forming is sought.
Summary of the invention
The object of the present invention is to provide a kind of 3 D stereo spectrum imaging system, which can obtain detection target simultaneously
Three-dimensional spatial information and spectral information, thus realize multidimensional information integration obtain.
A kind of 3 D stereo spectrum imaging system, the system comprises preset lens, slit and spectrometers, in which:
The preset lens are including facing preset lens, the first strabismus preset lens and the second strabismus preset lens, and three preset lens
Share a spectrometer and detector, in which:
It the first strabismus preset lens and the second strabismus preset lens and described face preset lens there are 27 ° of angles；
The preset lens of facing generate front view for being vertically imaged over the ground；
The first strabismus preset lens generate front view for the imaging that turns forward；
The second strabismus preset lens generate rearview for tilting backwards imaging；
Distant object is imaged on the slit of an image planes by the preset lens, formed on slit plate three it is parallel narrow
Seam；
The spectrometer includes two curved surface prisms, three reflecting mirrors and off-axis corrective lens (eye protection), in which:
After the light beam that target image issues enters the spectrometer by three slits, three-beam passes through first curved surface prism
First time dispersion is carried out, then second curved surface prism is again incident on after three reflecting mirrors reflect, carries out second of color
It dissipates, after the off-axis corrective lens (eye protection) correction, finally by detector array received；
The row pixel of the detector array receives the spatial information of the target image, and column pixel receives the target figure
Three groups of spectral informations of picture.
The system also includes two pieces of plane mirrors, and the optical path for squinting two pieces preset lens is turned back, and make each
Visual field chief ray is incident perpendicular to the slit.
High reflection film layer, and the plane reflection are coated in the light specific region of the correspondence slit of the plane mirror
Delustring processing is done at the other positions of mirror and the back side.
Veiling glare diaphragm is additionally provided at the slit, for carrying out the veiling glare processing that disappears.
The preset lens are telecentric beam path, for realizing the pupil matching of preset lens and spectrometer.
The picture of three slits, which is tieed up on the detector array along spectrum, to be unfolded, and the spectral information not phase mutual respect that dispersion is opened
It is folded.
As seen from the above technical solution provided by the invention, above system can obtain the three-dimensional of detection target simultaneously
Spatial information and spectral information, and the complexity and development cost of system entirety is effectively reduced, suitable for airborne or spaceborne set
It is standby, especially meet the application demand of load miniaturization.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 provides the structural schematic diagram of 3 D stereo spectrum imaging system by the embodiment of the present invention；
Fig. 2 is preset lens structural schematic diagram provided by the embodiment of the present invention；
Fig. 3 is three slit schematic diagrames of formation described in the embodiment of the present invention.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, belongs to protection scope of the present invention.
The embodiment of the present invention is described in further detail below in conjunction with attached drawing, is implemented as shown in Figure 1 for the present invention
The structural schematic diagram of the provided 3 D stereo spectrum imaging system of example, the system comprises preset lens 1, slit 2 and spectrometer 3,
Wherein:
The preset lens 1 are including facing preset lens, the first strabismus preset lens and the second strabismus preset lens, and three preset lens
Share a spectrometer and detector, in which:
Be illustrated in figure 2 preset lens structural schematic diagram provided by the embodiment of the present invention, the first strabismus preset lens and
There are 27 ° of angles in the second strabismus preset lens and the preset lens of facing, i.e., its each visual field chief ray is with slit angle
27°；
The preset lens of facing generate front view for being vertically imaged over the ground；
The first strabismus preset lens generate front view for the imaging that turns forward；
The second strabismus preset lens generate rearview for tilting backwards imaging；
Distant object is imaged on the slit of an image planes by above-mentioned preset lens 1, formed on slit plate three it is parallel
Slit 201,202 and 203 is illustrated in figure 3 three slit schematic diagrames of formation described in the embodiment of the present invention；
The light beam that target image issues enters the spectrometer by three slits；In the specific implementation, described face preset lens
Corresponding to be imaged onto intermediate slit 202, the corresponding slit 201 being imaged above of the first strabismus preset lens, described second tiltedly
Following slit 203 is imaged onto depending on preset lens correspondence；
The spectrometer includes two curved surface prisms, three reflecting mirrors and off-axis corrective lens (eye protection), with reference to Fig. 1, three reflecting mirrors
Classical Offner system is constituted, two curved surface prisms are located at the two-arm of Offner system, realize the dispersion to light and aberration
Correction；For three reflecting mirrors for turn back optical path and imaging, off-axis corrective lens (eye protection) is remaining with other for further correcting systematical distortion
Aberration；
After the light beam that target image issues enters the spectrometer by three slits, three-beam passes through first curved surface prism
First time dispersion is carried out, then second curved surface prism is again incident on after three reflecting mirrors reflect, carries out second of color
It dissipates, after the off-axis corrective lens (eye protection) correction, finally by detector array received；
The row pixel of the detector array receives the spatial information of the target image, and column pixel receives the target figure
Three groups of spectral informations of picture.The picture of above-mentioned three slits, which is tieed up on the detector array along spectrum, to be unfolded, and the light that dispersion is opened
Spectrum information does not overlap.
In the specific implementation, the system can also include two pieces of plane mirrors, for squinting two blocks the light of preset lens
Road is turned back, and makes each visual field chief ray perpendicular to slit incidence.While in order to avoid facing between optical path and strabismus optical path
Optical path aliasing is coated with high reflection film layer in the light specific region of the correspondence slit of the plane mirror, and the plane is anti-
The other positions and the back side for penetrating mirror do delustring processing.
In addition, veiling glare is caused in order to avoid being directly incident on the light beam at slit in optical path without plane mirror,
Veiling glare diaphragm is additionally provided at the slit, for carrying out the veiling glare processing that disappears.
Since spectrometer is object space telecentric system, therefore the preset lens are telecentric beam path, for realizing preset lens and light
The pupil matching of spectrometer.
Further, it emulates to obtain above-mentioned spectrum imaging system by optical design software and exist respectively to three slit images
The optical transfer function curve of several typical spectral coverages of 450nm, 600nm and 1000nm, from acquired transfer curve: three
Slit all typical spectral coverages MTF numerical value close to diffraction limit, imaging system images quality is good.
It is worth noting that, the embodiment being previously mentioned only is used as the exemplary illustration of technical solution of the present invention, without answering
It is construed to limitation of the present invention, any couple of present invention carries out obvious part change and be regarded as alternative of the invention
Case, this alternative solution include using between different preset lens angle, select different types of spectrometer etc., these changes and
Variation does not depart from essential scope of the invention.
In conclusion system described in the embodiment of the present invention has the advantages that
1) scheme for using three preset lens and a spectrometer, does not need multiple detectors and multiple spectrometers, reduces
Cost and development difficulty；
2) it avoids veiling glare from influencing, is coated with high reflection film layer in the light specific region of the correspondence slit of plane mirror, put down
Delustring processing is done at the other positions of face reflecting mirror and the back side, and veiling glare diaphragm is arranged at slit and carries out the veiling glare processing that disappears.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (4)
1. a kind of 3 D stereo spectrum imaging system, which is characterized in that the system comprises preset lens, slit and spectrometer,
In:
The preset lens include facing preset lens, the first strabismus preset lens and the second strabismus preset lens, and three preset lens share
One spectrometer and detector, in which:
It the first strabismus preset lens and the second strabismus preset lens and described face preset lens there are 27 ° of angles；
The preset lens of facing generate front view for being vertically imaged over the ground；
The first strabismus preset lens generate front view for the imaging that turns forward；
The second strabismus preset lens generate rearview for tilting backwards imaging；
Distant object is imaged on the slit of an image planes by the preset lens, and three parallel slits are formed on slit plate；
The spectrometer includes two curved surface prisms, three reflecting mirrors and off-axis corrective lens (eye protection), in which:
After the light beam that target image issues enters the spectrometer by three slits, three-beam is carried out by first curved surface prism
Then first time dispersion is again incident on second curved surface prism after three reflecting mirrors reflect, carry out second of dispersion, then
After the off-axis corrective lens (eye protection) correction, finally by detector array received；
The row pixel of the detector array receives the spatial information of the target image, and column pixel receives the target image
Three groups of spectral informations；
Further, the system also includes two pieces of plane mirrors, and the optical path for squinting two pieces preset lens is turned back, and make
Each visual field chief ray is incident perpendicular to the slit；
Wherein, it is coated with high reflection film layer in the light specific region of the correspondence slit of the plane mirror, and the plane is anti-
The other positions and the back side for penetrating mirror do delustring processing.
2. 3 D stereo spectrum imaging system according to claim 1, which is characterized in that
Veiling glare diaphragm is additionally provided at the slit, for carrying out the veiling glare processing that disappears.
3. 3 D stereo spectrum imaging system according to claim 1, which is characterized in that
The preset lens are telecentric beam path, for realizing the pupil matching of preset lens and spectrometer.
4. 3 D stereo spectrum imaging system according to claim 1, which is characterized in that
The picture of three slits, which is tieed up on the detector array along spectrum, to be unfolded, and the spectral information that dispersion is opened does not overlap.
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| CN201611008548.6A CN106644074B (en) | 2016-11-16 | 2016-11-16 | A kind of 3 D stereo spectrum imaging system |
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| CN110045498A (en) * | 2019-04-01 | 2019-07-23 | 深圳市速腾聚创科技有限公司 | Light scanning apparatus and laser radar |
| CN110319932A (en) * | 2019-07-09 | 2019-10-11 | 中国科学院光电研究院 | A kind of high light spectrum image-forming optics system |
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| US6122051A (en) * | 1998-06-04 | 2000-09-19 | Raytheon Company | Multi-slit spectrometer |
| CN103471717B (en) * | 2013-09-17 | 2016-01-20 | 中国科学院长春光学精密机械与物理研究所 | Based on the super-resolution spectrograph of many slit array |
| CN103630118B (en) * | 2013-11-22 | 2016-03-09 | 中国科学院光电研究院 | A kind of three-dimensional Hyperspectral imaging devices |
| US10070055B2 (en) * | 2015-03-25 | 2018-09-04 | Massachusetts Institute Of Technology | Devices and methods for optically multiplexed imaging |
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