CN111750997A - Optical imaging detection device based on polarization time-sharing spectrum synchronization - Google Patents
Optical imaging detection device based on polarization time-sharing spectrum synchronization Download PDFInfo
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- CN111750997A CN111750997A CN202010607906.5A CN202010607906A CN111750997A CN 111750997 A CN111750997 A CN 111750997A CN 202010607906 A CN202010607906 A CN 202010607906A CN 111750997 A CN111750997 A CN 111750997A
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- 230000010287 polarization Effects 0.000 title claims abstract description 68
- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000012634 optical imaging Methods 0.000 title claims abstract description 24
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 238000003384 imaging method Methods 0.000 claims abstract description 14
- 238000007781 pre-processing Methods 0.000 claims abstract description 6
- 230000003595 spectral effect Effects 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 17
- 239000011159 matrix material Substances 0.000 claims description 5
- 230000004927 fusion Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000000701 chemical imaging Methods 0.000 description 3
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- 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
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- 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
- G01J3/0202—Mechanical elements; Supports for optical elements
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- 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
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0224—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using polarising or depolarising elements
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Abstract
The invention discloses an optical imaging detection device based on polarization time-sharing spectrum synchronization, which aims to solve the technical problems that the optical imaging detection device in the prior art cannot realize the precise multi-angle accurate acquisition of linear polarization information and the synchronous snapshot acquisition of spectrum information; the front optical telescope unit collimates and emits the target reflected light; the imaging lens group images the collimated target reflected light on the focal plane of the polarization spectrum unit; the polarization spectrum unit comprises a polarization component, a spectrum modulation component and a spectrum detector which are arranged in sequence; and the control and signal processing unit receives the polarization spectrum image, performs real-time preprocessing and reconstructs and fuses multidimensional information. The invention realizes the capabilities of fine multi-angle acquisition of linear polarization information and synchronous spectrum snapshot acquisition, improves the applicability and can greatly reduce the volume.
Description
Technical Field
The invention relates to an optical imaging detection device, in particular to an optical imaging detection device based on polarization time-sharing spectrum synchronization.
Background
The spectral imaging and the polarization imaging are combined to form a novel optical remote sensing technology, namely a polarization spectral imaging technology, which is a novel detection technology capable of integrating image information, spectral information and polarization state information of a target, has obvious principle advancement and technical advantages, and spectral imaging equipment possibly has the phenomena of 'same-spectrum foreign matter' and 'same-object different-spectrum', and is possibly limited in the aspect of accuracy of target identification. After polarization information is added to the image and the spectrum information, the optimal detection and identification capability can be achieved. The method is particularly suitable for target detection under the conditions of turbid media (smoke, fog, haze, dust, water bodies and the like), and can greatly extend detection areas at the dark-bright ends of remote sensing due to the characteristics of strong light weakening and weak light strengthening of polarization states. Meanwhile, the atmospheric attenuation can be accurately depicted and regularly found by using a polarization means, and an objective basis can be provided for a new atmospheric window theory.
However, the existing polarization spectrum imaging detection technology has poor applicability under the condition of rapid change of the polarization state, and cannot realize precise multi-angle acquisition of linear polarization information and synchronous snapshot acquisition of spectrum information.
Disclosure of Invention
The invention aims to solve the technical problems that the optical imaging detection device in the prior art cannot realize fine multi-angle accurate acquisition of linear polarization information and synchronous snapshot acquisition of spectral information, and provides the optical imaging detection device based on polarization time-sharing spectral synchronization.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an optical imaging detection device based on polarization time-sharing spectrum synchronization is characterized in that: the device comprises a front optical telescope unit, an imaging lens group, a polarization spectrum unit and a control and signal processing unit which are sequentially arranged along a light path;
the front optical telescope unit collimates and emits target reflected light;
the imaging mirror group images the collimated target reflected light on the focal plane of the polarization spectrum unit;
the polarization spectrum unit comprises a polarization component, a spectrum modulation component and a spectrum detector which are arranged in sequence;
the polarization component comprises a linear polarizer and a rotating component; the polaroid is arranged on the rotating assembly, and the rotating assembly drives the linear polaroid to rotate, so that the polarization angle of the linear polaroid is changed;
the spectrum modulation component is used for generating an m multiplied by n dimensional spectrum section, wherein m and n are positive integers, m is more than or equal to 2, and n is more than or equal to 2;
the spectral detector acquires a polarized spectrum image of the transmission light in the polarized state after being modulated by the spectral modulation component;
and the control and signal processing unit receives the polarization spectrum image, performs real-time preprocessing and reconstructs and fuses multidimensional information.
Furthermore, the rotating assembly comprises a fixed seat, a supporting plate vertically arranged on the fixed seat, a motor with a body arranged on the fixed seat, a rotating cylinder arranged between the supporting plate and the motor and a transmission assembly; one end of the rotating cylinder is mounted on the supporting plate, the other end of the rotating cylinder is connected with the output end of the motor through the transmission assembly, and the linear polarizer is mounted in the rotating cylinder, so that the motor drives the rotating cylinder to rotate on the supporting plate through the transmission assembly, and the linear polarizer is rotated to change the polarization angle of the linear polarizer; the motor is connected with the control and signal processing unit.
Further, the spectral modulation assembly is configured by a plurality of filters with different wave bands in an m × n matrix form.
Furthermore, the transmission assembly comprises a driving wheel arranged on the motor, a driven wheel arranged on the rotary drum, and a synchronous transmission belt arranged on the driving wheel and the driven wheel.
Furthermore, the front optical telescope unit comprises a front lens group, a field diaphragm and a collimating lens group which are sequentially arranged along an optical path;
the front lens group realizes the front collection of target reflected light, the target reflected light is incident to the field diaphragm, the field diaphragm performs field selection adjustment on the target reflected light, and then the target reflected light is collimated by the collimating lens group and emitted to the imaging lens group.
Further, an output unit is included for outputting the reconstructed and fused image.
Furthermore, the spectrum modulation component is plated on the target surface of the spectrum detector or plated on a glass sheet and placed close to the target surface of the spectrum detector.
The invention has the beneficial effects that:
1. compared with the traditional technology, the optical imaging detection device provided by the invention has the capabilities of realizing fine multi-angle acquisition of linear polarization information and synchronous spectrum snapshot acquisition, and improves the applicability.
2. Compared with the prior art, the optical imaging detection device has the advantage that the volume can be greatly reduced.
3. The optical imaging detection device provided by the invention realizes the capability of detecting any linear polarization direction under the action of the rotating assembly.
4. The optical imaging detection device does not need to be swept, and has good stability.
5. The optical imaging detection device has the advantages of concise light path, simplified system and strong practicability.
Drawings
FIG. 1 is a schematic structural diagram of an optical imaging detection device based on polarization time-sharing spectrum synchronization according to the present invention;
FIG. 2 is a schematic view of the construction of the rotating assembly of the present invention;
FIG. 3 is a schematic view showing a rotation mode of a linearly polarizing plate according to the present invention;
FIG. 4 is a schematic diagram of the spectral modulation assembly of the present invention for generating a spectral band of dimensions m by n.
Description of the drawings:
1-a front optical telescope unit, 11-a front lens group, 12-a field diaphragm and 13-a collimating lens group;
2-an imaging lens group;
3-polarization spectrum unit, 31-polarization component, 311-linear polarizer, 312-rotation component, 3121-fixed seat, 3122-supporting plate, 3123-motor, 3124-rotation cylinder, 3125-transmission component, 3125.1-driving wheel, 3125.2-driven wheel, 3125.3-synchronous driving belt, 32-spectrum modulation component and 33-spectrum detector;
4-a control and signal processing unit;
5-output unit.
Detailed Description
To make the objects, advantages and features of the present invention more clear, an optical imaging detection apparatus based on polarization time-sharing spectrum synchronization according to the present invention is further described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following detailed description. It should be noted that: the drawings are in simplified form and are not to precise scale, the intention being solely for the convenience and clarity of illustrating embodiments of the invention; second, the structures shown in the drawings are often part of actual structures.
The invention relates to an optical imaging detection device based on polarization time-sharing spectrum synchronization, which comprises a front-mounted optical telescope unit 1, an imaging lens group 2, a polarization spectrum unit 3 and a control and signal processing unit 4 which are sequentially arranged along a light path, as shown in figure 1;
the front optical telescope unit 1 collimates and emits the target reflected light; the front optical telescope unit 1 comprises a front lens group 11, a field diaphragm 12 and a collimating lens group 13 which are sequentially arranged along a light path; the front lens group 11 realizes front collection of target reflected light, and the target reflected light is incident to the field diaphragm 12, and the field diaphragm 12 performs field selection adjustment on the target reflected light, and then the target reflected light is collimated and emitted to the imaging lens group 2 through the collimating lens group 13.
The imaging lens group 2 images the collimated target reflected light on the focal plane of the polarization spectrum unit 3;
the polarization spectrum unit 3 comprises a polarization component 31, a spectrum modulation component 32 and a spectrum detector 33 which are arranged in sequence; the polarization member 31 includes a linear polarizer 311 and a rotation member 312; the linear polarizer 311 is disposed on the rotating assembly 312, and the rotating assembly 312 drives the linear polarizer 311 to rotate, so as to change the polarization angle of the linear polarizer 311; the occurrence of an arbitrary polarization state is realized.
As shown in fig. 2 and 3, the rotating assembly 312 includes a fixed seat 3121, a supporting plate 3122 vertically installed on the fixed seat 3121, a motor 3123 whose body is installed on the fixed seat 3121, a rotating cylinder 3124 and a transmission assembly 3125 disposed between the supporting plate 3122 and the motor 3123; one end of the rotary cylinder 3124 is mounted on supporting plate 3122, another end is connected with output end of the motor 3123 through the transmission assembly 3125, the linear polaroid 311 is mounted in rotary cylinder 3124; the transmission assembly 3125 includes a driving wheel 3125.1 mounted on the motor 3123, a driven wheel 3125.2 mounted on the rotary drum 3124, and a timing belt 3125.3 mounted on the driving wheel 3125.1 and the driven wheel 3125.2; therefore, the motor 3123 drives the driving wheel 3125.1 to rotate, the driven wheel 3125.2 is driven to rotate by the synchronous transmission belt 3125.3, the driven wheel 3125.2 drives the rotary tube 3124 to rotate on the supporting plate 3122, the linear polarizer 311 in the rotary tube 3124 rotates along with the rotation, the polarization angle is changed, and the motor 3123 is connected with the control and signal processing unit 4 and is driven and controlled by the control and signal processing unit 4.
The spectrum modulation assembly 32 is used for generating m × n-dimensional spectral bands, wherein m and n are positive integers, m is more than or equal to 2, n is more than or equal to 2, the spectrum modulation assembly 32 is formed by configuring a plurality of optical filters with different wave bands in a m × n matrix form, the optical filters are substantially a spectral diaphragm with m × n-dimensional spectral bands, the spectral diaphragm is coated on the target surface of the spectrum detector 33 and can also be coated on a glass sheet and is arranged close to the target surface of the spectrum detector 33, and the spectral bands with m × n corresponding to the matrix are uniformly grouped on the target surface of the detector to realize the purpose of uniformly grouping the spectral bands with m × n corresponding to the matrix。A11、A12……AmnThe method is characterized in that the method respectively corresponds to different spectrum bands, the number of the spectrum bands is m × n, and the target surface of the detector realizes chip-level snapshot spectrum detection through n groups of corresponding combinations:
the spectrum detector 33 acquires a polarization spectrum image of the transmission light in the polarization state after being modulated by the spectrum modulation component 32;
the control and signal processing unit 4 comprises a signal receiving and real-time preprocessing module and an information reconstruction and fusion module, and is used for receiving the polarization spectrum image, performing real-time preprocessing and multi-dimensional information reconstruction and fusion, and finally outputting the polarization spectrum image and the multi-dimensional information by the output unit 5.
The detection mode is as follows: the target reflected light enters the polarization spectrum unit 3 after sequentially passing through the front optical system 1 and the imaging lens group 2, so that the polarization and spectrum modulation of the target reflected light are realized and output, the rotation and selection of the linear polarizer 311 are realized by selecting the polarization state through an electric tuning driving motor, and the acquisition of the linear polarization state of any angle can be realized; and finally, the image is formed on a detector 33 through a spectrum modulation component 32, the signal receiving and preprocessing, the information reconstruction and the information fusion are realized through a control and signal processing unit 4, and finally, the image is output to a terminal through an output unit 5.
Claims (7)
1. An optical imaging detection device based on polarization time-sharing spectrum synchronization is characterized in that: the device comprises a front-mounted optical telescope unit (1), an imaging lens group (2), a polarization spectrum unit (3) and a control and signal processing unit (4) which are sequentially arranged along a light path;
the front optical telescope unit (1) collimates and emits target reflected light;
the imaging lens group (2) images the collimated target reflected light on the focal plane of the polarization spectrum unit (3);
the polarization spectrum unit (3) comprises a polarization component (31), a spectrum modulation component (32) and a spectrum detector (33) which are arranged in sequence;
the polarization component (31) comprises a linear polarizer (311) and a rotation component (312); the linear polarizer (311) is arranged on a rotating component (312), and the rotating component (312) drives the linear polarizer (311) to rotate, so that the polarization angle of the linear polarizer (311) is changed;
the spectrum modulation component (32) is used for generating an m multiplied by n dimensional spectrum section, wherein m and n are positive integers, m is more than or equal to 2, and n is more than or equal to 2;
the spectrum detector (33) acquires a polarization spectrum image of the transmission light in the polarization state after being modulated by the spectrum modulation component (32);
and the control and signal processing unit (4) receives the polarization spectrum image, performs real-time preprocessing and reconstructs and fuses multi-dimensional information.
2. The optical imaging detection device based on polarization time-sharing spectrum synchronization of claim 1, characterized in that: the rotating assembly (312) comprises a fixed seat (3121), a supporting plate (3122) vertically mounted on the fixed seat (3121), a motor (3123) whose body is mounted on the fixed seat (3121), a rotating cylinder (3124) disposed between the supporting plate (3122) and the motor (3123), and a transmission assembly (3125); one end of the rotating cylinder (3124) is mounted on the supporting plate (3122), the other end of the rotating cylinder is connected with the output end of the motor (3123) through the transmission assembly (3125), and the linear polarizer (311) is mounted in the rotating cylinder (3124), so that the motor (3123) drives the rotating cylinder (3124) to rotate on the supporting plate (3122) through the transmission assembly (3125), thereby rotating the linear polarizer (311) and changing the polarization angle thereof; the motor (3123) is connected with a control and signal processing unit (4).
3. The optical imaging detection device based on polarization time-sharing spectrum synchronization as claimed in claim 1 or 2, characterized in that: the spectral modulation assembly (32) is configured by a plurality of filters with different wave bands in an m multiplied by n matrix form.
4. The optical imaging detection device based on polarization time-sharing spectrum synchronization of claim 2, characterized in that: the transmission assembly (3125) comprises a driving wheel (3125.1) mounted on the motor (3123), a driven wheel (3125.2) mounted on the rotary drum (3124), and a synchronization transmission belt (3125.3) mounted on the driving wheel (3125.1) and the driven wheel (3125.2).
5. The optical imaging detection device based on polarization time-sharing spectrum synchronization of claim 1, characterized in that:
the front optical telescope unit (1) comprises a front lens group (11), a field diaphragm (12) and a collimating lens group (13) which are sequentially arranged along a light path;
the front-mounted lens group (11) realizes front-mounted collection of target reflected light, the target reflected light is incident to the field diaphragm (12), the field diaphragm (12) performs field selection adjustment on the target reflected light, and the target reflected light is collimated and emitted to the imaging lens group (2) through the collimating lens group (13).
6. The optical imaging detection device based on polarization time-sharing spectrum synchronization of claim 1, characterized in that: the image fusion device further comprises an output unit (5) for outputting the reconstructed and fused images.
7. The optical imaging detection device based on polarization time-sharing spectrum synchronization of claim 3, characterized in that: the spectral modulation component (32) is plated on the target surface of the spectral detector (33) or is plated on a glass sheet and is placed close to the target surface of the spectral detector (33).
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Cited By (2)
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| CN112684609A (en) * | 2021-03-19 | 2021-04-20 | 中国科学院西安光学精密机械研究所 | Aperture-division compact type wide-band polarization simultaneous imaging device and system |
| CN114236866A (en) * | 2022-02-12 | 2022-03-25 | 南京工程学院 | Terahertz polarization adjusting system based on metal wire grid terahertz wire polarizer |
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