CN107018388B - A kind of ultrahigh speed real-time color calculates the device and method of ghost imaging - Google Patents
A kind of ultrahigh speed real-time color calculates the device and method of ghost imaging Download PDFInfo
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- CN107018388B CN107018388B CN201710115013.7A CN201710115013A CN107018388B CN 107018388 B CN107018388 B CN 107018388B CN 201710115013 A CN201710115013 A CN 201710115013A CN 107018388 B CN107018388 B CN 107018388B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
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Abstract
The invention discloses the device and methods that a kind of ultrahigh speed real-time color calculates ghost imaging, including random speckle emission source, lens, point detector and computer, wherein, object to be imaged is between random speckle emission source and lens, the light that random speckle emission source issues is through on object to be imaged and lens entrance to the photosurface of point detector, the control terminal of random speckle emission source and the output end of point detector are connected to a computer；The random speckle emission source is LED array, which realizes the imaging to high-speed moving object object, and image-forming range range is larger, and the resolution ratio of imaging is higher, and Ability of Resisting Disturbance is strong, and image taking speed is fast.
Description
Technical field
The invention belongs to target imaging field of detecting, it is related to device and side that a kind of ultrahigh speed real-time color calculates ghost imaging
Method.
Background technique
The development of ghost imaging, which successively experienced, tangles the imaging of two-photon ghost, counterfeit hot light ghost imaging, very hot light ghost imaging, reflection
The stages such as the imaging of light ghost and calculating ghost imaging.Nineteen ninety-five, Shi Yanhua group, University of Maryland realizes for the first time to be based on tangling
The ghost imaging of two-photon pair.2006, Scarcelli et al. using classical counterfeit thermal light source realize the hot light ghost of no lens at
Picture.Subsequent Wu Lingan group realizes very hot light ghost as light source using rubidium hollow-cathode lamp and is imaged, and calculating ghost imaging can
To realize super-resolution imaging, without lens imaging, the advantage that there is tradition imaging not have.But it calculates ghost imaging and needs largely
Sampling be associated operation, therefore the image taking speed of traditional calculating ghost imaging is slower, be ultimately imaged frame frequency less than 10Hz, by
It is limited to the slow characteristic of image taking speed, nobody carried out the research that ultrahigh speed calculates ghost imaging before.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of ultrahigh speed real-time color calculating ghost is provided
The device and method of imaging, the device and method realize imaging to high-speed moving object object, and image-forming range range compared with
Greatly, the resolution ratio of imaging is higher, and Ability of Resisting Disturbance is strong, and image taking speed is fast.
In order to achieve the above objectives, the device that ultrahigh speed real-time color of the present invention calculates ghost imaging includes random speckle
Emission source, lens, point detector and computer, wherein object to be imaged is between random speckle emission source and lens, at random
The light that speckle emission source issues through on object to be imaged and lens entrance to the photosurface of point detector, random speckle emission source
The output end of control terminal and point detector is connected to a computer；
The random speckle emission source is LED array.
The LED array is primitive colours LED array.
Ultrahigh speed real-time color of the present invention calculate the method for ghost imaging the following steps are included:
Random speckle emission source issues the signal light of random default speckle field, and the signal light of the random default speckle field shines
It is mapped to through on object to be imaged, point detector detects the intensity signal of the light after object to be imaged is transmitted and reflected, and will visit
The intensity signal of the light after object transmission or reflection to be imaged measured is forwarded in computer, computer according to through at
Subject image C (the ρ recovered as the intensity signal of the light after object transmission or reflection1), wherein speckle field is then preset at random
Signal light propagation L distance after field strength distribution I1(t) are as follows:
I1(t)=| E1(ρ1,t)|2
Wherein, spacing of the L between random speckle emission source and object to be imaged, E1(ρ1, t) and it is to preset speckle field at random
Signal light propagation L distance after hot spot distribution；
The intensity signal I that point detector detects2(t) are as follows:
Wherein, E2(ρ2, t) be body surface to be imaged optical field distribution, T be object to be imaged aperture function, η is a little
The optical field distribution on the detection efficient surface of detector；
The then subject image C (ρ that computer recovers1) are as follows:
Wherein, aL=2L/k0ρ0,ρL=2L/k0a0,k0=2 π/λ, k0For wave vector, ρ (0) is the phase of random speckle emission source
Dried noodle product, a (L) are intensity radius when light field reaches object to be imaged, and ρ (L) is being concerned with when light field reaches object to be imaged
Area, λ are the wavelength for the light that random speckle emission source issues, and L is distance of the random speckle emission source apart from object to be imaged, q
For electronic charge, η is the quantum efficiency of point detector, A1Paraxial approximation to be calculated propagates the hot spot distribution area of L,
P is the Intensity Fluctuation for the light that random speckle emission source issues, A2For the area of lens.
Hot spot after the signal light propagation L distance of speckle field is distributed E1(ρ1, t) expression formula are as follows:
Body surface optical field distribution E to be imaged2(ρ2, t) expression formula are as follows:
The invention has the following advantages:
Ultrahigh speed real-time color of the present invention calculates the device and method of ghost imaging when specific operation, with LED gusts
Column are introduced as random speckle source calculates ghost imaging, realizes that ultrahigh speed real-time color calculates ghost imaging, specifically, by dissipating at random
Spot emission source issues the signal light of random default speckle field, and the signal light of the random default speckle field is irradiated to object to be imaged
On, the intensity signal of light of the point detector detection after object to be imaged is transmitted and reflected, computer is according to through object to be imaged
Subject image C (the ρ that the intensity signal of light after transmission and reflection recovers1).It should be noted that the present invention is with LED gusts
Column are used as random speckle emission source so that the rate of the signal light for the random default speckle field that random speckle emission source issues compared with
Greatly, ghost image image taking speed is calculated to effectively improve, realizes the imaging to high-speed moving object object, and the resolution being imaged
Rate, image-forming range range and image quality are significantly improved, and are not influenced by ambient temperature and humidity variation, are had
Good anti-interference dynamic characteristic.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the prior art；
Fig. 2 is structural schematic diagram of the invention.
Wherein, 1 it is random speckle emission source, 2 be object to be imaged, 3 be lens, 4 is point detector.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
Ultrahigh speed real-time color of the present invention calculate ghost imaging device include random speckle emission source 1, lens 3,
Point detector 4 and computer, wherein object 2 to be imaged is between random speckle emission source 1 and lens 3, random speckle transmitting
The light that source 1 issues is incident on the photosurface of point detector 4 through object 2 to be imaged and lens 3, the control of random speckle emission source 1
The output end of end processed and point detector 4 is connected to a computer；The random speckle emission source 1 is LED array, and LED array is
Primitive colours LED array.
Ultrahigh speed real-time color of the present invention calculate the method for ghost imaging the following steps are included:
Random speckle emission source 1 issues the signal light of random default speckle field, the signal light of the random default speckle field
It is irradiated to through on object 2 to be imaged, point detector 4 detects the intensity signal of the light after object 2 to be imaged transmits and reflects, and
The intensity signal of the light after 2 transmission or reflection of object to be imaged that detection obtains is forwarded in computer, computer according to
Subject image C (the ρ that the intensity signal of light after 2 transmission or reflection of object to be imaged recovers1), wherein it is then random pre-
If the field strength distribution I after the signal light propagation L distance of speckle field1(t) are as follows:
I1(t)=| E1(ρ1,t)|2
Wherein, spacing of the L between random speckle emission source 1 and object to be imaged 2, E1(ρ1, t) and it is to preset speckle at random
Hot spot distribution after the signal light propagation L distance of field；
The intensity signal I that point detector 4 detects2(t) are as follows:
Wherein, E2(ρ2, t) be 2 surface of object to be imaged optical field distribution, T is the aperture function of object 2 to be imaged, and η is
The optical field distribution on the detection efficient surface of point detector 4；
The then subject image C (ρ that computer recovers1) are as follows:
Wherein, aL=2L/k0ρ0,ρL=2L/k0a0,k0=2 π/λ, k0For wave vector, ρ (0) is the phase of random speckle emission source 1
Dried noodle product, a (L) are intensity radius when light field reaches object 2 to be imaged, and ρ (L) is phase when light field reaches object 2 to be imaged
Dried noodle product, λ are the wavelength for the light that random speckle emission source 1 issues, L be random speckle emission source 1 apart from object 2 to be imaged away from
From q is electronic charge, and η is the quantum efficiency of point detector 4, A1Paraxial approximation to be calculated propagates the hot spot distribution of L
Area, P are the Intensity Fluctuation for the light that random speckle emission source 1 issues, A2For the area of lens 3.
Hot spot after the signal light propagation L distance of speckle field is distributed E1(ρ1, t) expression formula are as follows:
2 surface optical field of object to be imaged is distributed E2(ρ2, t) expression formula are as follows:
The present invention fully considers that no lens imaging, imaging resolution height, Ability of Resisting Disturbance may be implemented than tradition in ghost imaging
The strong advantage of imaging technique, realizes imaging to high-speed moving object object, and either for closely imaging or remote
High-resolution imaging can be achieved in range Imaging, and Ability of Resisting Disturbance is strong and image taking speed is fast.
The present invention using the controllable primitive colours LED array of ultrahigh speed realized as preset speckle source ultrahigh speed colour calculate ghost at
Picture can be applied to swiftly passing object detection, greatly improve the accuracy of high-speed object speed motion detection；It is applied to
Closely be imaged when, be the improvement to traditional medicine optical image technology for fine medical imaging field, using calculate ghost at
The anti-interference dynamic characteristic of picture, available high-resolution, the body structures of high quality and internal organs colored Dynamic Graph shadow, improve
The accuracy of doctor diagnosed, while can also be realized using the characteristic of its high speed imaging and human brain is dynamically observed, greatly
Ground promotes the understanding to human brain mechanism；It is pair for empty day target and Underwater Target Detection when applied to remote imaging
The existing supplement that target acquisition technology is realized by terrible imaging technique, can make up existing calculating ghost imaging and skill is imaged in tradition ghost
The disadvantage that art image taking speed is slow, imaging time is long improves the detection of underwater, empty day and electrical communication system.
Claims (3)
1. a kind of method that ultrahigh speed real-time color calculates ghost imaging, which is characterized in that calculate ghost based on ultrahigh speed real-time color
The device of imaging, the device that the ultrahigh speed real-time color calculates ghost imaging includes random speckle emission source (1), lens (3), point
Detector (4) and computer, wherein object (2) to be imaged is located between random speckle emission source (1) and lens (3), random to dissipate
The light that spot emission source (1) issues is incident on the photosurface of point detector (4) through object to be imaged (2) and lens (3), random to dissipate
The control terminal of spot emission source (1) and the output end of point detector (4) are connected to a computer；
The random speckle emission source (1) is LED array；
The LED array is primitive colours LED array；
The following steps are included:
Random speckle emission source (1) issues the signal light of random default speckle field, and the signal light of the random default speckle field shines
It is mapped to through on object to be imaged (2), the light intensity of light of point detector (4) detection through object to be imaged (2) transmission and after reflecting is believed
Breath, and the intensity signal for the light after object to be imaged (2) transmission or reflection that detection obtains is forwarded in computer, it calculates
Subject image C (the ρ that machine is recovered according to the intensity signal of the light after object to be imaged (2) transmission or reflection1), wherein
Field strength distribution I after then presetting the signal light propagation L distance of speckle field at random1(t) are as follows:
I1(t)=| E1(ρ1,t)|2
Wherein, spacing of the L between random speckle emission source (1) and object to be imaged (2), E1(ρ1, t) and it is to preset speckle at random
Hot spot distribution after the signal light propagation L distance of field；
The intensity signal I that point detector (4) detects2(t) are as follows:
Wherein, E2(ρ2, t) be object to be imaged (2) surface optical field distribution, T is the aperture function of object to be imaged (2), and η is
The optical field distribution on the detection efficient surface of point detector (4)；
The then subject image C (ρ that computer recovers1) are as follows:
Wherein, aL=2L/k0ρ0,ρL=2L/k0a0,k0=2 π/λ, k0For wave vector, ρ (0) is the relevant of random speckle emission source (1)
Area, a (L) they are intensity radius when light field reaches object (2) to be imaged, when ρ (L) is light field arrival object (2) to be imaged
Coherent area, λ are the wavelength for the light that random speckle emission source (1) issues, and q is electronic charge, and η is the amount of point detector (4)
Sub- efficiency, A1Paraxial approximation to be calculated propagates the hot spot distribution area of L, and P is the light that random speckle emission source (1) issues
Intensity Fluctuation, A2For the area of lens (3).
2. the method that ultrahigh speed real-time color according to claim 1 calculates ghost imaging, which is characterized in that the letter of speckle field
Hot spot after number light propagation L distance is distributed E1(ρ1, t) expression formula are as follows:
3. the method that ultrahigh speed real-time color according to claim 1 calculates ghost imaging, which is characterized in that object to be imaged
(2) surface optical field is distributed E2(ρ2, t) expression formula are as follows:
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| CN108600619A (en) * | 2018-04-10 | 2018-09-28 | 西安交通大学 | Terrible imaging method is calculated using LD arrays as the ultrahigh speed that preset light source is realized |
| CN110319790A (en) * | 2019-04-23 | 2019-10-11 | 首都师范大学 | A kind of terrible imaging method of full color calculating based on colored speckle field |
| CN110132324A (en) * | 2019-05-17 | 2019-08-16 | 北京邮电大学 | A kind of real-time display ghost imaging scheme |
| CN110530521B (en) * | 2019-08-13 | 2020-10-27 | 西安交通大学 | Ultrafast detection imaging device and method based on two-photon absorption |
| CN110708471B (en) * | 2019-09-27 | 2020-07-28 | 西安交通大学 | CCD self-correlation imaging system and method based on active illumination |
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| CN105005053A (en) * | 2015-07-13 | 2015-10-28 | 西安电子科技大学 | Random scattering correlated imaging system based on LED illumination, and imaging method thereof |
| CN106019306A (en) * | 2016-05-05 | 2016-10-12 | 西安交通大学 | Underwater target detecting device based on ghost imaging calculation principle |
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| CN105005053A (en) * | 2015-07-13 | 2015-10-28 | 西安电子科技大学 | Random scattering correlated imaging system based on LED illumination, and imaging method thereof |
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