CN205123883U - Shortwave infrared imaging system based on inGaAs detector - Google Patents
Shortwave infrared imaging system based on inGaAs detector Download PDFInfo
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- CN205123883U CN205123883U CN201520942079.XU CN201520942079U CN205123883U CN 205123883 U CN205123883 U CN 205123883U CN 201520942079 U CN201520942079 U CN 201520942079U CN 205123883 U CN205123883 U CN 205123883U
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Abstract
The utility model discloses a shortwave infrared imaging system based on inGaAs detector, include: a signal processing module for obtaining the optical system of shortwave infrared light radiation and focus converts the shortwave infrared light radiation after the optical system focus shortwave infrared detector of the signal of telecommunication to, and be connected with shortwave infrared detector's output and enlarge and the digitalized treatment the signal of telecommunication that shortwave infrared detector produced to reach the display module that is connected and carries out the image signal that signal processing module exported output display with signal processing module's output. The utility model discloses because the ultra -red unique spectrum effect of shortwave not only makes this system can have good imaging under the condition of low visibility such as haze, rainy day or night, adaptability is strong, has still realized distance control far away formation of image, has improved the night vision effect of inGaAs detector, has realized all -weather self -adaptation real time monitoring.
Description
Technical field
The utility model relates to a kind of short-wave infrared imaging system based on InGaAs detector, belongs to photoelectric imaging technology field.
Background technology
Current common watch-dog has visible ray, low-light and LONG WAVE INFRARED system, visible ray nighttime imaging weak effect, needs to add the illumination of laser light filling, but laser can cause certain injury to human body; Low-light level imaging poor contrast, instantaneous dynamic range is poor, high-gain time have scintillation; LONG WAVE INFRARED thermal imaging relies on object and background radiation to produce image, is only sensitive to the radiation of target scene, and insensitive to scene brightness change, and therefore resolution is low; Several equipment is all general at greasy weather imaging effect above.Short-wave infrared is the important application wave band in infrared acquisition field, its imaging band is at 0.9-1.7 μm, be in three atmospheric windows, many objects have unique spectral effects under this wave band, special under the condition that the visibility such as haze, rainy day or night are lower, short-wave infrared imaging has the advantage of its uniqueness.
Utility model content
The utility model is in order to overcome the deficiency of above technology, provide a kind of short-wave infrared imaging system based on InGaAs detector, due to the unique spectrum effect of short-wave infrared, not only make the imaging effect that this system can have under the condition of the low visibility such as haze, rainy day or night, adaptable, also achieve remote monitor imaging, improve the night vision effect of InGaAs detector, achieve all-weather self-adapting and monitor in real time.
the utility model overcomes the technical scheme that its technical problem adopts:
Based on a short-wave infrared imaging system for InGaAs detector, comprising:
For obtaining short-wave infrared light radiation and the optical system focused on,
Short-wave infrared light radiation after optics into focus is converted to the short-wave infrared detector of the signal of telecommunication,
Be connected with the output of short-wave infrared detector and the signal of telecommunication that short-wave infrared detector produces amplified and the signal processing module of digitized processing, and
To be connected with the output of signal processing module and the picture signal exported by signal processing module carries out the display module of output display;
Described signal processing module comprises analog signal conditioner circuit, A/D change-over circuit, logical-sequential control circuit, Voltag driving circuit and governor circuit, described analog signal conditioner circuit is connected with the output of short-wave infrared detector and follows the signal that short-wave infrared detector exports, filtering, gain and amplitude adjustment, A/D change-over circuit is connected with the output of analog signal conditioner circuit and carries out analog-to-digital conversion to the analog signal after nursing one's health, the output of A/D change-over circuit is connected the digital data transmission after changing with logical-sequential control circuit to logical-sequential control circuit, logical-sequential control circuit by Voltag driving circuit for short-wave infrared detector provides bias voltage, the drive output of logical-sequential control circuit is connected respectively to analog signal conditioner circuit and A/D change-over circuit provides driving for it, governor circuit to be connected with logical-sequential control circuit by RS232 interface and to carry out Control on Communication to system, the signal output part of logical-sequential control circuit is connected with display module.
Preferred according to the utility model, described signal processing module also comprises video d/a transducer, and the signal output part of logical-sequential control circuit is connected video signal transmission to display module with display module by video d/a transducer.
Preferred according to the utility model, described logical-sequential control circuit comprises NIOS II processor, complete the FPGA of whole system sequencing control and logic control, for running NIOS II program and storing the DDR of temporary variable and intermediate data, and for storing the series arrangement chip EPCS of FPGA configuration information, NIOS II program, Nonuniformity Correction coefficient and the data that need power down to preserve, described DDR is all connected with FPGA with series arrangement chip EPCS.
Preferred according to the utility model, described optical system is the set of lenses of mechanical type compensation for negative group zoom.
Preferred according to the utility model, described short-wave infrared detector is the InGaAs focal plane array detector of 320 × 256, and pixel dimension is 30 μm × 30 μm, and service band is 0.9-1.7 μm.
Preferred according to the utility model, described display module is display.
the beneficial effects of the utility model are:
The utility model is due to the unique spectrum effect of short-wave infrared, not only make the imaging effect that this system can have under the condition of the low visibility such as haze, rainy day or night, adaptable, also achieve remote monitor imaging, improve the night vision effect of InGaAs detector, achieve all-weather self-adapting to monitor in real time, the emergency processing of prediction, prevention, early warning, investigation and evidence collection etc. of social security of consolidating national defense, safeguard national security, strengthen, traffic and oilfield safety monitoring and burst, social event, criminal case is played a significant role.
Accompanying drawing explanation
Fig. 1 is the principle schematic of short-wave infrared imaging system of the present utility model.
Fig. 2 is the structural representation of short-wave infrared imaging system of the present utility model.
Fig. 3 is the flow chart of data processing figure of short-wave infrared imaging system of the present utility model.
In figure, 1, optical system, 2, short-wave infrared detector, 3, signal processing module, 4, display module, 31, analog signal conditioner circuit, 32, A/D change-over circuit, 33, logical-sequential control circuit, 34, Voltag driving circuit, 35, governor circuit, 36, video d/a transducer.
Embodiment
Better understand the utility model for the ease of those skilled in the art, be described in further details below in conjunction with the drawings and specific embodiments to the utility model, following is only exemplary do not limit protection range of the present utility model.
As shown in Figure 1, short-wave infrared imaging system based on InGaAs detector of the present utility model, comprise: for obtaining short-wave infrared light radiation and the optical system 1 focused on, short-wave infrared light radiation after optics into focus is converted to the short-wave infrared detector 2 of the signal of telecommunication, be connected with the output of short-wave infrared detector and the signal of telecommunication that short-wave infrared detector produces is amplified and the signal processing module 3 of digitized processing, and to be connected with the output of signal processing module and the picture signal exported by signal processing module carries out the display module 4 of output display.Described optical system 1 adopts the set of lenses of mechanical type compensation for negative group zoom, can realize 10 times of continuous vari-focus, compact conformation; Camera lens adopts short-wave infrared continuous vari-focus technology, and in zooming procedure, image is clear constantly, can search for target, small field of view can examine target again by Large visual angle, and can not lose objects information in zooming procedure.Camera lens employs aspheric surface, ensure that excellent picture element, and reduces production cost; All eyeglasses are all coated with visible ray anti-reflection film, to increase light transmittance.Described short-wave infrared detector 2 adopts the InGaAs focal plane array detector of 320 × 256, and pixel dimension is 30 μm × 30 μm, and service band is 0.9-1.7 μm; In short-wave infrared detector, each reading circuit comprises the modules such as CTIA integrator, sampling hold circuit, output stage, Digital Logic control and bias voltage generation, and single channel exports analog video signal; The mode of operation of described reading circuit is readout mode after first integration, and a clock cycle reads 2 signals, and the clock cycle is 0.5-5MHz, realizes the read frequency of 1-10MHz, and for realizing the video flowing collection of 25Hz, the read frequency that system adopts is 6MHz.Described display module 4 is display.
Wherein, signal processing module 3, as shown in Figure 2, comprise analog signal conditioner circuit 31, A/D change-over circuit 32, logical-sequential control circuit 33, Voltag driving circuit 34 and governor circuit 35, described analog signal conditioner circuit 31 be connected with the output of short-wave infrared detector 2 and the signal that short-wave infrared detector exports is followed, filtering, gain and amplitude adjust, to meet the input dynamic range of A/D change-over circuit 2.A/D change-over circuit 32 is connected with the output of analog signal conditioner circuit 31 and carries out 16bit analog-to-digital conversion to the analog signal after nursing one's health, and the output of A/D change-over circuit 32 is connected the digital data transmission after changing with logical-sequential control circuit 33 to logical-sequential control circuit.Logical-sequential control circuit 33 is sequencing control cores of whole system, produce the driver' s timing of short-wave infrared detector and the Control timing sequence required for other circuit modules, and complete the real-time preliminary treatment of view data, comprise Nonuniformity Correction (blind element correction), image enhaucament and gamma correction etc., control and communication interface can also be externally provided.Logical-sequential control circuit 33 by Voltag driving circuit 34 for short-wave infrared detector 2 provides bias voltage, the drive output of logical-sequential control circuit 33 is connected respectively to analog signal conditioner circuit 31 and A/D change-over circuit 32 provides driving for it, governor circuit 35 to be connected with logical-sequential control circuit 33 by RS232 interface and to carry out Control on Communication to system, the signal output part of logical-sequential control circuit 33 is connected video signal transmission to display module with display module 4 by video d/a transducer 36, data after data processing coding export with pal mode by display module 4.
Logical-sequential control circuit 33 comprises NIOS II processor, complete the FPGA of whole system sequencing control and logic control, for running NIOS II program and storing the DDR of temporary variable and intermediate data, and for storing the series arrangement chip EPCS of FPGA configuration information, NIOS II program, Nonuniformity Correction coefficient and the data that need power down to preserve, described DDR is all connected with FPGA with series arrangement chip EPCS.Each hardware module VERILOGHDL language compilation in logical-sequential control circuit 33, is articulated in AVALON bus, by NIOS II processor scheduling, and completes the exchanges data of each intermodule.Adopt SOPC method for designing exploitation infrared focus plane cartridge assemblies, except analog-to-digital conversion (A/D) and digital-to-analogue conversion (D/A), all Digital Signal Processing all complete in FPGA, comprise for system provides all sequential needed for work, complete nonuniformity correction, produce synchronizing signal, the simulation of control chart image signal exports with numeral, realize external interface, the Word message be simultaneously inserted with in video signals.External control order sends into NIOS II processor by asynchronism transceiver UART, is completed configuration and the system management function of each hardware module by NIOS II processor.
After system electrification, FPGA reads in configuration information from series arrangement chip EPCS, complete FPGA hardware configuration, and program code is transferred to DDR from series arrangement chip EPCS run, short-wave infrared detector 2 is outputting analog signal under bias voltage and driving pulse effect, A/D change-over circuit 32 is entered through analog signal conditioner circuit 31, digital signal after conversion gives FPGA, through Nonuniformity Correction (blind element correction), the analog video signal that video d/a transducer 36 exports PLA standard is given again after the process such as image enhaucament and gamma correction, through display screen 4, image is shown.Flow chart of data processing figure of the present utility model as shown in Figure 3.
Above only describes general principle of the present utility model and preferred implementation, those skilled in the art can make many changes and improvements according to foregoing description, and these changes and improvements should belong to protection range of the present utility model.
Claims (6)
1., based on a short-wave infrared imaging system for InGaAs detector, it is characterized in that, comprising:
For obtaining short-wave infrared light radiation and the optical system (1) focused on,
Short-wave infrared light radiation after optics into focus is converted to the short-wave infrared detector (2) of the signal of telecommunication,
Be connected with the output of short-wave infrared detector and the signal of telecommunication that short-wave infrared detector produces amplified and the signal processing module (3) of digitized processing, and
To be connected with the output of signal processing module and the picture signal exported by signal processing module carries out the display module (4) of output display;
Described signal processing module (3) comprises analog signal conditioner circuit (31), A/D change-over circuit (32), logical-sequential control circuit (33), Voltag driving circuit (34) and governor circuit (35), described analog signal conditioner circuit (31) is connected with the output of short-wave infrared detector (2) and follows the signal that short-wave infrared detector exports, filtering, gain and amplitude adjustment, A/D change-over circuit (32) is connected with the output of analog signal conditioner circuit (31) and carries out analog-to-digital conversion to the analog signal after nursing one's health, the output of A/D change-over circuit (32) is connected the digital data transmission after changing with logical-sequential control circuit (33) to logical-sequential control circuit, logical-sequential control circuit (33) by Voltag driving circuit (34) for short-wave infrared detector (2) provides bias voltage, the drive output of logical-sequential control circuit (33) is connected respectively to analog signal conditioner circuit (31) and A/D change-over circuit (32) provides driving for it, governor circuit (35) to be connected with logical-sequential control circuit (33) by RS232 interface and to carry out Control on Communication to system, the signal output part of logical-sequential control circuit (33) is connected with display module (4).
2. imaging system according to claim 1, it is characterized in that: described signal processing module (3) also comprises video d/a transducer (36), the signal output part of logical-sequential control circuit (33) is connected video signal transmission to display module with display module (4) by video d/a transducer (36).
3. imaging system according to claim 1 and 2, it is characterized in that: described logical-sequential control circuit (33) comprises NIOS II processor, complete the FPGA of whole system sequencing control and logic control, for running NIOS II program and storing the DDR of temporary variable and intermediate data, and for storing the series arrangement chip EPCS of FPGA configuration information, NIOS II program, Nonuniformity Correction coefficient and the data that need power down to preserve, described DDR is all connected with FPGA with series arrangement chip EPCS.
4. imaging system according to claim 1, is characterized in that: the set of lenses that described optical system (1) is mechanical type compensation for negative group zoom.
5. imaging system according to claim 1, is characterized in that: described short-wave infrared detector (2) is the InGaAs focal plane array detector of 320 × 256, and pixel dimension is 30 μm × 30 μm, and service band is 0.9-1.7 μm.
6. imaging system according to claim 1, is characterized in that: described display module (4) is display.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106506996A (en) * | 2016-11-11 | 2017-03-15 | 山东大学 | A kind of short-wave infrared imaging system illuminated based on linear array laser and its method of work |
| CN106546897A (en) * | 2016-11-01 | 2017-03-29 | 山东大学 | Solar cell luminescence generated by light high-speed detection system and its operation method based on short-wave infrared imager |
| CN106941592A (en) * | 2017-04-15 | 2017-07-11 | 四川新三甲电子科技有限公司 | IR night vision apparatus and system |
| CN108844637A (en) * | 2018-07-25 | 2018-11-20 | 山东大学 | A kind of InGaAs FPAs assembly property assessment device and its application based on picture quality |
| CN109587380A (en) * | 2018-12-06 | 2019-04-05 | 天津津航技术物理研究所 | Minimize hot operation multiplex roles refrigeration mode infrared imaging device |
| CN110595626A (en) * | 2019-09-18 | 2019-12-20 | 深圳市一体医疗科技有限公司 | Infrared detector system and imaging method |
| CN110686783A (en) * | 2019-09-12 | 2020-01-14 | 山东大学 | Blind pixel detection method and image processing method for InGaAs short-wave infrared imager |
| CN112118379A (en) * | 2020-10-26 | 2020-12-22 | 国网河南省电力公司濮阳供电公司 | Power equipment inspection device under power grid emergency repair night vision environment and working method |
| CN113820753A (en) * | 2021-09-01 | 2021-12-21 | 中国科学院长春光学精密机械与物理研究所 | Electronic system capable of imaging visible spectrum band and short wave infrared spectrum band simultaneously |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106546897A (en) * | 2016-11-01 | 2017-03-29 | 山东大学 | Solar cell luminescence generated by light high-speed detection system and its operation method based on short-wave infrared imager |
| CN106506996B (en) * | 2016-11-11 | 2019-03-08 | 山东大学 | A kind of short-wave infrared imaging system and its working method based on linear array laser illumination |
| CN106506996A (en) * | 2016-11-11 | 2017-03-15 | 山东大学 | A kind of short-wave infrared imaging system illuminated based on linear array laser and its method of work |
| CN106941592A (en) * | 2017-04-15 | 2017-07-11 | 四川新三甲电子科技有限公司 | IR night vision apparatus and system |
| CN108844637B (en) * | 2018-07-25 | 2020-05-26 | 山东大学 | InGaAs FPAs assembly performance evaluation device based on image quality and application thereof |
| CN108844637A (en) * | 2018-07-25 | 2018-11-20 | 山东大学 | A kind of InGaAs FPAs assembly property assessment device and its application based on picture quality |
| CN109587380A (en) * | 2018-12-06 | 2019-04-05 | 天津津航技术物理研究所 | Minimize hot operation multiplex roles refrigeration mode infrared imaging device |
| CN109587380B (en) * | 2018-12-06 | 2020-04-28 | 天津津航技术物理研究所 | Miniaturized high-temperature working multi-interface refrigeration type infrared imager |
| CN110686783A (en) * | 2019-09-12 | 2020-01-14 | 山东大学 | Blind pixel detection method and image processing method for InGaAs short-wave infrared imager |
| CN110686783B (en) * | 2019-09-12 | 2020-11-20 | 山东大学 | Blind pixel detection method and image processing method for InGaAs short-wave infrared imager |
| CN110595626A (en) * | 2019-09-18 | 2019-12-20 | 深圳市一体医疗科技有限公司 | Infrared detector system and imaging method |
| CN112118379A (en) * | 2020-10-26 | 2020-12-22 | 国网河南省电力公司濮阳供电公司 | Power equipment inspection device under power grid emergency repair night vision environment and working method |
| CN113820753A (en) * | 2021-09-01 | 2021-12-21 | 中国科学院长春光学精密机械与物理研究所 | Electronic system capable of imaging visible spectrum band and short wave infrared spectrum band simultaneously |
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