CN106375657A - System for realizing extended depth of field under narrow pulse gating of image intensifier - Google Patents
System for realizing extended depth of field under narrow pulse gating of image intensifier Download PDFInfo
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- CN106375657A CN106375657A CN201610712150.4A CN201610712150A CN106375657A CN 106375657 A CN106375657 A CN 106375657A CN 201610712150 A CN201610712150 A CN 201610712150A CN 106375657 A CN106375657 A CN 106375657A
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- laser
- image intensifier
- optical
- pulse
- gating
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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
- H04N23/60—Control of cameras or camera modules
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- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention relates to a system for realizing an extended depth of field under narrow pulse gating of an image intensifier. The system comprises: a time schedule controller used for forming two types of pulse driving signals via internal pulses; a laser used for generating pulse laser; a laser optical pulse generator used for generating laser optical pulses in an optical manner; a laser driver used for electrically driving the laser; an image intensifier gating driver used for controlling the image intensifier and receiving the control of external pulse control signals at the same time; the image intensifier used for receiving external optical signals and transmitting the signals to a fluorescent screen for being viewed by human eyes; an optical transmitting antenna used for carrying out collimation emission of the laser emitted by the laser to form an illumination area of the system; and an optical receiving antenna used for collecting the external optical signals on the image intensifier. The system provided by the invention obtains optical scene images with extended depths of field in the case of narrow pulse gating imaging of the image intensifier, thereby avoiding the problems of complicated operation and real-time global observation failure caused by images with narrow depths of field, and improving the practicability of the system.
Description
Technical field
The invention belongs to optoelectronic device field, it is related under a kind of image intensifier burst pulse gating, realize the system of the big depth of field.
Background technology
In photoelectric detection equipment field, when needing to carry out background rejecting, signal extraction for certain special applications, need
To adopt certain processing means, gating is exactly the technological means that one of which is commonly used.
For gleam image intensifier, electric impulse signal is applied on the cathode plane of its opto-electronic conversion and drives, this device
External optical signals can be received during pulse is opened the door, not receive outer signals behind the door closing, receive institute such that it is able to selective
The signal needing.And, this pulse enabling signal is narrower, and the external optical signals time receiving is shorter, the external information of acquisition
Fewer.
This technology is often used cooperatively with laser illumination system, by emission pulse laser, forms the moment photograph to scenery
Bright, when image intensifier is received by drive pulse signal gating, it is subjected to this pulse laser.Typically, opening time with swash
The light persistent period quite, can obtain preferable matching.Now, image intensifier can receive the return laser beam letter of scenery
Number, thus lifting the signal intensity of this scenery, realize effectively detecting.
In the facilities for observation that laser and image intensifier are applied in combination, instrument, driven by the pulse of laser and image intensifier
Move and control, can effectively get front scenery.When both are similar to coupling according to width duration time, can effectively obtain
Take the aerial travel path of laser and get the scene image on track.But, the burst pulse gating band of image intensifier
Carry out a very big problem, that is, single is only subjected to the return laser beam in this enabling signal when opening the door, and now gets
The optical imagery depth of field is the space stroke of laser during opening the door.
At this point it is possible to calculate the optics depth of field of this system by below equation:
L=c*t
Wherein l is the optics depth of field, and c is the light velocity, and t is laser entry time.
When carrying out detecting using this pattern, observing so that the optics depth of field that is able to observe that of single is limited, in application-specific
During occasion, which can use, but when it is used for universality facilities for observation, and the optics depth of field is limited, and to bring observation not convenient
Problem.By adjusting the time interval between laser signal and enabling signal, can be by this optics depth of field on locus
Realize adjustment, such that it is able to realize the big depth of field, but such operation needs observer's regulating time parameter, and system can be with not
With the signal intensity adjust automatically inner parameter in the depth of field so that in front and back the image in the optics depth of field of diverse location gray scale occurs
Difference.
For these reasons, the type equipment is when reality is observed on a large scale, there is inconvenient operation it is impossible to quick obtaining
The problem of all images information in range of observation, leads to equipment practicality to decline.
Content of the invention
The technical problem to be solved in the present invention is in the case of laser pulse illumination, is controlled real by the gating of image intensifier
The now effective detection to laser lighting scenery, provides the system realizing the big depth of field under a kind of image intensifier burst pulse gating, passes through
The present invention realizes obtaining the optical scene image of the big depth of field under image intensifier gated detection mode, thus avoiding narrow depth map image-tape
The complex operation come, cannot global observing in real time problem, improve the practicality of such system.
In order to solve above-mentioned technical problem, the invention provides following technical scheme:
The system of the big depth of field is realized, this system includes under a kind of present invention image intensifier burst pulse gating:
Time schedule controller, for occurring to form laser-driven signal and image intensifier drive signal by internal pulses；
Laser instrument, for generating pulse laser；
Laser optics impulse generator, generates laser light pulse for optical mode；
Laser driver, for electrically driven laser instrument；
Image intensifier gate driver, for controlling image intensifier, receives the control of external pulse control signal simultaneously；
Image intensifier, for receive the external world optical signal and by signal change to fluorescent screen for human eye viewing；
Optical transmitting antenna, the laser for emitting laser instrument carries out collimation transmitting, forms the lighting area of system
Domain；
Optical receiver antenna, for collecting in image intensifier by extraneous optical signal.
Further, the persistent period of laser-driven signal and image intensifier drive signal and time interval between the two
All can be adjusted by control sequential controller.
Further, laser optics impulse generator is photoswitch or fuel sheet or chopper.
Further, laser driver can form laser generation transmitting or the direct light arteries and veins forming signal of telecommunication impulse modulation class
Punching transmitting.
Further, the switch gate of image intensifier gate driver control image intensifier, Gain tuning, screen intensity.
Beneficial effects of the present invention: obtain the big depth of field in the case of image intensifier burst pulse gated imaging is realized by the present invention
Optical scene image, thus avoid complex operation that narrow depth image brings, cannot global observing in real time problem, improving should
The practicality of class system.
Brief description
Fig. 1 is the system diagram of the present invention；
Fig. 2 is the depth of field schematic diagram of the present invention.
In figure: 1, time schedule controller, 2, laser instrument, 3, laser optics impulse generator, 4, laser driver, 5, image intensifying
Device gate driver, 6, image intensifier, 7, optical transmitting antenna, 8, optical receiver antenna.
Specific embodiment
Embodiment cited by the present invention, is only intended to help and understands the present invention, should not be construed as protecting model to the present invention
The restriction enclosed, for those skilled in the art, without departing from the inventive concept of the premise, can also be right
The present invention makes improvements and modifications, and these improve and modification also falls in the range of the claims in the present invention protection.
The system of the big depth of field is realized, main technical schemes are as follows under a kind of present invention image intensifier burst pulse gating:
As shown in figure 1, include time schedule controller 1, laser instrument 2, laser optics impulse generator 3, laser driver 4, as
Booster gate driver 5, image intensifier 6, optical transmitting antenna 7, optical receiver antenna 8.
Time schedule controller 1: by internal pulses, two kinds of pulsed drive occurs to be formed, one is Laser Driven letter
Number, the persistent period is t1, and one is image intensifier drive signal, and the persistent period is t2.Can be adjusted by control sequential controller 1
The section numerical value of t1, t2 and time interval between the two.
Laser instrument 2: for general-purpose device, can be able to support accordingly to generate pulse for quasiconductor, solid, gas or liquid etc.
The laser instrument of laser.
Laser optics impulse generator 3: correspond to optical mode and generate laser light pulse, can be photoswitch, fuel
Piece or chopper etc..
Laser driver 4: correspond to the electrically driven of laser instrument 2, laser generation transmitting can be formed or directly form telecommunications
The light pulse emission of modulated of feeling the pulse class.
Image intensifier gate driver 5: for the controller of image intensifier 6, control the switch gate of image intensifier, gain
Adjustment, fluoroscopic brightness etc., it receives the control of external pulse control signal.
Image intensifier 6: for system photoelectric signal converter part, receive extraneous optical signal and change signal to fluorescent screen
Upper confession human eye viewing.
Optical transmitting antenna 7: for optical alignment system, the laser that laser instrument 2 is emitted carries out collimating to be launched, and is formed
The illumination region of system.
Optical receiver antenna 8: receive objective system for system, extraneous optical signal is collected on image intensifier 6.
During system work, send two by time schedule controller 1 and drive trigger to go to drive laser pulse emission and as increasing
Strong device gating receives, and both persistent period are t1 and t2 respectively, and time delay between the two is t3.When t1 reaches laser instrument
When 2, form a branch of space impulse illumination light.This illumination light spatially forms a narrow area with certain space stroke yardstick
Domain, when its illumination front scenery, is respectively radiated to target b1, b2 on track, on b3 ....The light beam of these laser lightings according to
Secondary return, forms the echo of b1 ', b2 ', b3 ' ... in space.The initial value t3 being set by time schedule controller 1, work as b1 ', b2 ',
When b3 ' ... reaches near optical receiver antenna 8, triggering drives t2 to reach image intensifier gate driver 5, when formation one continues
Between for t2 enabling signal.Now the fall target laser echo b1 ' within the t2 time period, b2 ', b3 ' ... all can effectively receive.
When b1 ', b2 ', b3 ' ... echo signal intensity are higher than the interference light of entrance system in the t2 time period, these target images
In fluorescence screen display, thus obtaining Bao Kuo b1, b2, b3 ... including big depth of field optical imagery, as shown in Figure 2.
In actually used period, b1, b2, b3 ... always can on different optical distances, and obtain laser lighting energy
Amount is different.After unified entrance system within the t2 time, the signal to noise ratio that its respective laser-bounce intensity is formed with veiling glare is
For system it can be found that the key of b1, b2, b3 ... target.By fluoroscopic feedback information it may be determined that this target signal to noise ratio
Situation, by suitable adjust time delay t3 scalable remote on Target Signal Strength, be suitable for normal eye-observation.
Claims (5)
1. realize the system of the big depth of field it is characterised in that described system includes under a kind of image intensifier burst pulse gating:
Time schedule controller (1), for occurring to form laser-driven signal and image intensifier drive signal by internal pulses；
Laser instrument (2), for generating pulse laser；
Laser optics impulse generator (3), generates laser light pulse for optical mode；
Laser driver (4), for electrically driven laser instrument (2)；
Image intensifier gate driver (5), for controlling image intensifier (6), receives the control of external pulse control signal simultaneously；
Image intensifier (6), for receive the external world optical signal and by signal change to fluorescent screen for human eye viewing；
Optical transmitting antenna (7), the laser for emitting laser instrument (2) carries out collimation transmitting, forms the illumination of system
Region；
Optical receiver antenna (8), for collecting in image intensifier (6) by extraneous optical signal.
2. under image intensifier burst pulse according to claim 1 gating, realize the system of the big depth of field it is characterised in that: described
The persistent period of laser-driven signal and image intensifier drive signal and time interval between the two all can pass through control sequential
Controller (1) is adjusting.
3. under image intensifier burst pulse according to claim 1 gating, realize the system of the big depth of field it is characterised in that: described
Laser optics impulse generator (3) is photoswitch or fuel sheet or chopper.
4. under image intensifier burst pulse according to claim 1 gating, realize the system of the big depth of field it is characterised in that: described
Laser driver (4) can form laser generation transmitting or the direct light pulse emission forming signal of telecommunication impulse modulation class.
5. under image intensifier burst pulse according to claim 1 gating, realize the system of the big depth of field it is characterised in that: described
The switch gate of image intensifier gate driver (5) control image intensifier (6), Gain tuning, screen intensity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610712150.4A CN106375657A (en) | 2016-08-23 | 2016-08-23 | System for realizing extended depth of field under narrow pulse gating of image intensifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610712150.4A CN106375657A (en) | 2016-08-23 | 2016-08-23 | System for realizing extended depth of field under narrow pulse gating of image intensifier |
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| CN106375657A true CN106375657A (en) | 2017-02-01 |
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| CN201610712150.4A Pending CN106375657A (en) | 2016-08-23 | 2016-08-23 | System for realizing extended depth of field under narrow pulse gating of image intensifier |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1580697A (en) * | 2004-05-18 | 2005-02-16 | 浙江大学 | Scanner-free imaging range finding method and its range finder |
| US20070058038A1 (en) * | 2004-02-04 | 2007-03-15 | Elbit Systems Ltd. | Gated imaging |
| CN101443911A (en) * | 2006-03-22 | 2009-05-27 | 艾可尼西斯公司 | Imager system |
| CN102508224A (en) * | 2011-11-18 | 2012-06-20 | 北京理工大学 | Device for improving imaging laser radar depth of field of multi-slit streak tube |
| CN104076574A (en) * | 2013-03-29 | 2014-10-01 | 中国科学院理化技术研究所 | Optical image enhancement device and method |
| CN105388485A (en) * | 2015-11-05 | 2016-03-09 | 中国工程物理研究院流体物理研究所 | Multi-pulse range gated imaging system and method |
| CN205210308U (en) * | 2015-11-05 | 2016-05-04 | 中国工程物理研究院流体物理研究所 | Multiple -pulse range gate imaging system |
| CN205945976U (en) * | 2016-08-23 | 2017-02-08 | 江苏北方湖光光电有限公司 | System for realize large -depth -of -field under image intensifier burst pulse gating |
-
2016
- 2016-08-23 CN CN201610712150.4A patent/CN106375657A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070058038A1 (en) * | 2004-02-04 | 2007-03-15 | Elbit Systems Ltd. | Gated imaging |
| CN1580697A (en) * | 2004-05-18 | 2005-02-16 | 浙江大学 | Scanner-free imaging range finding method and its range finder |
| CN101443911A (en) * | 2006-03-22 | 2009-05-27 | 艾可尼西斯公司 | Imager system |
| CN102508224A (en) * | 2011-11-18 | 2012-06-20 | 北京理工大学 | Device for improving imaging laser radar depth of field of multi-slit streak tube |
| CN104076574A (en) * | 2013-03-29 | 2014-10-01 | 中国科学院理化技术研究所 | Optical image enhancement device and method |
| CN105388485A (en) * | 2015-11-05 | 2016-03-09 | 中国工程物理研究院流体物理研究所 | Multi-pulse range gated imaging system and method |
| CN205210308U (en) * | 2015-11-05 | 2016-05-04 | 中国工程物理研究院流体物理研究所 | Multiple -pulse range gate imaging system |
| CN205945976U (en) * | 2016-08-23 | 2017-02-08 | 江苏北方湖光光电有限公司 | System for realize large -depth -of -field under image intensifier burst pulse gating |
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Application publication date: 20170201 |