CA2516070A1 - Laser gated camera imaging system and method - Google Patents
Laser gated camera imaging system and method Download PDFInfo
- Publication number
- CA2516070A1 CA2516070A1 CA002516070A CA2516070A CA2516070A1 CA 2516070 A1 CA2516070 A1 CA 2516070A1 CA 002516070 A CA002516070 A CA 002516070A CA 2516070 A CA2516070 A CA 2516070A CA 2516070 A1 CA2516070 A1 CA 2516070A1
- Authority
- CA
- Canada
- Prior art keywords
- laser
- camera
- range
- gated
- camera assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/86—Combinations of lidar systems with systems other than lidar, radar or sonar, e.g. with direction finders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
- G01S17/18—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves wherein range gates are used
Abstract
A gated camera imaging system and method, utilizing a laser device for generating a beam of long duration laser pulses toward a target. A camera receives the energy of light reflexes of the pulses reflected from the target.
The camera gating is synchronized to be set OFF for at least the duration of time it takes the laser device to produce a laser pulse in its substantial entirety, including an end of the laser pulse, in addition to the time it takes the laser pulse to complete traversing a zone proximate to the system and back to the camera, and set ON for an ON time duration thereafter until the laser pulse reflects back from the target and is received in the camera.
The laser pulse width substantially corresponds to at least the ON time duration. Preferably, the laser device includes a Diode Laser Array (DLA).
The camera gating is synchronized to be set OFF for at least the duration of time it takes the laser device to produce a laser pulse in its substantial entirety, including an end of the laser pulse, in addition to the time it takes the laser pulse to complete traversing a zone proximate to the system and back to the camera, and set ON for an ON time duration thereafter until the laser pulse reflects back from the target and is received in the camera.
The laser pulse width substantially corresponds to at least the ON time duration. Preferably, the laser device includes a Diode Laser Array (DLA).
Claims (24)
1. A laser imaging system with a gated camera, comprising:
a laser device, for generating a beam of laser energy in the form of pulses toward a target; and a gated camera assembly for receiving the energy of light reflexes of said pulses reflected from said target;
said system is characterized in that:
the gating of said camera assembly is synchronized to set said camera assembly to an OFF state for at least the pulse width time it takes said laser device to produce a laser pulse of said pulses, in addition to the extra time it takes the substantial entirety of said Laser pulse to complete traversing a minimal range (Lm) from said laser device, and reflecting back to said camera assembly, and set said camera assembly to an ON state for an ON time duration thereafter until the substantial entirety of said laser pulse reflects back from a maximal range (Lt) from said laser device, and is received in said camera assembly;
said target being located between said minimal range (Lm) and said maximal range (Lt); and said pulses comprise a long pulse width in the microsecond range or longer, substantially corresponding to at least said ON time duration.
a laser device, for generating a beam of laser energy in the form of pulses toward a target; and a gated camera assembly for receiving the energy of light reflexes of said pulses reflected from said target;
said system is characterized in that:
the gating of said camera assembly is synchronized to set said camera assembly to an OFF state for at least the pulse width time it takes said laser device to produce a laser pulse of said pulses, in addition to the extra time it takes the substantial entirety of said Laser pulse to complete traversing a minimal range (Lm) from said laser device, and reflecting back to said camera assembly, and set said camera assembly to an ON state for an ON time duration thereafter until the substantial entirety of said laser pulse reflects back from a maximal range (Lt) from said laser device, and is received in said camera assembly;
said target being located between said minimal range (Lm) and said maximal range (Lt); and said pulses comprise a long pulse width in the microsecond range or longer, substantially corresponding to at least said ON time duration.
2. The system according to claim 1, wherein said extra time is given by 2.cndot.Lm/c, where c is the speed of light constant.
3. The system according to claim 1, wherein said minimal range (Lm) corresponds to a range adjacent to said system in which inclement conditions may be present.
4. The system according to claim 1, wherein said ON time duration is given by 2.cndot.(Lt-Lm)/c, where c is the speed of light constant.
5. The system according to claim 1, wherein said pulse width substantially corresponds to a time duration given by 2.cndot.(Lt-Lm)/c, where c is the speed of light constant.
6. The system according to claim 1, wherein said laser device comprises a Diode Laser Array (DLA).
7. The system according to claim 6, wherein said DLA provides said beam of laser energy in the range selected from the near IR light spectrum, and the blue - green range of the visible light spectrum.
8. The system according to claim 1, wherein said camera assembly comprises at least one selected from the list consisting of: a Charge Coupled Device (CCD), a Gated Intensified Charge Injection Device (GICID), a Gated Intensified CCD (GICCD), a Gated image Intensifier, and a Gated Intensified Active Pixel Sensor (GIAPS).
9. The system according to claim 1, further comprising an optical fiber for transferring said beam of laser energy from said laser device through said optical fiber.
10. The system according to claim 9, further comprising a gimbal for stabilizing, in a packaged module, said camera assembly, an optical fiber exit of said optical fiber, optical components for receiving said light reflexes and directing them to said camera assembly, and optical components for transmitting said beam of laser energy from said optical fiber exit toward said target.
11. The system according to claim 10, wherein said gimbal comprises a gyro feedback.
12. The system according to claim 1, further comprising an image-process stabilizer.
13. The system in according to claim 9, further comprising a support unit for supporting and providing height and rotations! adjustments to said camera assembly and an optical fiber exit of said optical fiber, in a packaged module.
14. The system according to claim 1, further comprising at least one filter, for spectral or spatial filtering.
15. The system according to claim 1, further comprising an optical multiplier for enlarging the image of said target.
16. The system according to claim 1, further comprising a coupler assembly for coupling the optical axis of said laser device with the optical axis of said camera assembly, comprising transmit/receive optics for receiving said reflexes and directing them to said camera assembly, and for transmitting said laser pulses toward said target.
17. The system according to claim 16, wherein said coupler assembly comprises:
a collimator for collimating said beam of laser energy;
a mirror means for deflecting and converging said beam of laser energy; and an optical coupler comprising a mirror splitter for coupling said optical axis of said beam of laser energy with said optical axis of said camera assembly.
a collimator for collimating said beam of laser energy;
a mirror means for deflecting and converging said beam of laser energy; and an optical coupler comprising a mirror splitter for coupling said optical axis of said beam of laser energy with said optical axis of said camera assembly.
18. The system according to claim 1, wherein the optical axis of said laser device is substantially parallel to the optical axis of said camera assembly.
19. A method for laser imaging with a gated camera, comprising the procedures of:
generating, by a laser device, a laser beam in the form of pulses toward a target; and receiving the energy of light reflexes of said pulses reflected from said target by a gated camera;
said method being characterised in that:
said procedure of receiving comprises gating said gated camera by setting said gated camera to an OFF state for at least the initial time it takes said laser device to produce a laser pulse of said pulses, in addition to the additional time it takes the substantial entirety of said laser pulse to complete traversing a minimal range (Lm) from said laser device and reflecting back to said gated camera, and setting said gated camera to an ON state for an ON time duration thereafter until the substantial entirety of said laser pulse reflects back from a maximal range (Lt) from said laser device and is received in said gated camera;
said target being located between said minimal range (Lm) and said maximal range (Lt); and said pulses comprise a long pulse width in the microsecond range or longer, substantially corresponding to at least said ON time duration.
generating, by a laser device, a laser beam in the form of pulses toward a target; and receiving the energy of light reflexes of said pulses reflected from said target by a gated camera;
said method being characterised in that:
said procedure of receiving comprises gating said gated camera by setting said gated camera to an OFF state for at least the initial time it takes said laser device to produce a laser pulse of said pulses, in addition to the additional time it takes the substantial entirety of said laser pulse to complete traversing a minimal range (Lm) from said laser device and reflecting back to said gated camera, and setting said gated camera to an ON state for an ON time duration thereafter until the substantial entirety of said laser pulse reflects back from a maximal range (Lt) from said laser device and is received in said gated camera;
said target being located between said minimal range (Lm) and said maximal range (Lt); and said pulses comprise a long pulse width in the microsecond range or longer, substantially corresponding to at least said ON time duration.
20. The method according to claim 119, wherein said additional time is given by 2.cndot.Lm/c, where c is the velocity of light.
21. The method according to claim 19, wherein said minimal range (Lm) corresponds to a range adjacent to said laser device and gated camera in which inclement conditions may be present.
22. The method according to claim 19, wherein said ON time duration is given by 2.cndot.(Lt-Lm)/c, where c is the speed of light constant.
23. The method according to claim 19, wherein said pulse width substantially corresponds to a time duration given by 2.cndot.(Lt-Lm)/c, where c is the speed of light constant.
24. The method according to claim 19, wherein said procedure of generating comprises generating said laser beam by a Diode Laser Array (DLA).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL15447903A IL154479A0 (en) | 2003-02-16 | 2003-02-16 | Laser gated intensified ccd |
| IL154479 | 2003-02-16 | ||
| PCT/IL2004/000112 WO2004072678A1 (en) | 2003-02-16 | 2004-02-04 | Laser gated camera imaging system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2516070A1 true CA2516070A1 (en) | 2004-08-26 |
| CA2516070C CA2516070C (en) | 2012-05-29 |
Family
ID=30012013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2516070A Expired - Lifetime CA2516070C (en) | 2003-02-16 | 2004-02-04 | Laser gated camera imaging system and method |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7379164B2 (en) |
| EP (1) | EP1595162B1 (en) |
| CA (1) | CA2516070C (en) |
| ES (1) | ES2459748T3 (en) |
| IL (2) | IL154479A0 (en) |
| WO (1) | WO2004072678A1 (en) |
Families Citing this family (33)
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|---|---|---|---|---|
| CA2554955C (en) | 2004-02-04 | 2010-09-14 | Elbit Systems Ltd. | Gated imaging |
| GB2424269A (en) * | 2004-04-01 | 2006-09-20 | Robert Michael Lipman | Control apparatus |
| WO2006090356A1 (en) * | 2005-02-23 | 2006-08-31 | Elbit Systems Ltd. | Add-on laser gated imaging device for associating with an optical assembly |
| US20070045545A1 (en) * | 2005-08-26 | 2007-03-01 | Light David O | Hyperspectral sensor using tunable filter |
| CN100393105C (en) * | 2005-12-05 | 2008-06-04 | 中国科学院武汉物理与数学研究所 | Apparatus for synchronizing camera with supershort pulse laser lighting |
| IL177304A0 (en) * | 2006-08-06 | 2007-07-04 | Raphael E Levy | A method and system for designating a target and generating target related action |
| TW200818875A (en) * | 2006-10-03 | 2008-04-16 | Appro Technology Inc | Monitoring camera and monitoring system using with function of laser positioning |
| US7642929B1 (en) * | 2007-04-19 | 2010-01-05 | The United States Of America As Represented By The Secretary Of The Air Force | Helicopter brown-out landing |
| WO2011107987A1 (en) | 2010-03-02 | 2011-09-09 | Elbit Systems Ltd. | Image gated camera for detecting objects in a marine environment |
| DE102011010334B4 (en) * | 2011-02-04 | 2014-08-28 | Eads Deutschland Gmbh | Camera system and method for observing objects at a great distance, in particular for monitoring target objects at night, mist, dust or rain |
| TWM411744U (en) * | 2011-04-12 | 2011-09-11 | Digilife Technologies Co Ltd | Wireless image-capturing device |
| EP2634597B1 (en) * | 2012-03-02 | 2016-06-22 | Airbus Defence and Space GmbH | Method for detecting obstacles in restricted visibility |
| US10354448B1 (en) | 2013-03-15 | 2019-07-16 | Lockheed Martin Corporation | Detection of optical components in a scene |
| US8890944B1 (en) * | 2013-05-16 | 2014-11-18 | Gunbusters, LLC | Firearms pulverizer system and method |
| IL227265A0 (en) | 2013-06-30 | 2013-12-31 | Brightway Vision Ltd | Smart camera flash |
| DK2866047T3 (en) * | 2013-10-23 | 2021-03-29 | Ladar Ltd | DETECTION SYSTEM FOR DETECTING AN OBJECT ON A WATER SURFACE |
| CN103905691B (en) * | 2014-03-27 | 2015-07-15 | 深圳市保千里电子有限公司 | Method for obtaining sharp image through penetration through rain, snow and fog, and photographing system |
| IL233356A (en) * | 2014-06-24 | 2015-10-29 | Brightway Vision Ltd | Gated sensor based imaging system with minimized delay time between sensor exposures |
| US10031229B1 (en) | 2014-12-15 | 2018-07-24 | Rockwell Collins, Inc. | Object designator system and method |
| US10249025B2 (en) | 2015-07-06 | 2019-04-02 | The United States Of America As Represented By The Secretary Of The Navy | Atmospheric channel characterization system and method using target image information |
| CN105242281B (en) * | 2015-09-01 | 2017-10-20 | 西安交通大学 | Three-dimensional laser imaging system and method based on APD array |
| CN105223584B (en) * | 2015-11-05 | 2017-11-21 | 中国工程物理研究院流体物理研究所 | A kind of Range-gated Imager system and method based on back scattering illumination |
| CN105549029B (en) * | 2016-01-19 | 2018-11-27 | 中国工程物理研究院流体物理研究所 | A kind of illuminated scan stacking image system and method |
| JP2019090625A (en) * | 2017-11-10 | 2019-06-13 | ミツミ電機株式会社 | Distance measuring camera |
| CN109901133A (en) * | 2017-12-07 | 2019-06-18 | 鸿富锦精密工业（深圳）有限公司 | Laser radar apparatus |
| WO2019164959A1 (en) | 2018-02-20 | 2019-08-29 | The Charles Stark Draper Laboratory, Inc. | Time-resolved contrast imaging for lidar |
| CN108897004B (en) * | 2018-06-28 | 2020-11-13 | 中国人民解放军91977部队 | Laser gating imaging search and rescue device |
| US11722778B2 (en) * | 2018-10-08 | 2023-08-08 | Florida Atlantic University Board Of Trustees | Underwater imaging system |
| TWI755234B (en) * | 2020-01-15 | 2022-02-11 | 承奕科技股份有限公司 | Smart long-distance infrared fill light group |
| CN112040116B (en) * | 2020-07-20 | 2022-07-29 | 清华大学 | Non-vision field dynamic imaging method and device based on aperture-division gating camera |
| WO2022235851A1 (en) * | 2021-05-04 | 2022-11-10 | The Trustees Of Dartmouth College | Gated camera and gated image acquisition method |
| CN113484874B (en) * | 2021-06-25 | 2023-10-17 | 山东航天电子技术研究所 | Active imaging device and imaging method for realizing full detection of flight time domain |
| WO2023152422A1 (en) | 2022-02-11 | 2023-08-17 | Teknologian Tutkimuskeskus Vtt Oy | Light-emitting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4920412A (en) * | 1988-12-22 | 1990-04-24 | Sperry Marine Inc. | Atmospheric obscurant penetrating target observation system with range gating |
| US5303084A (en) * | 1991-08-27 | 1994-04-12 | Kaman Aerospace Corporation | Laser light beam homogenizer and imaging lidar system incorporating same |
| US5408541A (en) * | 1993-01-05 | 1995-04-18 | Lockheed Corporation | Method and system for recognizing targets at long ranges |
| GB2308763B (en) | 1995-12-29 | 1999-12-22 | Barr & Stroud Ltd | Laser range finders |
| US6836285B1 (en) * | 1999-09-03 | 2004-12-28 | Arete Associates | Lidar with streak-tube imaging,including hazard detection in marine applications; related optics |
-
2003
- 2003-02-16 IL IL15447903A patent/IL154479A0/en unknown
-
2004
- 2004-02-04 EP EP04708004.9A patent/EP1595162B1/en not_active Expired - Lifetime
- 2004-02-04 US US10/545,765 patent/US7379164B2/en not_active Expired - Lifetime
- 2004-02-04 WO PCT/IL2004/000112 patent/WO2004072678A1/en active Application Filing
- 2004-02-04 ES ES04708004.9T patent/ES2459748T3/en not_active Expired - Lifetime
- 2004-02-04 CA CA2516070A patent/CA2516070C/en not_active Expired - Lifetime
-
2005
- 2005-08-04 IL IL170098A patent/IL170098A/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| ES2459748T3 (en) | 2014-05-12 |
| EP1595162B1 (en) | 2014-04-02 |
| WO2004072678B1 (en) | 2004-09-16 |
| IL154479A0 (en) | 2003-09-17 |
| IL170098A (en) | 2010-04-15 |
| CA2516070C (en) | 2012-05-29 |
| US20060250497A1 (en) | 2006-11-09 |
| US7379164B2 (en) | 2008-05-27 |
| EP1595162A1 (en) | 2005-11-16 |
| WO2004072678A1 (en) | 2004-08-26 |
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Legal Events
| Date | Code | Title | Description |
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| EEER | Examination request |