CN201765378U - Night vision instrument with range finding function - Google Patents
Night vision instrument with range finding function Download PDFInfo
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- CN201765378U CN201765378U CN2010202969873U CN201020296987U CN201765378U CN 201765378 U CN201765378 U CN 201765378U CN 2010202969873 U CN2010202969873 U CN 2010202969873U CN 201020296987 U CN201020296987 U CN 201020296987U CN 201765378 U CN201765378 U CN 201765378U
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Abstract
The utility model relates to a night vision instrument with a range finding function, which belongs to the field of monitoring devices. The utility model adopts the technical scheme that the night vision instrument comprises a pulse laser and an ICCD camera provided with a strobing gate, wherein the ICCD camera can achieve the purpose of range-gated imaging; and a range-gated synchronous controller is arranged between the pulse laser and the ICCD camera and enables the pulse of the pulse laser to be properly matched with the ICCD camera in the time sequence, the useful signals after background radiation caused by back scattering at different distances and the useful signals after target reflection are separated according to the time sequence, so that the useful signals reflected from the detected target exactly reach to the camera within the time of strobing work of the camera and are imaged. The utility model has the benefits that the distance between the camera and the target is automatically measured by adopting the pulse laser and the ICCD camera with the range-gated imaging function, and the night vision instrument has more effective monitoring effect.
Description
Technical field
The utility model relates to a kind of watch-dog, relates in particular to a kind of night vision device with distance measurement function.
Background technology
Advantages such as laser night-vision device has low in energy consumption, and operating distance is far away, as emerging night vision technology in the market widespread use.General laser night-vision device adopts CW-laser illuminator, and laser beam enters the CCD camera behind target reflection, and target obtains imaging.This night vision device only can be found target but can't detect target range.
Summary of the invention
The utility model is at the existing in prior technology shortcoming, and a kind of technical scheme that can have the night vision device of distance measurement function is provided, this scheme adopts the automatic measurement of distance between pulsed laser and ICCD camera realization video camera with range gating imaging function and the target.
The utility model is realized by following technical measures: a kind of night vision device with distance measurement function, and it comprises pulsed laser and has the ICCD camera of storbing gate that described ICCD camera can be realized the range gating imaging; Be provided with the range gating isochronous controller between described pulsed laser and the ICCD camera, described range gating isochronous controller can make the pulse of pulsed laser and ICCD video camera correctly cooperate on sequential, separate the useful signal that background radiation that the back scattering on the different distance causes and target reflection return with the priority of time, make from the useful signal of detected target reflected back and just in the time of video camera gating work, arrive video camera and imaging.
Concrete characteristics of the present utility model also have, and above-mentioned range gating isochronous controller is a synchronization control circuit, and synchronization control circuit comprises timing circuit, and timing circuit can make the laser radiation of camera shutter unlatching and pulsed laser synchronous.
The beneficial effect of this programme can learn that employing this programme can obtain the distance between night vision device and the target automatically according to the narration to such scheme, makes that monitoring is more effective.
Description of drawings
Fig. 1 is an imaging schematic diagram of the present utility model.
The timing diagram of the ideal distance gating imaging among Fig. 2 when 1200m place target observed.
Embodiment
For clearly demonstrating the technical characterstic of this programme,, this programme is set forth below by an embodiment.
A kind of night vision device with distance measurement function, as shown in Figure 1, it comprises pulsed laser and has the ICCD camera of storbing gate that described ICCD camera can be realized the range gating imaging; Be provided with the range gating isochronous controller between described pulsed laser and the ICCD camera, described range gating isochronous controller can make the pulse of pulsed laser and ICCD video camera correctly cooperate on sequential, separate the useful signal that background radiation that the back scattering on the different distance causes and target reflection return with the priority of time, make from the useful signal of detected target reflected back and just in the time of video camera gating work, arrive video camera and imaging.The range gating isochronous controller is a synchronization control circuit, and synchronization control circuit comprises timing circuit, and timing circuit can make the laser radiation of camera shutter unlatching and pulsed laser synchronous.
Image-forming principle of the present utility model is: the short pulse that pulsed laser emission is very strong, pulse laser is transferred on the target, and target is shone, and turns back to the ICCD camera by the laser of target reflection.When laser pulse was among the round figure, ICCD camera storbing gate was in closed condition, has blocked the rear orientation light that the atmosphere suspended particulates cause like this.When target reflection laser arrived the ICCD camera, storbing gate was opened, and allowed the reflected light from target enter the ICCD video camera.It is consistent with laser pulse that the ICCD video camera is opened the duration, and it is main relevant with target peripheral reflection light to form target image like this, has improved signal noise ratio (snr) of image greatly.Produce storbing gate trunon delay time τ according to pulse laser equally and can calculate target range s=τ * 3 * 10
8/ 2m.
Storbing gate trunon delay time τ is the turnaround time that laser beam arrives target, under the target range condition of unknown, the storbing gate trunon delay time is that time delay of strobe pulse is with certain interval scan, according to the locking delayed time of Image Definition.And computed range is added in the video with real-time display-object distance.Image Definition has multiple mode, and this programme adopts image outline extraction carrying out brightness summing mode.
Can the range gating isochronous controller be one of key of range gating laser imaging system, be directly connected to the gating image that obtain target.
The range gating isochronous controller mainly is that the pulse of laser instrument and ICCD video camera are correctly cooperated on sequential, separate the useful signal that background radiation that the back scattering on the different distance causes and target reflection return with the priority of time, make from the useful signal of detected target reflected back and just in the time of video camera gating work, arrive video camera and imaging.Therefore isochronous controller is the key that realizes range gating.
Isochronous controller can realize that synchronization control circuit is used for determining bright pulse and the sequential between the ICCD video camera strobe pulse and the corresponding time-delay relation of pulsed laser by the design synchronization control circuit.Synchronization control circuit is mainly by forming the synchronous timing circuit of shutter opening and laser radiation, and timing depends on that the research that laser pulse is transferred to the gating of maritime search and rescue target again imaging technique on the target reflexes to the needed time of receiver.Provided the timing diagram of the ideal distance gating imaging when 1200m place target observed among Fig. 2.Waveform A is laser pulse illumination output among the figure: waveform B is the variation of the laser illuminator pulse back scattering radiation that receives of receiver; To be laser pulse turn back to reflected radiation on the receiver by target to waveform C; Waveform D is the strobe pulse of receiver; τ is the time delay of delayed-pulse generator; t
wGate width for receiver.Because target range is 1220m, the laser beam turnaround time is about 8 μ s, so strobe pulse should send time delay 8 μ s according to bright laser pulse.Waveform D is desirable strobe pulse among the figure, and actual range gating synchronization control circuit is exactly to make the time-delay of strobe pulse accurate as much as possible, so just can obtain the desirable gating image of target.And because the velocity of propagation of laser is 3 * 10
8M/s, thus the time delay of strobe pulse be microsecond, even nanosecond order, this is a big difficult point of range gating synchro control.
The utility model can pass through or adopt existing techniques in realizing without the technical characterictic of describing; do not repeat them here; certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example; variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection domain of the present utility model.
Claims (2)
1. the night vision device with distance measurement function is characterized in that, it comprises pulsed laser and have the ICCD camera of storbing gate that described ICCD camera can be realized the range gating imaging; Be provided with the range gating isochronous controller between described pulsed laser and the ICCD camera, described range gating isochronous controller can make the pulse of pulsed laser and ICCD video camera correctly cooperate on sequential, separate the useful signal that background radiation that the back scattering on the different distance causes and target reflection return with the priority of time, make from the useful signal of detected target reflected back and just in the time of video camera gating work, arrive video camera and imaging.
2. the night vision device with distance measurement function according to claim 1, it is characterized in that, described range gating isochronous controller is a synchronization control circuit, and synchronization control circuit comprises timing circuit, and timing circuit can make the laser radiation of camera shutter unlatching and pulsed laser synchronous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202969873U CN201765378U (en) | 2010-08-19 | 2010-08-19 | Night vision instrument with range finding function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202969873U CN201765378U (en) | 2010-08-19 | 2010-08-19 | Night vision instrument with range finding function |
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| CN201765378U true CN201765378U (en) | 2011-03-16 |
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| CN2010202969873U Expired - Fee Related CN201765378U (en) | 2010-08-19 | 2010-08-19 | Night vision instrument with range finding function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963696A (en) * | 2010-08-19 | 2011-02-02 | 山东神戎电子股份有限公司 | Night-vision device with ranging function |
| CN102623883A (en) * | 2012-03-29 | 2012-08-01 | 中国科学院光电技术研究所 | Range gating synchronous control device based on pulse laser scattering light synchronization |
| CN103792874A (en) * | 2014-01-22 | 2014-05-14 | 中国科学院长春光学精密机械与物理研究所 | Embedded range gating main control system for laser active imaging |
| CN104470757A (en) * | 2012-07-09 | 2015-03-25 | 布莱特瓦维森有限公司 | Stereo gated imaging system and method |
| CN106094195A (en) * | 2016-06-21 | 2016-11-09 | 河南平原光电有限公司 | A kind of possess window see take aim at, the hand-held passive binoculars of camera function |
-
2010
- 2010-08-19 CN CN2010202969873U patent/CN201765378U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963696A (en) * | 2010-08-19 | 2011-02-02 | 山东神戎电子股份有限公司 | Night-vision device with ranging function |
| CN102623883A (en) * | 2012-03-29 | 2012-08-01 | 中国科学院光电技术研究所 | Range gating synchronous control device based on pulse laser scattering light synchronization |
| CN102623883B (en) * | 2012-03-29 | 2013-09-25 | 中国科学院光电技术研究所 | Range gating synchronous control device based on pulse laser scattering light synchronization |
| CN104470757A (en) * | 2012-07-09 | 2015-03-25 | 布莱特瓦维森有限公司 | Stereo gated imaging system and method |
| CN104470757B (en) * | 2012-07-09 | 2017-05-17 | 布莱特瓦维森有限公司 | Stereo gated imaging system and method |
| US10390004B2 (en) | 2012-07-09 | 2019-08-20 | Brightway Vision Ltd. | Stereo gated imaging system and method |
| CN103792874A (en) * | 2014-01-22 | 2014-05-14 | 中国科学院长春光学精密机械与物理研究所 | Embedded range gating main control system for laser active imaging |
| CN106094195A (en) * | 2016-06-21 | 2016-11-09 | 河南平原光电有限公司 | A kind of possess window see take aim at, the hand-held passive binoculars of camera function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110316 Termination date: 20150819 |
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| EXPY | Termination of patent right or utility model |