CN103792666B - Laser night vision is auxiliary drives laser illuminator - Google Patents
Laser night vision is auxiliary drives laser illuminator Download PDFInfo
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- CN103792666B CN103792666B CN201410053862.0A CN201410053862A CN103792666B CN 103792666 B CN103792666 B CN 103792666B CN 201410053862 A CN201410053862 A CN 201410053862A CN 103792666 B CN103792666 B CN 103792666B
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Abstract
The invention discloses a kind of laser night vision auxiliary driving laser illuminator, comprise laser instrument and the camera lens being assemblied in laser emitting window, it is characterized in that, laser emitting laser level direction is slow axis, vertical direction is fast axle, correspondingly, camera lens is from rear to being front furnished with the fast axle lens combination for fast axle compression shaping, the slow axis lens combination for slow axis divergence shaping, rising angle control lens and the even smooth plain film of heterogeneity, thus the secondary light beam that the main beam of generation long drive and close-range shot are dispersed; Fast axle lens combination and rising angle control lens and are furnished with the driving mechanism driven at fore-and-aft direction separately.Be applicable near the ground and long distance illumination according to the present invention simultaneously.
Description
Technical field
The present invention relates to that a kind of laser night vision is auxiliary drives laser illuminator, specifically relate to laser night vision and assist laser illuminator in driving field.
Background technology
Existing night vision vehicle-mounted DAS (Driver Assistant System) imaging device is mainly infrared or low-light-level imaging associated image two kinds.Infrared system is passive heat imaging, is to detect temperature, according to different temperatures to the system of Scenery Imaging, can realize not carrying out by opposite the imaging that car light affects night.The shortcomings such as it is not high enough that thermal imagery assists driving to there is resolution, and the pothole axis information little to temperature difference is inadequate, expensive.
Low-light-level imaging equipment, can when there being faint light to road surface high resolving power blur-free imaging at night, but run into when there is high light on opposite can cannot imaging because of luminance saturation, thus it is ineffective, also can lose the function of blur-free imaging under lower than the condition of its low-light (level) because of insufficient light, service condition is limited larger simultaneously.
The near-infrared laser just can responded to by common camera throws light on the laser night vision DAS (Driver Assistant System) made, in conjunction with the monochromaticity of laser, coordinate the process such as visible ray filters, near infrared light is anti-reflection, can realize the suppression of car light light and the blur-free imaging to direct of travel surface conditions at night of heading on.
The application of vehicle-mounted auxiliary driving laser night vision is different from the laser night vision lighting demand in other application, such as requirement visual field, monitoring laser night vision field inner laser distribution uniformity as far as possible, to ensure monitored picture imaging clearly.And vehicle-mounted laser throws light on because imaging viewing field scope is large, in visual field, existing scenery closely as within 5 meters also has remote as up to a hundred meters scenery, if therefore adopt common luminaire to make luminous energy in whole visual field consistent, owing to will be imaged equipment apart from the light closely returned, closer object senses that brightness is higher, regulating power due to imaging device picture is not unlimited, and therefore reflective relatively closely would not being imaged of remote scenery shows.
In some applications, adopt the structure that multisystem coordinates, two systems work according to the mode of oneself separately, and not only cost is high, and shared by configuration structure, space is larger.
If be configured to single laser illuminator, produce as Chinese patent literature CN103186015A, it is by configuring the large laser illuminator of focusing range, and mate distance-measuring equipment simultaneously, utilize range finding and mating of focusing to carry out distance to throw light on and take into account, but this configuration structure exactly can only recent photograph or photograph far away in the same moment, it is much the same that the laser camera being shot that cannot realize the reflection of far and near distance target responds to high brightness value.
Accept multisystem configuration structure, as Chinese patent literature CN203120031U discloses a kind of IR night vision apparatus, the quantity of the infrared laser of its configuration is at least two, in described infrared laser, the eyeglass of the camera lens of an infrared laser is had at least to be high transmission rate level crossing, the eyeglass of the camera lens of an infrared laser is had at least to be convex lens, can carry out growing distance at the infrared laser by having convex lens eyeglass to irradiate to realize distant surveillance, while monitoring, the divergence of laser beam is increased substantially by the eyeglass of the infrared laser with high transmission rate level crossing eyeglass, increase the close-ups of infrared viewing device, monitor wide-angle, realize remote little wide angle viewing simultaneously, supervision and closely large wide angle viewing, the object monitored.This structure can be good at the object realizing with duing attention to both short and long-range targets, but owing to being configured with many moneys laser instrument, make its holistic cost higher, and shared by one-piece construction, installing space is bigger than normal.Meanwhile, known, drive illumination even if be not used in, and for outdoor monitoring, many illuminator systems must configure as camera lens cleaning system, such as rain brush etc. simultaneously, overall cost is difficult to turn down.
Summary of the invention
The object of the present invention is to provide a kind of laser illuminator of assisting driving for laser night vision, by to laser shaping process, make it be applicable near the ground and long distance illumination simultaneously, and apply for the auxiliary driving laser lighting of video camera imaging to lighting source and irradiated object a cost laser luminaire for this application carried out.
The present invention is by the following technical solutions:
Comprise laser instrument and the camera lens being assemblied in laser emitting window, it is characterized in that, laser emitting laser level direction is slow axis, vertical direction is fast axle, correspondingly, camera lens from rear to being front furnished with the fast axle lens combination for fast axle compression shaping, the slow axis lens combination for slow axis divergence shaping, the rising angle that controls for main beam rising angle control lens, the even smooth plain film of heterogeneity for generation of asymmetric outgoing beam, thus produces the secondary light beam that the main beam of long drive and close-range shot disperse; Fast axle lens combination and rising angle control lens and are furnished with the governor motion regulated at fore-and-aft direction separately.
As can be seen from such scheme, according to the present invention, adopt another technology path, only use a laser instrument, utilize the characteristic that the even smooth plain film of heterogeneity is inconsistent to the shaping dispersion angle of main beam, produce the main beam that angular is less, the remote object of main irradiation more than 50 meters, secondary beam divergence angle is large, and level time light beam is the angle that dispersion angle that observation requirements then designs can observe road closely surrounding enviroment, thus better adapts to the demand of vehicle-mounted auxiliary driving.
In the structure selected further, above-mentioned laser night vision is auxiliary drives laser illuminator, described camera lens also comprises the rising angle be positioned on front side of slow axis lens combination and controls lens, with compression shaping main beam and time light beam, by further shaping, main beam and time light beam is made to be in available preferably scope.
Preferably, described camera lens also comprises the even smooth plain film of heterogeneity be positioned on front side of rising angle control lens, under making main beam ensure to be greater than the prerequisite of the transmitance of 80%, according to predetermined vertical level angle outgoing, secondary light beam to be greater than the angle of divergence outgoing of 50 degree of dispersion angles, can have better suitability to visual field scene brightness while guarantee light successively decreases successively from center to edge.
Further, the even smooth plain film of described heterogeneity comprises the even photo structure of asymmetrical gradual change, forms the secondary light beam that gradual change weakens, selectively distinguishes irradiation to the article of the different distributions in visual field, can obtain imaging clearly relatively.
The even smooth plain film of described heterogeneity is upper and lower composite structure, and wherein upper part is to main beam transmission, and lower part is to main beam scattering, thus described transmissive portion is thrown light on to distant object, and scattered portion irradiates close-in target.Level time light beam is the angle that dispersion angle that observation requirements then designs can observe road both sides very closely surrounding enviroment, the light beam departing from overcentre part does not have too much influence to environment to driving, does like this and can reduce the follow-up requirement to imaging device on the whole.
Preferably, described laser instrument is narrow linewidth semiconductor laser, and it is furnished with radiator structure, improves the usability of equipment.
Further, in order to simplify structure, described radiator structure comprises the heat radiator of radiator fan and the coupling radiator fan aligning the assembling of laser instrument side.
Preferably, described laser instrument holds in the rectangular parallelepiped cavity be made up of heat radiator, and rectangular parallelepiped cavity one side has the groove holding radiator fan, thus radiator fan forms embedded-type heat-dissipating fan, compact overall structure, convenient installation, and less on the impact of installed object appearance.
Described laser instrument is narrow linewidth laser, thus coordinates the imaging device with the optical filtering of same band can well realize suppressing the high light of the car light that heads on.Thus effectively the vehicle-mounted DAS (Driver Assistant System) of solution general visible has head-on car light picture dazzle, entirety is turned white, and cannot observe the problem of front road conditions.
Accompanying drawing explanation
Fig. 1 a is according to the Light distribation figure in vertical plane of the present invention.
Fig. 1 b is according to the Light distribation figure in surface level of the present invention.
Fig. 2 assists the contour structures schematic diagram driving laser illuminator according to laser night vision of the present invention.
Fig. 3 is the A-A cut-open view of Fig. 2.
Fig. 4 adopts the auxiliary effect contrast figure driven before and after sharp candling, is illustrated as photo, has gray scale, but do not affect diagram content identification.
Fig. 5 is the effect contrast figure before and after high light suppresses, and is illustrated as photo, has gray scale, but do not affect diagram content identification.
Fig. 6 is the structure principle chart of the even mating plate of heterogeneity.
In figure: 1, feed circuit plate, 2, embed radiator fan, 3, main fixing and heat abstractor, 4, the micro-cylindrical mirror mirror holder of fast axle shaping, 5, rising angle controls lens mirror holder, 6, coaxial fixed lens barrel, 7, the even smooth plain film trim ring of heterogeneity, 8, rising angle controls lens trim ring, 9, slow axis shaping cylindrical mirror mirror holder, 10, the micro-cylindrical mirror of fast axle shaping, 11, semiconductor laser, 12, the micro-cylindrical mirror trim ring of fast axle shaping, 13, slow axis shaping cylindrical mirror, 14, slow axis shaping cylindrical mirror trim ring, 15, rising angle controls lens, 16, the even smooth plain film of heterogeneity, 17,100% transmitance part, 18,80% through dispersion angle 10 ° of regions, and 19,70% through dispersion angle 20 ° of regions, and 20,50% through dispersion angle 45 ° of regions, and 21,40% through dispersion angle 60 ° of regions.
Embodiment
Term: the definition of fast axle, slow axis:
The fast axle of semiconductor laser, is also called vertical divergence angle θ ⊥, is the angle that the luminous zone of semiconductor laser device opens in vertical PN junctions direction, generally at 15 ° ~ about 40 °.The slow axis of semiconductor laser, is also called horizontal divergence angle θ ∥, is the angle that the luminous zone of semiconductor laser and PN junction parallel direction are opened, generally at 6 °--and 10 °.
In order to make those skilled in the art more clearly understand, the laser illuminator limited with the parameter of concrete quantification below describes the concrete structure of involved luminaire of the present invention.
With reference to Figure of description 2 and 3, semiconductor laser 11 adaptation embeds radiator fan 2, and both power supplies are supplied by feed circuit plate 1.
As illustrated in figs. ia and ib, semiconductor laser 11 rising angle is the rectangular light spot of 8 ° × 40 °, horizontal direction slow axis 8 °, 40 °, vertical direction quick axle.Through the micro-cylindrical mirror of too fast axle shaping 10, fast shaft angle degree is carried out compression process, make its vertical dispersion angle be about 10 °, can by regulating fast axle shaping micro-cylindrical mirror mirror holder 4 this dispersion angle of position adjustments in coaxial fixed lens barrel 6.
At this, because cylindrical lens only has a direction to have curvature, when using slow axis equipment to slow axis process, do not affect fast axle, can think that fast axle is still as before, or original dispersion angle, otherwise understand according to same principle.
Slow axis shaping cylindrical mirror 13 is dispersed slow axis divergence angle and is shaped as 20 ° of dispersion angles, light beam after fast and slow axis shaping controls lens 15 through rising angle again and carries out final Angle ambiguity, control by rising angle the angle that the front and back position of lens mirror holder in coaxial fixed lens barrel 6 can regulate bright dipping, be generally level 8 ° × vertical 4 °.
Eventually pass the main beam that rising angle control is positive and negative 2 ° of vertical center by the even smooth plain film 16 of heterogeneity, and the gradual change departing from maximum 20 ° of central lower weakens time light beam, level is the main beam of positive and negative 4 °, and the gradual change of maximum positive and negative 30 ° weakens secondary light beam.
The even smooth plain film of a kind of heterogeneity, for vehicle-mounted illuminating imager, illumination levels angle requirement is large, the demand that vertical direction irradiating angle irradiates downwards, and only to full impregnated mistake on the upside of light beam, downside small part is carried out reduction and dispersed process, thus irradiates closely road both sides.Effectively can utilize laser energy by this even smooth plain film, ensure the horizontal Large visual angle of vehicle-mounted imaging illumination, the requirement clearly of far and near distance road lighting imagewise uniform.
About the even mating plate of heterogeneity, further, refer to the schematic diagram shown in Figure of description 6, the separatrix not necessary being of differentiation plain film top and the bottom and below each transmitance part, but the boost line distinguishing various piece.
Absolute two halves up and down is not represented about upper and lower two parts.
In the structure shown in Fig. 6, according to transmitance, the tablets of the even light shaping plain film of described heterogeneity is configured to up-down structure, its middle and upper part is full permeation parts, 100% transmitance part 17 as shown in Figure 1, bottom is component permeate part, each part formed through dispersion angle region as shown in Figure 1, 80% through dispersion angle 10 ° of regions 18, 70% through dispersion angle 20 ° of regions 19, 50% through dispersion angle 45 ° of regions 20, 40% through dispersion angle 60 ° of regions 21, the optical parametric that heterogeneity is just embodied in the various piece of mirror body is different, foregoing transmitance.The dispersion angle of the various piece of figure middle and lower part is also different, thus there will be that dispersion angle far away is little but beam intensity ratio is higher, the large but state that beam intensity ratio is lower of nearly dispersion angle.
Should be appreciated that full impregnated is crossed is the perfect condition of optical field, as a concept, still by this area is commonly used, but does not represent 100% desirable transmitance, is to be understood that this those skilled in the art.
With reference to the bottom shown in Fig. 6, its transmitance with tablets center for benchmark outwards reduces gradually, utilize electric torch effect like this, remote projection unit divides output intensity relatively large, the output intensity of in-plant submarginal part in other words reduces gradually, adapts to the feature that distance causes irradiation intensity to decay.
In Fig. 4, left figure is conventional uniform illuminating effect, light intensity within the scope of far and near hot spot is consistent, therefore scenery compares at a distance short because of light path nearby, simultaneously due to object, diffuse reflection is generally to dispersing of light, suppose that irradiating light decay in an atmosphere in the past ignores, 1 meter and the 100 meters laser power reflected in equal area will differ the long-pending multiplying power of spherome surface.The computing formula that spherome surface is long-pending again
, do not consider atmospheric attenuation, the luminous energy difference of 1 meter that is received by identical bore imaging device and 100 meters is about 10,000 times.Because the resolution characteristic of imaging device to luminance brightness is limited, therefore Image Adjusting display can be carried out according to the mean value of picture.Shown in the left figure of Fig. 4, scenery is very bright nearby, and the brightness of the targets such as distant place background will be very dark, thus can not realize throwing light on more at a distance, contributes to traffic safety.It is just variant with the luminous energy of scenery irradiation at a distance that picture shown in the right figure of Fig. 4 can realize scenery nearby through illustrated technology, light intensity is weak nearby, light intensity is strong at a distance at center, be partial to road surface to irradiate simultaneously, can imaging, greatly raising imaging display distance when distant place in visual field and Scenery Imaging nearby can be shown.
In addition, adopt described narrow linewidth laser, coordinate imaging device to be also furnished with the narrow linewidth optical filter of identical live width, the high light inhibition to car light can be realized.As shown in Figure 5, in Fig. 5, left figure is that non-high light suppresses head-on car light effect, and right figure is the effect having high light to suppress adopting narrow linewidth laser to coordinate optical filtering imaging.
The present invention can pass through without the technical characteristic described or adopt existing techniques in realizing, do not repeat them here, certainly, above-mentioned explanation is not limitation of the present invention, and the present invention is also not limited in above-mentioned citing, also can be other non-visible light band laser, the heterogeneity of the light distribution of bright dipping hot spot also can be two kinds of dispersion angles, or the asymmetry of other left and right form, not necessarily gradual change weakens, and upper and lower unsymmetric form.The change that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (8)
1. a laser night vision auxiliary driving laser illuminator, comprise laser instrument and the camera lens being assemblied in laser emitting window, it is characterized in that, laser emitting laser level direction is slow axis, vertical direction is fast axle, correspondingly, camera lens from rear to being front furnished with the fast axle lens combination for fast axle compression shaping, the slow axis lens combination for slow axis divergence shaping, the rising angle that controls for main beam rising angle control lens, the even smooth plain film of heterogeneity for generation of outgoing beam, thus produces the secondary light beam that the main beam of long drive and close-range shot disperse; Fast axle lens combination and rising angle control lens and are furnished with the governor motion regulated at fore-and-aft direction separately.
2. laser night vision according to claim 1 is auxiliary drives laser illuminator, it is characterized in that, under the even smooth plain film of described heterogeneity makes main beam ensure to be greater than the prerequisite of the transmitance of 80%, according to predetermined vertical level angle outgoing, secondary light beam by main beam through the even smooth plain film scattering of heterogeneity, while guarantee light successively decreases successively from center to edge, can be greater than the angle of divergence outgoing of 50 degree of dispersion angles.
3. laser night vision according to claim 2 is auxiliary drives laser illuminator, and it is characterized in that, the even smooth plain film of described heterogeneity has the even photo structure of asymmetrical gradual change.
4. the laser night vision according to Claims 2 or 3 is auxiliary drives laser illuminator, and it is characterized in that, the even smooth plain film of described heterogeneity is upper and lower composite structure, and wherein upper part has transmission effect to main beam, and lower part has disperse function to main beam.
5. laser night vision according to claim 1 is auxiliary drives laser illuminator, and it is characterized in that, described laser instrument is narrow linewidth semiconductor laser, and it is furnished with radiator structure.
6. laser night vision according to claim 5 is auxiliary drives laser illuminator, it is characterized in that, described radiator structure comprises the radiator fan of laser instrument side assembling and the heat radiator of coupling radiator fan.
7. laser night vision according to claim 6 is auxiliary drives laser illuminator, it is characterized in that, described laser instrument is fixed in the rectangular parallelepiped cavity of heat radiator formation, and rectangular parallelepiped cavity one side has the groove holding radiator fan, thus radiator fan forms embedded-type heat-dissipating fan.
8., according to claim 1, the arbitrary described laser night vision of 5-7 auxiliary driving laser illuminator, it is characterized in that, described laser instrument is narrow linewidth near infrared semiconductor laser.
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| CN201410053862.0A CN103792666B (en) | 2014-02-18 | 2014-02-18 | Laser night vision is auxiliary drives laser illuminator |
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| CN201410053862.0A CN103792666B (en) | 2014-02-18 | 2014-02-18 | Laser night vision is auxiliary drives laser illuminator |
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| WO2020107161A1 (en) * | 2018-11-26 | 2020-06-04 | 深圳辰锐软件开发有限公司 | Fill light device |
| CN113898883A (en) * | 2021-10-20 | 2022-01-07 | 江苏亮点光电研究有限公司 | Laser lighting device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5089023A (en) * | 1990-03-22 | 1992-02-18 | Massachusetts Institute Of Technology | Diffractive/refractive lens implant |
| CN102788317A (en) * | 2012-07-25 | 2012-11-21 | 中国科学院长春光学精密机械与物理研究所 | Novel LED total-reflection lens used for night monitoring and infrared illumination |
| CN203190060U (en) * | 2013-04-15 | 2013-09-11 | 林宗平 | Lighting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10333370A1 (en) * | 2003-07-23 | 2005-02-24 | Schott Ag | Lighting device, lens and lens manufacturing |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5089023A (en) * | 1990-03-22 | 1992-02-18 | Massachusetts Institute Of Technology | Diffractive/refractive lens implant |
| CN102788317A (en) * | 2012-07-25 | 2012-11-21 | 中国科学院长春光学精密机械与物理研究所 | Novel LED total-reflection lens used for night monitoring and infrared illumination |
| CN203190060U (en) * | 2013-04-15 | 2013-09-11 | 林宗平 | Lighting device |
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