CN208937882U - A kind of saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared - Google Patents
A kind of saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared Download PDFInfo
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- CN208937882U CN208937882U CN201821394317.8U CN201821394317U CN208937882U CN 208937882 U CN208937882 U CN 208937882U CN 201821394317 U CN201821394317 U CN 201821394317U CN 208937882 U CN208937882 U CN 208937882U
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Abstract
The utility model discloses a kind of saturating glass permeable membrane video cameras of the narrow light spectrum image-forming of all-weather infrared, camera is by infrared semiconductor laser, narrow band filter, camera lens, CCD camera is composed, infrared semiconductor laser includes the semiconductor optical amplifier chip set gradually, collimation lens, phase compensation piece, volume Bragg grating, optoisolator, semiconductor optical amplifier chip, Bragg grating forms resonant cavity, exocoel frequency-selecting element of the Bragg grating as infrared semiconductor laser, semiconductor optical amplifier chip provides gain, and Bragg grating is high-diffraction efficiency, the Bragg grating of narrow bandwidth is so that laser exports narrow-linewidth laser.Using CCD camera and infrared semiconductor laser combined imaging, round-the-clock glass permeable membrane high definition imaging function may be implemented, using narrow spectral laser device light filling, infrared laser can penetrate glass and take pictures to personnel's light filling in interior or room, assist in traffic control department and implement traffic monitoring, early warning and reconnaissance and candid photograph violating the regulations.
Description
Technical field
The utility model relates to monitoring camera technical field, especially a kind of saturating glass permeable membrane of the narrow light spectrum image-forming of all-weather infrared
Video camera.
Background technique
Sunlight spectrum introduction: the sunlight spectral wavelength ranges for reaching earth surface are mainly 0.295~2.5 μm (micro-
Rice), i.e. 295nm~2500nm (nanometer) is broadly divided into ultra-violet (UV) band (less than 0.4 micron), (0.4 micron -0.75 of visible region
Micron) and infrared region (being greater than 0.75 micron), wherein visible region accounts for about the 50% of solar radiation gross energy, and infrared region is about
43%, ultra-violet (UV) band about 7%.Human eye response wave-length coverage is visible region.
Cutoff filter introduction: video camera CCD sensitive volume is 350-1050 nanometers, to 750-1050 nanometer range
Interior infrared light has induction, and the eyes of our mankind can't see infrared light, the in this way image after CCD incudes
It is distinguishing with the image that our eyes are seen, for example green becomes the colors colour cast phenomenon such as grey, so common color is taken the photograph
An infrared fileter (film) is pasted on camera CCD, to filter or end infrared light and correct colour cast phenomenon, become image
The consistent image seen with our eyes.This optical filter for being used to filter or end infrared light is referred to as IR cut filter
Piece.
Monitor camera optical filter and working principle: when video camera works by day, using cutoff filter, in order to mention
Image color quality is risen, infrared light is needed to filter out.When working at night, need with infrared light supply (include: infrared LED, it is infrared
Laser, infrared lamp etc.) light filling can just have night vision function, it is necessary to cutoff filter is removed, be changed to can penetrate it is infrared
The optical filter of light could make infrared light enter CCD.It is this to be referred to as full impregnated spectral filter through the optical filter of infrared light.
In the daytime automatically switched with night using double optical-filter switchers.Double optical-filter switcher principles are by one piece of circuit control panel
And switch, when the light on daytime is abundant, circuit control panel, which drives, is switched to cutoff filter work in switch,
CCD restores true color, and when night insufficient light, cutoff filter is removed automatically, and full impregnated spectral filter starts
Work, can incude the auxiliary light of evening infrared lamp, CCD is made to make full use of all light, to substantially increase infrared photography
The low of machine shines performance, entire picture clear and natural.
Cutoff filter transparent wavelength range is 400-750nm, the i.e. light of this wave band transmitance with higher
(referring generally to be greater than 30%), other wave band transmitances are very low (referring generally to less than 1%).Full impregnated spectral filter transparent wavelength range
For 400-1050nm.
General optical filter, transparent wavelength range (i.e. bandwidth) are greater than 50nm.Cutoff filter transparent wavelength range
For 400-750nm, bandwidth is about 750nm-400nm=350nm
The transparent wavelength range of narrow band filter generally only has tens nanometers of even several nanometers.It is with peak wavelength
The narrow band filter of 808nm, transmitance halfwidth 20nm are to arrange, the transmitance with higher within the scope of 798nm-818nm,
The light transmission rate of its wavelength is very low.If the narrow band filter peak wavelength of design is 808nm, transmitance halfwidth is 10nm,
The transmitance with higher within the scope of 803nm-813nm, the light transmission rate of other wavelength are very low.
Semiconductor laser, which exports laser spectrum, can generate drift with variation of ambient temperature, with 850nm semiconductor laser
For, temperature drift is about 0.32nm/ DEG C, and when temperature is increased to 30 DEG C by 20 DEG C, output spectrum occurs with the raising of operating temperature
Apparent drift, peak wavelength drift to 853.3nm by 850nm.
Common monitor camera mostly uses double optical-filter switchers, switches to cutoff filter daytime, night adopts
With white light LEDs or infrared LED light filling, optical filter is switched to full impregnated spectral filter.Mainly by double optical-filter switchers, camera lens,
CCD and white light LEDs (or infrared LED) are constituted.
Laser night-vision device is mainly night using the illumination imaging of infrared laser light filling, free of light filter.Mainly by laser light filling
Light source, camera lens, CCD are constituted.
General-utility car pad pasting or coated glass are relatively low to visible light transmittance, to infrared light transmitance with higher.
Existing video camera cannot shoot occupant's high definition photo through vehicle window in backlight on daytime, cannot especially penetrate
Dark pad pasting side window glass shoots occupant's high definition photo；Equally, fraction of laser light night vision device or laser imaging apparatus, use are narrow
Band optical filter is combined with semiconductor infrared laser, also can be realized the shooting of glass permeable membrane.But since semiconductor laser is by ring
Border temperature influences, and transmitting laser spectral peak wavelength can vary with temperature and wave length shift occurs.Only emit laser light spectral peak
It is worth wavelength when narrow band filter is through in wave-length coverage, can just there is preferable glass permeable membrane imaging effect thoroughly.If daytime in summer
Saturating glass permeable membrane imaging effect is poor when high temperature or winter low temperature.If semiconductor laser does not use spectrum frequency stabilization measure,
Stable saturating glass permeable membrane imaging effect cannot be formed.
Summary of the invention
The utility model purpose of design is: in view of the deficiency of prior art condition, we, which design, proposes that one kind is round-the-clock red
The outer narrow saturating glass permeable membrane video camera of light spectrum image-forming, is not influenced by various light, can be under strong sunlight disturbed condition on daytime, night
Under various light disturbed conditions or under the conditions of night is completely black, the high definition photo of personnel in interior or room is obtained through glass, no
By adhering film to glass or coating influence.
To achieve the above objectives, the present invention adopts the following technical solutions:
A kind of saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared, the video camera by infrared semiconductor laser,
Narrow band filter, camera lens, CCD camera are composed.The infrared semiconductor laser can with other part integrations,
It split type can be applied in combination, the infrared semiconductor laser can be one, be also possible to more, the infrared semiconductor
Laser includes the infrared semiconductor laser diode set gradually, reflective volume Bragg grating, infrared semiconductor laser two
The outgoing light direction and volume Bragg grating of pole pipe feed back light direction on the same line, but contrary, and the two constitutes
Linear type exocoel infrared semiconductor laser.The infrared semiconductor laser diode, volume Bragg grating form resonant cavity, institute
Exocoel frequency-selecting element of the volume Bragg grating as infrared semiconductor laser is stated, semiconductor laser output spectrum can be compressed
Line width simultaneously improves spectrum stability.
The outgoing light direction and body grating of semiconductor laser diode feed back light direction on the same line, but direction phase
Instead, the two constitutes linear type exocoel infrared semiconductor laser.Volume Bragg grating is as the outer of infrared semiconductor laser
Chamber frequency-selecting element can compress semiconductor laser output spectrum line width and improve spectrum stability.Therefore, the infrared of output is swashed
Light penetrates pad pasting or coated glass, and to personage's light filling in interior or room, infrared laser is again passed through pad pasting after personage is reflected
Or coated glass, through lens imaging to CCD camera.
Further, the infrared semiconductor laser diode can be common infra-red laser diode, be also possible to hang down
Straight cavity surface-emitting laser diode (VCSEL laser), output wavelength preferred 808nm, 850nm, 880nm, 940nm common half
Conductor Laser output wavelength.
Further, the narrow band filter, transparent wavelength range are less than 30nm, can eliminate various exterior light interference,
Including sunlight and night lights, narrow band filter light transmission peak wavelength preferred 808nm, 850nm, 880nm, 940nm are common
Near-infrared semiconductor laser exports peak value spectrum, and the narrow band filter can respectively fill one group before and after camera lens, can also only exist
Install one group in camera lens above or below.
Further, the infrared semiconductor laser Emission Spectrum Peals wavelength is the narrow band filter light transmitting wavelength
Laser in range, the infrared semiconductor laser emission spectrum halfwidth are less than the narrow band filter light transmitting wavelength band
It is wide.
Further, the linear type exocoel infrared semiconductor laser that the volume Bragg grating is formed becomes in environment temperature
When change (- 10 degrees Celsius~50 degrees Celsius), the peak wavelength drift value of laser spectrum is exported less than 2 nanometers.
Further, the infrared semiconductor laser working method can be to be always on, or external trigger pulse hair
Light.
As further scheme, the semiconductor laser diode rear end of the infrared semiconductor laser be equipped with radiator and
Electric heater, summer start radiator heat-dissipation, the heating of winter starting electric heater.
Compared with prior art, implement the saturating glass permeable membrane camera shooting of the narrow light spectrum image-forming of all-weather infrared of the utility model
Machine has the advantages that
1. glass (including coated glass, pad pasting glass) can be penetrated using infrared laser to mend personnel in interior or room
Photo-beat is shone or camera shooting；
2. using narrow band filter, various exterior light interference, including sunlight and night various light can be eliminated；Narrowband
Optical filter light transmitting wavelength bandwidth is narrower, and the ability for eliminating various external disturbance light is stronger, and saturating glass permeable membrane imaging effect is better.
3. carrying out semiconductor laser frequency stabilization using volume Bragg grating, when ensure that variation of ambient temperature, not will lead to red
Outside outer semiconductor laser Emission Spectrum Peals wave length shift to narrow band filter transparent wavelength range, to ensure that glass is saturating
The stability of film imaging assists in traffic control department and implements traffic monitoring, early warning and reconnaissance and candid photograph violating the regulations or image scouting.
4. carrying out semiconductor laser frequency stabilization using volume Bragg grating, in variation of ambient temperature, (- 10 degrees Celsius~50 are taken the photograph
Family name's degree), the peak wavelength drift value for exporting laser spectrum is less than ± 2 nanometers, so as to use light transmitting wavelength bandwidth for 5~
The narrow band filter of 30nm can produce extraordinary glass permeable membrane imaging effect using the narrow band filter of 5nm bandwidth, use
The narrow band filter of 30nm bandwidth can produce preferable glass permeable membrane imaging effect thoroughly；
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described.
Fig. 1 is the schematic diagram of the infrared narrow saturating glass permeable membrane video camera of light spectrum image-forming of the utility model；
Fig. 2 is the schematic diagram of internal structure of the infrared narrow saturating glass permeable membrane video camera of light spectrum image-forming of the utility model；
Fig. 3 is the structural schematic diagram of infrared semiconductor laser described in the utility model；
Fig. 4 is the effect picture that the common camera of the utility model embodiment 1 is shot；
Fig. 5 is the shooting effect figure of the infrared narrow saturating glass permeable membrane video camera of light spectrum image-forming of the utility model embodiment 1；
Fig. 6 is that the vehicle forward sight of the utility model embodiment 2 shoots contrast effect figure；
Fig. 7 is that the vehicle side view of the utility model embodiment 2 shoots contrast effect figure；
Wherein, 1- narrow band filter I, 2- camera lens, 3- narrow band filter II, 4-CCD video camera, 5- radiator, 6- are infrared
Semiconductor laser, 61- infrared semiconductor laser diode, 62- volume Bragg grating, 63- electric heater, 64- radiator,
7- shell, 8- rack, 9- data connection head.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.
Fig. 1-3 is please referred to, it is described the utility model proposes a kind of saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared
Video camera is composed of infrared semiconductor laser 6, narrow band filter (1,3), camera lens 2, CCD camera 4, described infrared by half
Conductor laser 6 includes semiconductor laser chip 61, volume Bragg grating 62, electric heater 63, the radiator 64 set gradually,
The semiconductor optical amplifier chip 61, volume Bragg grating 62 form linear type external cavity semiconductor laser, described Prague
Exocoel frequency-selecting element of the body grating 62 as narrow linewidth semiconductor laser makes laser export narrow-linewidth laser, the Bradley
Lattice body grating 62 is used as spectrum frequency stabilization element, stablizes laser output light spectrum.
Further embodiment is the preferably reflective volume Bragg grating of the volume Bragg grating, semiconductor laser
The outgoing light direction and volume Bragg grating of diode feed back light direction on the same line, but contrary, and the two is constituted
Linear type exocoel infrared semiconductor laser.Ante-chamber of the volume Bragg grating as infrared semiconductor laser resonant cavity
Mirror, a part of diffraction light return the semiconductor laser diode chip through frequency-selecting back reflection and form laser resonance, penetrate after fold-back
Volume Bragg grating forms outgoing infrared laser.
Further embodiment is that the linear type exocoel infrared semiconductor laser exports laser spectrum central wavelength
It is determined, is influenced by temperature change very small by the parameter of volume Bragg grating.
Further embodiment is that the infrared laser of the linear type exocoel infrared semiconductor laser output is through patch
Film or coated glass, to personage's light filling in interior or room, infrared laser is again passed through pad pasting or plated film glass after personage is reflected
Glass, through lens imaging to CCD camera.
Further embodiment is that the narrow band filter eliminates various exterior light interference, including sunlight and night
Various light only allow infrared laser to enter CCD camera imaging, to realize that glass permeable membrane high definition is imaged.
Embodiment 1:
The present embodiment is scene 1: at noon, reversible-light shooting, headstock is northwards.
Camera lens mounting means: 6 meters of height, cross bar, color high-definition video camera and infrared glass permeable membrane video camera
Identical place, same time shooting, contrast effect is refering to Fig. 4, Fig. 5:
It can be seen that the occupant's fogging image photographed using common camera (it is soft to be not enough to people's progress face identification in Fig. 4
Part identification) it even claps completely less than occupant's image, back sunray is dark, can not obtain the environment inside car being more clear；
And Fig. 5 is reviewed, clearly may be used using passenger inside the vehicle's facial image that the infrared narrow saturating glass permeable membrane video camera of light spectrum image-forming can take
See, can achieve face recognition software identification condition, copilot passenger, which does not fasten one's safety belt, also to be arrived by candid photograph, especially passenger
Sunglasses are worn, still can realize ocular imaging through sunglasses.
Embodiment 2:
The present embodiment is scene 2: certain unit entrance.
Camera lens mounting means: 1.7 meters of height, upright bar, color high-definition video camera and infrared glass permeable membrane video camera
Identical place, same time shooting, contrast effect please refer to Fig. 6, Fig. 7:
Common camera can not obtain interior personage's high-definition image through side window dark color pad pasting glass, can't see completely.
Using the infrared narrow saturating glass permeable membrane camera shooting function of light spectrum image-forming through front vehicle window and dark pad pasting side vehicle window, obtain
Interior personage's high-definition image can achieve face recognition software identification condition.
The embodiments of the present invention is explained in detail above in conjunction with attached drawing, but the utility model is not limited to
Above embodiment can also not depart from the utility model within the knowledge of a person skilled in the art
It makes a variety of changes, modify under the premise of objective, replacement and variant, the scope of the utility model is by appended claims and its waits
Jljl limits.
Claims (7)
1. a kind of saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared, it is characterised in that: the video camera is partly led by infrared
Body laser, narrow band filter, camera lens, CCD camera are composed, and the infrared semiconductor laser can be with other components
Integration split type can also be applied in combination, and the infrared semiconductor laser can be one, be also possible to more, described
Infrared semiconductor laser includes the infrared semiconductor laser diode set gradually, reflective volume Bragg grating, infrared by half
The outgoing light direction and body grating of conductor Laser diode feed back light direction on the same line, and contrary, and the two is constituted
Linear type exocoel infrared semiconductor laser, the infrared semiconductor laser diode, volume Bragg grating form resonant cavity.
2. the saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared according to claim 1, it is characterised in that: the cloth
Exocoel frequency-selecting element of the glug body grating as infrared semiconductor laser, can compress semiconductor laser output spectrum line width
And spectrum stability is improved, infrared semiconductor laser diode can be common infra-red laser diode, be also possible to vertical cavity
Surface-emission laser diode, output wavelength preferred 808nm, 850nm, 880nm, 940nm common semiconductor laser output wavelength.
3. the saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared according to claim 1, it is characterised in that: described narrow
Band optical filter, transparent wavelength range are less than 30nm, can eliminate various exterior light interference, including sunlight and night lights, narrow
Band optical filter light transmission peak wavelength preferred 808nm, 850nm, 880nm, 940nm common near-infrared semiconductor laser export peak value
Spectrum, the narrow band filter can respectively fill one group before and after camera lens, only can also install one group in camera lens above or below.
4. the saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared according to claim 1, it is characterised in that: the cloth
In -10 DEG C~50 DEG C of variation of ambient temperature, output swashs the linear type exocoel infrared semiconductor laser that glug body grating is formed
The peak wavelength drift value of light spectrum is less than 2 nanometers.
5. the saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared according to claim 1, it is characterised in that: described red
Outer semiconductor laser Emission Spectrum Peals wavelength is in the narrow band filter transparent wavelength range, and the infrared semiconductor swashs
Light device emission spectrum halfwidth is less than the narrow band filter light transmitting wavelength bandwidth.
6. the saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared according to claim 1, it is characterised in that: described red
Outer semiconductor laser works mode can be to be always on, or external trigger pulse shines.
7. the saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared according to claim 1, it is characterised in that: described red
The semiconductor laser diode rear end of outer semiconductor laser is equipped with radiator and electric heater, and summer starts radiator heat-dissipation,
The heating of winter starting electric heater.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821394317.8U CN208937882U (en) | 2018-08-28 | 2018-08-28 | A kind of saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared |
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| CN201821394317.8U CN208937882U (en) | 2018-08-28 | 2018-08-28 | A kind of saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983531A (en) * | 2018-08-28 | 2018-12-11 | 中盾金卫激光科技（昆山）有限公司 | A kind of saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared |
| CN114866672A (en) * | 2022-05-09 | 2022-08-05 | 中盾金卫激光科技（昆山）有限公司 | Novel infrared glass-transparent film camera |
-
2018
- 2018-08-28 CN CN201821394317.8U patent/CN208937882U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983531A (en) * | 2018-08-28 | 2018-12-11 | 中盾金卫激光科技（昆山）有限公司 | A kind of saturating glass permeable membrane video camera of the narrow light spectrum image-forming of all-weather infrared |
| CN114866672A (en) * | 2022-05-09 | 2022-08-05 | 中盾金卫激光科技（昆山）有限公司 | Novel infrared glass-transparent film camera |
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