CN103836450A - Infrared zoom lighting device, control method thereof and infrared zoom camera - Google Patents
Infrared zoom lighting device, control method thereof and infrared zoom camera Download PDFInfo
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- CN103836450A CN103836450A CN201210490991.7A CN201210490991A CN103836450A CN 103836450 A CN103836450 A CN 103836450A CN 201210490991 A CN201210490991 A CN 201210490991A CN 103836450 A CN103836450 A CN 103836450A
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Abstract
The invention discloses an infrared zoom lighting device, a control method thereof and an infrared zoom camera. The infrared zoom lighting device comprises an infrared transmitter, a zoom lens group, a lens switching mechanism and a control unit. The infrared transmitter is used for transmitting infrared light. The zoom lens group comprises at least one zoom lens capable of being switched onto a main transmitting optical axis of the infrared transmitter. The lens switching mechanism is used for switching the corresponding zoom lenses of the zoom lens group onto the main transmitting optical axis of the infrared transmitter according to a first control instruction obtained from the control unit. The control unit is used for sending the first control instruction to the lens switching mechanism according to a focusing instruction sent by the infrared zoom camera. By the adoption of the lens switching mode, the light emitting angle of a lighting beam is controlled; due to the fact that the axial distance between the lenses is small and remains unchanged, lateral leakage of the lighting beam is little, so that emergent light of a light source can still be fully used under the condition that the light beam performs lighting in a large light emitting angle and a small light emitting angle, and therefore the lighting characteristics are considered at different light emitting angles.
Description
Technical field
The present invention relates to lighting engineering and zoom technology field, in particular to the infrared zooming illuminating apparatus of one and control method thereof, infrared Zoom camera.
Background technology
Utilize the near-infrared semiconductor light sources with lighting function that semiconductor technology makes because it has energy-conservationly, efficient, the features such as environmental protection, are widely used in infrared illumination, spectrum analysis, optical sensing, the fields such as optic communication.
Existing infrared light supply often adopts stepper motor to drive zoom module control rising angle, and the spot size that makes to be irradiated to predetermined field of illumination meets the lighting demand of thermal camera.But, conventionally, by closely in remote lighting process, need to increase the distance of moving lens and fixed lens (or light source), in the hope of reaching suitable illumination rising angle.But adopt this zoom mode to make more infrared light luminous energy occur to reveal and loss, the Illumination Distribution homogenising on illuminated area is difficulty comparatively, can not finely take into account the illumination characteristic in larger rising angle and less rising angle situation.In addition,, for most of light sources, its luminous intensity can not automatically adjust in conjunction with bias light according to required real needs.
The Chinese patent literature that patent publication No. is respectively CN 101334144 and CN 201232954Y discloses a kind of varifocal light fixture, and this light fixture mainly comprises the devices such as the infrared transmitter, lamp body, lens of back seat, belt substrate.For this light fixture, it carries out zoom by the distance between manual adjustments simple lens and light source, thereby controls rising angle, adjusting spot size.
This patent scheme has realized the zoom of illuminator, but it still exists following problem:
1) this varifocal light fixture, in zoom process, need to carry out manual operation to complete zoom by operator, has increased undoubtedly operator's working strength, has reduced the availability of this varifocal light fixture;
2) being somebody's turn to do the varifocal light fixture that carry out zoom based on lens distance variation, to realize in the process of zoom, will inevitably there is light leakage and light loss problem in its distance between adjustment lens and light source;
3) this varifocal light fixture its in zoom process, the power invariability of its illuminating source is constant, for various bias light condition, easily causes the waste of energy consumption, and likely can cause video camera overexposure problem.
Summary of the invention
In order to solve the problems of the technologies described above, the object of the present invention is to provide a kind of infrared zooming illuminating apparatus and control method thereof, infrared Zoom camera.
In order to reach object of the present invention, the present invention realizes by the following technical solutions:
A kind of infrared zooming illuminating apparatus, comprising:
Infrared transmitter, for launching infrared light;
Variable focus lens package, it comprises the zoom lens at least one transmitting primary optical axis that switches to infrared transmitter;
Lens switching mechanism, for being switched to corresponding variable focus lens package zoom lens according to the first control command of obtaining from control module the transmitting primary optical axis of infrared transmitter;
Control module, sends the first control command for the focusing instruction sending according to infrared Zoom camera to lens switching mechanism.
Preferably, described infrared zooming illuminating apparatus also comprises:
Fixed lens, it is arranged on the transmitting primary optical axis of described infrared transmitter, and fixed lens is between infrared transmitter and variable focus lens package.
Under a kind of embodiment, the zoom lens of described variable focus lens package are fixedly arranged on a movable axis, and described zoom lens have the first driving cog;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the first driving cog of the zoom lens of variable focus lens package;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
Under another kind of embodiment, the zoom lens of described variable focus lens package are fixedly arranged on a uni-drive gear box, described uni-drive gear box has at least one second driving cog of arranging side by side, and described uni-drive gear box is arranged on a fixing reach movably;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the second driving cog of uni-drive gear box;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
Preferably, the zoom lens of described variable focus lens package stagger and arrange and be fixedly arranged on a movable axis, and/or, the zoom lens of described variable focus lens package stagger and arrange and be fixedly arranged on a uni-drive gear box, and/or, described travelling gear is sector gear, and described sector gear is arranged for staggering on described fixed axis.
Preferably, described infrared zooming illuminating apparatus also comprises:
Radiation intensity probe unit, the reflected light signal being reflected back for detection of illuminated object, and send it to control module;
Described control module, further generates the second control command according to this reflected light signal, and sends it to infrared transmitter;
Described infrared transmitter, further described the second control command of foundation is adjusted the transmitting power of infrared light.
A kind of infrared Zoom camera, it comprises infrared zooming illuminating apparatus as above, described device comprises:
Infrared transmitter, for launching infrared light;
Variable focus lens package, it comprises the zoom lens at least one transmitting primary optical axis that switches to infrared transmitter;
Lens switching mechanism, for being switched to corresponding variable focus lens package zoom lens according to the first control command of obtaining from control module the transmitting primary optical axis of infrared transmitter;
Control module, sends the first control command for the focusing instruction sending according to infrared Zoom camera to lens switching mechanism.
A control method for infrared zooming illuminating apparatus, its infrared zooming illuminating apparatus corresponding with the method comprises infrared transmitter, fixed lens, variable focus lens package, lens switching mechanism and control module, described method comprises:
Control module obtains the focusing instruction that infrared Zoom camera sends, and sends the first control command to lens switching mechanism accordingly;
Lens switching mechanism is switched to corresponding variable focus lens package zoom lens the transmitting primary optical axis of infrared transmitter according to the first control command of obtaining from control module;
Wherein, described infrared transmitter is used for launching infrared light; Described variable focus lens package, it comprises the zoom lens at least one transmitting primary optical axis that switches to infrared transmitter.
Preferably, described infrared zooming illuminating apparatus also comprises fixed lens, and it is arranged on the transmitting primary optical axis of described infrared transmitter, and fixed lens is between infrared transmitter and variable focus lens package.
Under a kind of embodiment, the zoom lens of described variable focus lens package are fixedly arranged on a movable axis, and described zoom lens have the first driving cog;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the first driving cog of the zoom lens of variable focus lens package;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
Under another kind of embodiment, the zoom lens of described variable focus lens package are fixedly arranged on a uni-drive gear box, described uni-drive gear box has at least one second driving cog of arranging side by side, and described uni-drive gear box is arranged on a fixing reach movably;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the second driving cog of uni-drive gear box;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
Preferably, the infrared zooming illuminating apparatus corresponding with the method also comprises radiation intensity probe unit.Described method also comprises:
Radiation intensity probe unit detects the reflected light signal that illuminated object is reflected back, and sends it to control module;
Control module generates the second control command according to this reflected light signal, and sends it to infrared transmitter;
Infrared transmitter is adjusted the transmitting power of infrared light according to described the second control command.
In order to overcome the deficiency of existing lighting engineering, the invention provides a kind of efficient, can closed-loop control, rising angle and adjustable infrared zooming illuminating apparatus and the control method thereof of spot size.The present invention adopts the switching lens mode of cramped construction, and the rising angle of illumination beam is controlled; Due in zoom process between lens and lens axial spacing less and remain unchanged, illuminating bundle side direction is revealed less, so light beam still can make full use of the emergent light of light source in the situation that of large rising angle illumination and the illumination of little rising angle, and the photocurrent versus light intensity in the time of different rising angle is taken into account.Meanwhile, the present invention has adopted radiation intensity probe unit, and take the output signal of this unit as reference, control module can be controlled the driving power of light source, makes under different scenes, and it is optimum that illuminating effect reaches, and reduced energy consumption.
Accompanying drawing explanation
Fig. 1 is the infrared zooming illuminating apparatus illustrative view of functional configuration that the embodiment of the present invention provides;
Fig. 2 is the concrete structure schematic diagram of the infrared zooming illuminating apparatus that provides of one embodiment of the invention;
Fig. 3 is the top view of the infrared zooming illuminating apparatus described in Fig. 2;
Fig. 4 is the concrete structure schematic diagram of the infrared zooming illuminating apparatus that provides of another embodiment of the present invention;
Fig. 5 is the top view of the infrared zooming illuminating apparatus described in Fig. 4.
Realization, functional characteristics and the excellent effect of the object of the invention, be described further below in conjunction with specific embodiment and accompanying drawing.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, can be implemented so that those skilled in the art can better understand the present invention also, but illustrated embodiment is not as a limitation of the invention.
The infrared zooming illuminating apparatus of one that the embodiment of the present invention provides, as shown in Figure 1, it comprises:
Infrared transmitter, for launching infrared light;
Variable focus lens package, it comprises the zoom lens at least one transmitting primary optical axis that switches to infrared transmitter;
Lens switching mechanism, for being switched to corresponding variable focus lens package zoom lens according to the first control command of obtaining from control module the transmitting primary optical axis of infrared transmitter;
Control module, sends the first control command for the focusing instruction sending according to infrared Zoom camera to lens switching mechanism.
The transmitting primary optical axis that is appreciated that described infrared transmitter refers to the optical axis of this infrared zooming illuminating apparatus in the time of real work.In embodiments of the present invention, in the time that control module is carried out switching according to the focusing instruction control lens switching mechanism of infrared Zoom camera transmission to the zoom lens in variable focus lens package, need to control the axle center of each corresponding zoom lens is overlapped with this transmitting primary optical axis.
Particularly, described infrared zooming illuminating apparatus also comprises:
Fixed lens, it is arranged on the transmitting primary optical axis of described infrared transmitter, and fixed lens is between infrared transmitter and variable focus lens package.
Under a kind of embodiment, the zoom lens of described variable focus lens package are fixedly arranged on a movable axis, and described zoom lens have the first driving cog;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the first driving cog of the zoom lens of variable focus lens package;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
Under another kind of embodiment, the zoom lens of described variable focus lens package are fixedly arranged on a uni-drive gear box, described uni-drive gear box has at least one second driving cog of arranging side by side, and described uni-drive gear box is arranged on a fixing reach movably;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the second driving cog of uni-drive gear box;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
Wherein, the zoom lens of described variable focus lens package stagger and arrange and be fixedly arranged on a movable axis, and/or, the zoom lens of described variable focus lens package stagger and arrange and be fixedly arranged on a uni-drive gear box, and/or, described travelling gear is sector gear, and described sector gear is arranged for staggering on described fixed axis.
Preferably, described infrared zooming illuminating apparatus also comprises:
Radiation intensity probe unit, the reflected light signal being reflected back for detection of illuminated object, and send it to control module;
Described control module, further generates the second control command according to this reflected light signal, and sends it to infrared transmitter;
Described infrared transmitter, further described the second control command of foundation is adjusted the transmitting power of infrared light.
Below, the specific embodiment of the invention is fixedly arranged on a uni-drive gear box as example is told about invention spirit of the present invention take the zoom lens of described variable focus lens package.
Particularly, shown in figure 1, Fig. 2 and Fig. 3, the infrared zoom lens control device that the specific embodiment of the invention provides comprises:
The infrared transmitter 10 of belt substrate, back seat 9, fixed lens 8, variable focus lens package (6,7), uni-drive gear box (4,5), the supporting construction 10 of uni-drive gear box (4,5), stepper motor 1, fan-shaped driving gear group (2,3), control module 11, and radiation intensity probe unit 12.
The infrared transmitter 10 of described belt substrate is positioned on back seat 9;
Described fixed lens 8 is positioned at the dead ahead of belt substrate infrared transmitter 10;
The side of leaving illuminator optical axis that described variable focus lens package (6,7) is positioned in the time not working turns to optical axis position in the time of work, and variable focus lens package (6,7) is the arrangement of multiple lens; The zoom lens (6,7) that complete rotation are positioned on the optical axis of illuminator in the time of work, and its bottom and brace table 15 joints, guaranteed its benchmark in lengthwise position;
Zoom lens and uni-drive gear box (4,5) can (for example, around a fixing reach) be rotated around the axle center of its uni-drive gear box (4,5)
Described variable focus lens package (6,7) can be fixedly connected with its uni-drive gear box (4,5), and zoom lens (6,7) can be rotated around the axle center of its travelling gear with driving gear set (2,3), and its back shaft 14 is fixed itself;
The travelling gear of described stepper motor 1 is one group of fan-shaped driving gear group (2,3), this gear engages with the uni-drive gear box (4,5) of variable focus lens package (6,7) in the time of work, in the time not working, do not contact with the uni-drive gear box (4,5) of zoom lens, in this group gear, different gears are arranged in the driving shaft of stepper motor successively, and its spacing drives the different and different of set of lenses driving gear set from the distribution of axial angle because of it.
Described driving gear set (2,3) is one group of fan-shaped driving gear, this travelling gear engages with the travelling gear of uni-drive gear box (4,5) in the time of work, in the time not working, do not engage with the uni-drive gear box (4,5) of zoom lens, in this group fan-shaped driving gear, different gears are arranged on the driving shaft of stepper motor 1 side by side, and the distribution of its spacing and axial angle is different because of the second driving cog on its uni-drive gear box driving (4,5).
Its basic demand is: the second driving cog on different zoom lens and the uni-drive gear box (4,5) corresponding with it should not contact with each other collision in rotary course, fan-shaped driving gear arranged in co-axial alignment, axial angle staggers successively, and the segment angle size of fan-shaped driving gear is determined by the number of zoom lens, modulus and the number of teeth of uni-drive gear box (4,5) the second driving cog.
Described radiation intensity probe unit 12 is for surveying catoptrical intensity.
Described control module 11 is controlled infrared transmitter 10 and stepper motor 1 respectively by electrical cable 19 and electrical cable 20 according to the signal of the zoom parameters of video camera and radiation intensity probe unit 12, and described control module 11 is connected by electrical cable 18 with radiation intensity probe unit 12.
Described back seat 9 is provided with threading opening.
The infrared transmitter 10 of described belt substrate is with aluminium base, and described back seat 9 adopts aluminum to make.
The switching of each zoom lens in variable focus lens package (6,7) is carried out in gear position relation and engagements different in the driving gear set (2,3) that the embodiment of the present invention drives from stepper motor 1 by the uni-drive gear box (4,5) of variable focus lens package (6,7), realizes the zoom of described optics group.
Described stepper motor 1 drives the fan-shaped driving gear group (2,3) on oneself motor axle to rotate, each fan-shaped driving gear in this fan-shaped driving gear group (2,3) and motor shaft concentric are installed, and can not move axially along motor shaft, in the variable focus lens package (6,7) that fan-shaped driving gear central angle size is driven by it, the number of zoom lens, module and reference diameter determine.
Described variable focus lens package (6,7) and uni-drive gear box (4,5) position thereof are relatively fixing, and the zoom lens in variable focus lens package (6,7) drive its rotation by its corresponding driven wheel.The rotating shaft two ends of the uni-drive gear box (4,5) of described variable focus lens package (6,7) are fixedly installed on supporting seat 13.
In the present embodiment, described radiation intensity probe unit 12 is made up of photodiode group and optical filter, intensity of reflected light to illuminated object is surveyed, its signal of telecommunication of exporting is as feedback signal, be input to after control module 11 by electrical cable 18, control the driving power of infrared transmitter 10.
For example, in the actual working state of the infrared zoom lens control device providing in the embodiment of the present invention, first zoom lens 7 are cut, and its position is positioned at the dead ahead of fixed lens 8, the optical axis coincidence of optical axis and fixed lens 8 and infrared transmitter 10, realizes primary system zoom thus;
Along with infrared Zoom camera focal length variations, rotated by the further Driving Stepping Motor 1 of control module 11, zoom lens 6 also can be cut in light path, the focal length of optics group are further regulated, according to application request.
In variable focus lens package (6,7), the number of zoom lens can be expanded, and the sheet number of the order of zoom lens incision and incision zoom lens can change according to actual light path design.Simultaneously, because the focal length of the optics group of fixed lens 8 and variable focus lens package (6,7) composition changes, therefore angle that not only can control break emergent light, and make to need the area size of illumination to change simultaneously, zoom characteristic and the angle of visual field of itself and infrared Zoom camera are matched.
Basic embodiment when the infrared zoom lens control device that illustrates the embodiment of the present invention and provide below in conjunction with accompanying drawing 1 and Fig. 2 or Fig. 3 coordinates infrared Zoom camera to use, particularly, workflow when infrared zoom lens control device and infrared Zoom camera cooperating is as follows:
Step 1: infrared Zoom camera has manual control to realize zoom in the course of work, in circuit, send zoom information from trend control module simultaneously, the specifying information of focal length is provided, calculate the control wave of the stepper motor matching with focal length of camera by self processor via control module, the direction of control step motor rotation and the concrete anglec of rotation, then by fan-shaped driving gear group (2, 3) with uni-drive gear box (4, 5) group engagement, make corresponding variable focus lens package (6, 7) zoom lens in rotate and cut or cut out light path, form the optics group of a certain focal length, rising angle to outgoing beam is controlled, coordinate thus the lighting demand of infrared Zoom camera imaging angular aperture.
Step 2: in order effectively to utilize infrared zoom lens control device, need to regulate the lighting power under its a certain priming illumination rising angle condition, to regulate the irradiation level on shadow surface, can in infrared Zoom camera, obtain comparatively suitable gray level image, adopt following implementation step:
Complete after zoom, infrared zoom lens control device reaches the lighting demand of infrared Zoom camera imaging angular aperture, after the reflection of part reverberation by plane of illumination, enter into radiation intensity probe unit, radiation intensity probe unit is surveyed this infra-red radiation emittance, export a level as radiation intensity signal to control module, control module is sampled to the amplitude of radiation intensity signal, in conjunction with required irradiation level on the shadow surface that in the focal length of camera information having had in control module and control module, memory has in advance, the signal amplitude obtaining to sampling compares, if the radiation intensity signal amplitude that real-time sampling obtains is greater than required irradiation level on the shadow surface that in control module, memory has in advance, control module reduces the transmitter driving signal power of infrared transmitter, make it to reduce the transmitting power of infrared transmitter, if the radiation intensity signal amplitude that real-time sampling obtains is less than required irradiation level on the shadow surface that in control module, memory has in advance, control module increases the transmitter driving signal power of infrared transmitter, make it to increase the transmitting power of infrared transmitter, increase the illumination on illuminated object, until illumination situation meets the illumination requirement of video camera.
In embodiments of the present invention, the zoom lens number in described variable focus lens package can be arranged voluntarily by user, and as shown in Figure 3 and 4, it shows the structure chart after zoom lens number in expansion variable focus lens package to example.It shown in figure, is the infrared zooming illuminating apparatus being formed by three rotatable zoom lens in variable focus lens package, wherein, zoom lens 6, zoom lens 7, zoom lens 16 are rotating zoom lens, gear 4 in uni-drive gear box, gear 5, gear 17 are meshed with travelling gear 2, travelling gear 3, travelling gear 20 in driving gear set on stepper motor 1 output shaft respectively, the meshing relation of the gear by the travelling gear on stepper motor 1 output shaft and uni-drive gear box, makes the zoom lens of uni-drive gear box can complete switching.Operation principle and implementation detail that it is concrete are similar to the above embodiments, do not repeat them here.
The embodiment of the present invention also provides a kind of infrared Zoom camera, and it comprises infrared zooming illuminating apparatus as above, continues with reference to figure 1, and described device comprises:
Infrared transmitter, for launching infrared light;
Variable focus lens package, it comprises the zoom lens at least one transmitting primary optical axis that switches to infrared transmitter;
Lens switching mechanism, for being switched to corresponding variable focus lens package zoom lens according to the first control command of obtaining from control module the transmitting primary optical axis of infrared transmitter;
Control module, sends the first control command for the focusing instruction sending according to infrared Zoom camera to lens switching mechanism.
Please refer to mentioned abovely for the concrete elaboration of described infrared zooming illuminating apparatus, repeat no more here.
The embodiment of the present invention also provides a kind of control method of infrared zooming illuminating apparatus, its infrared zooming illuminating apparatus corresponding with the method comprises infrared transmitter, fixed lens, variable focus lens package, lens switching mechanism and control module, and described method comprises the steps:
S10, control module obtain the focusing instruction that infrared Zoom camera sends, and send the first control command to lens switching mechanism accordingly;
S20, lens switching mechanism are switched to corresponding variable focus lens package zoom lens the transmitting primary optical axis of infrared transmitter according to the first control command of obtaining from control module;
Wherein, described infrared transmitter is used for launching infrared light; Described variable focus lens package, it comprises the zoom lens at least one transmitting primary optical axis that switches to infrared transmitter.
Preferably, described infrared zoom lens control device also comprises fixed lens, and it is arranged on the transmitting primary optical axis of described infrared transmitter, and fixed lens is between infrared transmitter and variable focus lens package;
Under a kind of embodiment, the zoom lens of described variable focus lens package are fixedly arranged on a movable axis, and described zoom lens have the first driving cog;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the first driving cog of the zoom lens of variable focus lens package;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
Under another kind of embodiment, the zoom lens of described variable focus lens package are fixedly arranged on a uni-drive gear box, described uni-drive gear box has at least one second driving cog of arranging side by side, and described uni-drive gear box is arranged on a fixing reach movably;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the second driving cog of uni-drive gear box;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
In this embodiment, because described infrared zoom lens control device comprises stepper motor, fan-shaped driving gear group, variable focus lens package, uni-drive gear box with the set of lenses interlock of appraising at the current rate, wherein:
Different travelling gears in described fan-shaped driving gear group are fixed in the rotating shaft of stepper motor, and enclose only and rotate around the axis and cannot move axially;
Different zoom lens in described variable focus lens package are fixing respectively from the different gears in its uni-drive gear box, and the zoom lens in variable focus lens package can rotate around the axle center of uni-drive gear box;
Gear in described fan-shaped driving gear group is meshed with set of lenses gear train, in stepper motor driven process, can pass through driving sector wheels, then through the uni-drive gear box of engagement, different zoom lens are driven, make it turn to needed position;
Described fixed lens is fixed on the front of infrared transmitter, and the transmitting light beam of infrared transmitter is carried out to preliminary rising angle adjustment;
Different zoom lens in described variable focus lens package, its curvature, bore, thickness and material are through optical theory and Software for Design, when described variable focus lens package is increased to zoom lens number, can adjust the rising angle of light beam, adjusted the illumination of hot spot, the spacing of lens is less simultaneously, can not cause occurring the problem that lenticular spacing is excessive in system zoom process, so leakage and the loss of infrared light are less, and the volume of complete machine has also obtained effective control.
Preferably, the infrared zooming illuminating apparatus corresponding with the method also comprises radiation intensity probe unit, and described method also comprises:
S30, radiation intensity probe unit detect the reflected light signal that illuminated object is reflected back, and send it to control module;
S40, control module generate the second control command according to this reflected light signal, and send it to infrared transmitter;
S50, infrared transmitter are adjusted the transmitting power of infrared light according to described the second control command.
Because the stepper motor using in the embodiment of the present invention can be by programme-control, therefore can under the control of control module, carry out the adjusting of focal length, required illuminated area is realized to zoom illumination, meet the lighting requirement of infrared Zoom camera when the different angles of visual field (focal length).
Complete after infrared zoom, infrared zoom lens control device reaches the lighting demand of infrared Zoom camera imaging angular aperture, after the reflection of part reverberation by plane of illumination, enter into radiation intensity probe unit, radiation intensity probe unit is surveyed this infra-red radiation emittance, export a level as radiation intensity signal to control module, control module is sampled to the amplitude of radiation intensity signal, in conjunction with required irradiation level on the shadow surface that in the focal length of camera information having had in control module and control module, memory has in advance, the signal amplitude obtaining to sampling compares, if the radiation intensity signal amplitude that real-time sampling obtains is greater than required irradiation level on the shadow surface that in control module, memory has in advance, control module reduces the transmitter driving signal power of infrared transmitter, make it to reduce the transmitting power of infrared transmitter, if the radiation intensity signal amplitude that real-time sampling obtains is less than required irradiation level on the shadow surface that in control module, memory has in advance, control module increases the transmitter driving signal power of infrared transmitter, makes it to increase the transmitting power of infrared transmitter.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (12)
1. an infrared zooming illuminating apparatus, is characterized in that, comprising:
Infrared transmitter, for launching infrared light;
Variable focus lens package, it comprises the zoom lens at least one transmitting primary optical axis that switches to infrared transmitter;
Lens switching mechanism, for being switched to corresponding variable focus lens package zoom lens according to the first control command of obtaining from control module the transmitting primary optical axis of infrared transmitter;
Control module, sends the first control command for the focusing instruction sending according to infrared Zoom camera to lens switching mechanism.
2. infrared zooming illuminating apparatus as claimed in claim 1, is characterized in that, also comprises:
Fixed lens, it is arranged on the transmitting primary optical axis of described infrared transmitter, and fixed lens is between infrared transmitter and variable focus lens package.
3. infrared zooming illuminating apparatus as claimed in claim 1, is characterized in that, the zoom lens of described variable focus lens package are fixedly arranged on a movable axis, and described zoom lens have the first driving cog;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the first driving cog of the zoom lens of variable focus lens package;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
4. infrared zooming illuminating apparatus as claimed in claim 1, it is characterized in that, the zoom lens of described variable focus lens package are fixedly arranged on a uni-drive gear box, described uni-drive gear box has at least one second driving cog of arranging side by side, and described uni-drive gear box is arranged on a fixing reach movably;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the second driving cog of uni-drive gear box;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
5. the infrared zooming illuminating apparatus as described in claim 3 or 4, it is characterized in that, the zoom lens of described variable focus lens package stagger and arrange and be fixedly arranged on a movable axis, and/or, the zoom lens of described variable focus lens package stagger and arrange and be fixedly arranged on a uni-drive gear box, and/or described travelling gear is sector gear, and described sector gear is arranged for staggering on described fixed axis.
6. infrared zooming illuminating apparatus as claimed in claim 1, is characterized in that, also comprises:
Radiation intensity probe unit, the reflected light signal being reflected back for detection of illuminated object, and send it to control module;
Described control module, further generates the second control command according to this reflected light signal, and sends it to infrared transmitter;
Described infrared transmitter, further described the second control command of foundation is adjusted the transmitting power of infrared light.
7. an infrared Zoom camera, is characterized in that, comprises the infrared zooming illuminating apparatus as described in claim as arbitrary in claim 1-6.
8. a control method for infrared zooming illuminating apparatus, is characterized in that, the infrared zooming illuminating apparatus corresponding with the method comprises infrared transmitter, variable focus lens package, lens switching mechanism and control module, and described method comprises:
Control module obtains the focusing instruction that infrared Zoom camera sends, and sends the first control command to lens switching mechanism accordingly;
Lens switching mechanism is switched to corresponding variable focus lens package zoom lens the transmitting primary optical axis of infrared transmitter according to the first control command of obtaining from control module;
Wherein, described infrared transmitter is used for launching infrared light; Described variable focus lens package, it comprises the zoom lens at least one transmitting primary optical axis that switches to infrared transmitter.
9. the control method of infrared zooming illuminating apparatus as claimed in claim 8, it is characterized in that, described infrared zooming illuminating apparatus also comprises fixed lens, and it is arranged on the transmitting primary optical axis of described infrared transmitter, and fixed lens is between infrared transmitter and variable focus lens package.
10. the control method of infrared zooming illuminating apparatus as claimed in claim 8, is characterized in that, the zoom lens of described variable focus lens package are fixedly arranged on a movable axis, and described zoom lens have the first driving cog;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the first driving cog of the zoom lens of variable focus lens package;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
The control method of 11. infrared zooming illuminating apparatus as claimed in claim 8, it is characterized in that, the zoom lens of described variable focus lens package are fixedly arranged on a uni-drive gear box, described uni-drive gear box has at least one second driving cog of arranging side by side, and described uni-drive gear box is arranged on a fixing reach movably;
Described lens switching mechanism comprises:
Driving gear set, it comprises that at least one is fixedly installed on travelling gear on a fixed axis and that can engage with the second driving cog of uni-drive gear box;
Stepper motor, for obtain the first control command from control module, and drives driving gear set accordingly, and wherein, described fixed axis is fixedly connected with the power transmission shaft of stepper motor.
The control method of 12. infrared zooming illuminating apparatus as claimed in claim 8, is characterized in that, the infrared zooming illuminating apparatus corresponding with the method also comprises radiation intensity probe unit, and described method also comprises:
Radiation intensity probe unit detects the reflected light signal that illuminated object is reflected back, and sends it to control module;
Control module generates the second control command according to this reflected light signal, and sends it to infrared transmitter;
Infrared transmitter is adjusted the transmitting power of infrared light according to described the second control command.
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| CN201210490991.7A CN103836450B (en) | 2012-11-27 | 2012-11-27 | Infrared zooming illuminating apparatus and control method, infrared Zoom camera |
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| DE202021102872U1 (en) | 2020-06-04 | 2021-06-15 | Saga Optics Co., Limited | Infrared zoom lighting device |
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| CN103836450B (en) | 2016-11-23 |
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