CN208548957U - A kind of video camera - Google Patents
A kind of video camera Download PDFInfo
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- CN208548957U CN208548957U CN201821245775.5U CN201821245775U CN208548957U CN 208548957 U CN208548957 U CN 208548957U CN 201821245775 U CN201821245775 U CN 201821245775U CN 208548957 U CN208548957 U CN 208548957U
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Abstract
The utility model embodiment discloses a kind of video camera, comprising: gradual filter, cutoff filter, optical filter control circuit, driver, camera lens, imaging sensor and mobile bracket；Camera lens is disposed with along the optical axis direction of video camera, moves bracket and imaging sensor, and gradual filter and cutoff filter are installed on mobile bracket, and optical filter control circuit is electrically connected with driver；Driver drives mobile bracket to be moved to first position, and for gradual filter between camera lens and imaging sensor, the high part of gradual filter transmitance is located at the lower section of optical axis；Driver drives mobile bracket to be moved to the second position, and cutoff filter is between camera lens and imaging sensor.In this way, it is just not in the position overexposure close apart from video camera that the light of the position close apart from video camera, which is weakened, and the problem of exposing, available clearly image are owed in the position remote apart from video camera in the case where headlamp is opened when video camera shooting image.
Description
Technical field
The utility model relates to camcorder technology field, in particular to a kind of video camera.
Background technique
Currently, it is very widely used using the video camera of night active illumination technology, it is widely used in face snap
Equal fields, are seen everywhere in daily life and each field of industrial production.
It is generally used cooperatively with visible illumination lamp or infrared illumination lamp using the video camera of night active illumination technology, this
Sample, in the case where the insufficient lights such as night, headlamp starts to illuminate, and provides better lighting condition for video camera shooting, with
Make to image the function clear face of shooting or other objects.
Headlamp is usually installed on same position with video camera, since range blanking lamp more dipped beam line is stronger, and apart from photograph
Bright lamp more distance light line is weaker, and therefore, when shooting, the position exposure closer apart from video camera is stronger, apart from video camera for video camera
Remoter position exposure is weaker, it may appear that the position overexposure close apart from video camera, and what the position remote apart from video camera owed to expose asks
Topic, is still unable to get clearly image.
Utility model content
The utility model embodiment is designed to provide a kind of video camera, the feelings opened to avoid video camera in headlamp
Appearance distance video camera close position overexposure when shooting image under condition, and the problem of exposing, is owed in the position remote apart from video camera.Technology
Scheme is as follows:
In a first aspect, the utility model embodiment provides a kind of video camera, the video camera include: gradual filter,
Cutoff filter, optical filter control circuit, driver, camera lens, imaging sensor and mobile bracket；
Along the optical axis direction of the video camera be disposed with the camera lens, it is described move bracket and described image sensing
Device, the gradual filter and the cutoff filter are installed on the mobile bracket, the optical filter control circuit with
The driver electrical connection；
The driver drives the mobile bracket to be moved to first position, the gradual filter be located at the camera lens and
Between described image sensor, the high part of the gradual filter transmitance is located at the lower section of the optical axis；
The driver drives the mobile bracket to be moved to the second position, and the cutoff filter is located at the mirror
Between head and described image sensor.
Optionally, the optical filter control circuit includes control chip and photo resistance；
The photo resistance is electrically connected with the control chip, and the control chip is electrically connected with the driver.
Optionally, the gradual filter includes first area, second area and third region from top to bottom；
The high part of the gradual filter transmitance is the first area, and the transmitance of the first area is
100%；
The transmitance of the second area is sequentially reduced from top to bottom, and the maximum value of the transmitance of the second area is
100%, the minimum value of the transmitance of the second area is 60%-30%；
The transmitance in the third region is sequentially reduced from top to bottom, and the maximum value of the transmitance in the third region is
60%-30%, the minimum value of the transmitance in the third region are 10%-5%.
Optionally, the material of the gradual filter is glass or plastics.
Optionally, the range of the absorbing wavelength of the gradual filter is 400 nanometers to 1500 nanometers.
Optionally, the driver is microelectronics motor or electromagnetic drive device.
Optionally, the electromagnetic drive device is solenoid valve.
Second aspect, the utility model embodiment provide another video camera, the video camera include gradual filter,
Imaging sensor and camera lens；
The camera lens, the gradual filter and described image sensing are disposed with along the optical axis direction of the video camera
Device；The high part of the gradual filter transmitance is located at the lower section of the optical axis.
Optionally, the gradual filter is associated with the transmitance of light with object distance, and the more big corresponding transmission of object distance
Rate is bigger.
The third aspect, the utility model embodiment provide another video camera, including gradual filter, image sensing
Device, camera lens, the gradual filter are set between described image sensor and the camera lens；
The camera lens, for allowing light to enter the video camera；
The gradual filter has different transmitances to light, and is used for the light for entering the video camera
Line is penetrated；
Described image sensor, for receiving the light of the transmission and generating image.
The utility model embodiment provides a kind of video camera, comprising: gradual filter, cutoff filter, optical filtering
Piece control circuit, driver, camera lens, imaging sensor and mobile bracket；Along the optical axis direction of video camera be disposed with camera lens,
Mobile bracket and imaging sensor, gradual filter and cutoff filter are installed on mobile bracket, optical filter control circuit
It is electrically connected with driver；Driver drives mobile bracket to be moved to first position, and gradual filter is located at camera lens and image sensing
Between device, the high part of gradual filter transmitance is located at the lower section of optical axis；Driver drives mobile bracket to be moved to second
It sets, cutoff filter is between camera lens and imaging sensor.Since the high part of gradual filter transmitance is located at light
The lower section of axis, in imaging, it corresponds to the position above optical axis, i.e., apart from video camera remote position in actual scene, then gradually
Become the top that the low part of optical filter transmitance is located at optical axis, it corresponds to the position below optical axis, i.e. actual scene in imaging
It is middle apart from the closer position of video camera.In this way, in the case where headlamp is opened when video camera shooting image, it is close apart from video camera
The light of position be weakened, be just not in the position overexposure close apart from video camera, and the position remote apart from video camera owes to expose
The problem of, available clearly image.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of schematic diagram of video camera photographed scene；
Fig. 2 is a kind of schematic diagram of the image of video camera shooting；
Fig. 3 is the structural schematic diagram of the first video camera provided by the utility model embodiment；
Fig. 4 is a kind of schematic diagram of gradual filter provided by the utility model embodiment；
Fig. 5 is the structural schematic diagram of second of video camera provided by the utility model embodiment；
Fig. 6 is the structural schematic diagram of the third video camera provided by the utility model embodiment.
Wherein, the corresponding relationship in Fig. 3 and Fig. 4 between each component Name and respective drawings label are as follows:
310 gradual filters, 320 cutoff filters, 330 optical filter control circuits, 340 drivers, 350 camera lenses,
360 imaging sensors, 370 mobile brackets, 410 first areas, 420 second areas, 430 third regions.
Corresponding relationship in Fig. 5 between each component Name and respective drawings label are as follows:
510 gradual filters, 520 camera lenses, 530 imaging sensors.
Corresponding relationship in Fig. 6 between each component Name and respective drawings label are as follows:
610 gradual filters, 620 camera lenses, 630 imaging sensors.
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, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
In order to solve video camera when headlamp is opened when shooting image, the position overexposure close apart from video camera of appearance,
And the problem of exposing, is owed in the position remote apart from video camera, to obtain clearly image, the utility model embodiment provides one kind and takes the photograph
Camera.
The first video camera provided by the utility model embodiment is introduced below.
Firstly, in order to be easier to understand a kind of structure and principle of video camera provided by the utility model embodiment, under
In face of the principle of video camera shooting image and the position overexposure close apart from video camera of appearance, and the position remote apart from video camera is owed
The reason of the problem of exposure, is introduced.
In order to take scene domain appropriate, the mounting height of video camera is generally greater than the height of ordinary people, and one
As video camera mounting height be 3-6 meters.As shown in Figure 1, the field range of the Range Representation video camera in figure in dotted line, simultaneously
And the illumination zone for the visible illumination lamp or infrared illumination lamp for cooperating video camera to use.Wherein, in order to be camera shooting
Machine shooting preferably provides shooting light, and the light angle of headlamp and the field angle of video camera are identical.
When the face being taken is remoter apart from video camera, then its range blanking lamp is also remoter, the unit plane being subject to
Long-pending intensity of illumination is weaker.When the face being taken is closer apart from video camera, then its range blanking lamp is also closer, by
The intensity of illumination of the unit area arrived is stronger.In Fig. 1 using the reference object of video camera be face as signal, then being taken
Face location A light intensity much stronger than the face B that is taken, and the face C that the face B ratio being taken is taken is by force
It is more.
Headlamp can be considered as single point light source, and the ratio between unit area intensity of illumination of different location is equal to itself and illumination
The distance of lamp square inverse ratio.That is, for the face a and face b that video camera can take, if face
A is L1 at a distance from headlamp, and face b is L2 at a distance from headlamp, then the intensity of illumination that face a and face b are received
Ratio then are as follows: L22: L12。
So, it is assumed that the distance of face A to video camera is 2m in Fig. 1, and the distance of face C to video camera is 10m, then face
The ratio for the intensity of illumination that A and face C are received then is 102: 22=100:4.According to the image-forming principle of video camera it is found that video camera
The image taken under scene shown in Fig. 1 can be with as shown in Fig. 2, face A is located at image bottom, face C be located at image most
Lower section.
In this case, it is over-exposed to tend to the face A occurred nearby, overexposure problem occurs, causes face thin
, there is deficient exposure problem, owe exposure and equally also result in facial detail missing in section missing, and the under-exposure of the face C of distant place.And
From figure 2 it can be seen that since the mounting height of video camera is generally greater than face height, the position of face A in the picture nearby
Set the face C of distant place to be significantly lower than.
Based on the principle of above-mentioned video camera shooting image and the reason of overexposure occur and owe the problem of exposing, the utility model is real
It applies example and provides a kind of video camera.
As shown in figure 3, a kind of video camera, the video camera include: gradual filter 310, cutoff filter 320,
Optical filter control circuit 330, driver 340, camera lens 350, imaging sensor 360 and mobile bracket 370；
The camera lens 350 is disposed with along the optical axis direction of the video camera, described moves bracket 370 and described image
Sensor 360, the gradual filter 310 and the cutoff filter 320 are installed on the mobile bracket 370, described
Optical filter control circuit 330 is electrically connected with the driver 340；
The driver 340 drives the mobile bracket 370 to be moved to first position, and the gradual filter 310 is located at
Between the camera lens 350 and described image sensor 360, the high part of 310 transmitance of gradual filter is located at the light
The lower section of axis；
The driver 340 drives the mobile bracket 370 to be moved to the second position, the cutoff filter 320
Between the camera lens 350 and described image sensor 360.
As it can be seen that the utility model embodiment provides a kind of video camera, comprising: gradual filter, cutoff filter,
Optical filter control circuit, driver, camera lens, imaging sensor and mobile bracket；Optical axis direction along video camera is disposed with
Camera lens, mobile bracket and imaging sensor, gradual filter and cutoff filter are installed on mobile bracket, optical filter control
Circuit is electrically connected with driver；Driver drives mobile bracket to be moved to first position, and gradual filter is located at camera lens and image
Between sensor, the high part of gradual filter transmitance is located at the lower section of optical axis；Driver drives mobile bracket to be moved to the
Two positions, cutoff filter is between camera lens and imaging sensor.Due to the high part position of gradual filter transmitance
In the lower section of optical axis, in imaging, it corresponds to the position above optical axis, i.e., apart from video camera remote position in actual scene, that
The low part of gradual filter transmitance is located at the top of optical axis, and in imaging, it corresponds to the position below optical axis, i.e., actually
Apart from the closer position of video camera in scene.In this way, in the case where headlamp is opened when video camera shooting image, distance camera shooting
The light of the close position of machine is weakened, and is just not in the position overexposure close apart from video camera, and the position remote apart from video camera
Owe the problem of exposing, available clearly image.
In above-mentioned video camera, camera lens 350 is disposed with along the optical axis direction of video camera, moves bracket 370 and image
Sensor 360, and gradual filter 310 and cutoff filter 320 are installed on mobile bracket 370.That is, imaging
When machine shoots image, light is injected from camera lens 350, then after gradual filter 310 or cutoff filter 320, is arrived
Up to imaging sensor 360, and then it is imaged.
In order to guarantee that the light for reaching imaging sensor 360 is entirely to pass through gradual filter 310 or IR cut filter
Piece 320, the area of general gradual filter 310 or IR cut filter needs equal to or slightly greater than imaging sensor 360
Photosensitive part area.It is understood that gradual filter 310 and IR cut filter and imaging sensor 360
Distance it is remoter, then by image-forming principle it is found that the area of gradual filter 310 and IR cut filter then need it is bigger.
Optical filter control circuit 330 is electrically connected with driver 340, can control driver 340, and then driver 340
Mobile bracket 370 can be driven mobile.Optical filter control circuit 330 can be the control electricity that can arbitrarily control driver 340
Road, for example, can be single-chip microcontroller etc..Driver 340 can be arbitrarily can be that mobile bracket 370 provides the driving portions such as driving force
Part is not specifically limited herein for example, can be microelectronics motor or electromagnetic drive device etc..
Mobile bracket 370 can be can arbitrarily to install gradual filter 310 and cutoff filter 320, and can
With the bracket of rotation.Its material can be metal, plastics etc., be not specifically limited herein.Gradual filter 310 and infrared cutoff
Optical filter 320 can be installed on mobile bracket 370 by modes such as card slot, stickups.
Mobile bracket 370 can have two gears, respectively correspond first position and the second position.When mobile bracket 370
When being moved to first position, gradual filter 310 is between camera lens 350 and imaging sensor 360, also, gradual filter
The high part of 310 transmitances is located at the lower section of optical axis, and the low part of 310 transmitance of gradual filter is located at the top of optical axis.And
When driver 340 drives mobile bracket 370 to be moved to the second position, cutoff filter 320 is located at camera lens 350 and image
Between sensor 360.
Wherein, cutoff filter 320 can filter infrared band, and infrared ray can be prevented to pass through imaging sensor
360 and cause image fault.Cutoff filter 320 can be used, so under the strong scene of daylight to keep away
Exempt to cause image fault.
Gradual filter 310 is the optical filter of transmitance gradual change, that is to say, that it is gradual change for the transmitance of light, can
To stop a part of light to pass through, and the transmitance of light is different.In above-mentioned video camera, the mobile branch of the driving of driver 340
When frame 370 is moved to first position, gradual filter 310 is between camera lens 350 and described image sensor 360, and gradual change
The high part of 310 transmitance of optical filter is located at the lower section of optical axis, by above-mentioned image-forming principle it is found that so gradual filter 310 is saturating
Cross the top that the high part of rate corresponds to the image of video camera acquisition.
Still by taking Fig. 2 as an example, then the top of the high part corresponding diagram 2 of 310 transmitance of gradual filter, and gradual change filters
The lower part of the low part corresponding diagram 2 of 310 transmitance of piece, then can so that video camera when shooting image, imaging sensor 360
The light received successively enhances from top to bottom, then since imaging sensor 360 is imaged as inverted image, the image of shooting from up to
Under corresponding light intensity successively weaken.Corresponding light intensity is then weakened at face A and at face B in so Fig. 2, and at face A pair
The light intensity answered is weakened the Weaken degree that degree is greater than the corresponding light intensity of face B.
In this way, headlamp is adjusted to satisfaction shooting light intensity at a distance, light nearby when video camera shoots image
It can be filtered out by gradual filter 310, also just solve the position overexposure close apart from video camera in this way, and it is remote apart from video camera
Position owe expose the problem of.
For example, in photographed scene shown in Fig. 1, when video camera shoots image in the case where the insufficient lights such as night,
Headlamp can be adjusted to the intensity that can obtain the clear image of face C, to guarantee the clarity of face C in image.
Optical filter control circuit 330 can control driver 340 and drive mobile bracket 370, and mobile bracket 370 turns to first position,
Between camera lens 350 and imaging sensor 360, light passes through gradual filter 310 and passes in image gradual filter 330 at this time
It is imaged in sensor 360.The high part of the transmitance of gradual filter 310 is located at the lower section of optical axis, in this way, correspond to face A and
Some light at face B is filtered 310 by gradual change to be stopped, and intensity of illumination reduces.At this point, the image of video camera shooting then will not
There is overexposure and owes the problem of exposing, the clear image of available face A-C.
And when ambient light meets shooting demand, such as when daytime, optical filter control circuit 330 then can control driving
Device 340 drives mobile bracket 370 to turn to the second position, and cutoff filter 320 is located at camera lens 350 and image sensing at this time
Between device 360, light passes through cutoff filter 320 and is irradiated to imaging sensor 360, and cutoff filter 320 can be with
Infrared band is filtered, prevents infrared ray from passing through imaging sensor 360 and cause image fault, obtains clear image.
It in one embodiment, can be strong using the automatic exposure gain circuitry detection ambient light in imaging sensor
Degree, the automatic exposure gain circuitry of imaging sensor can be electrically connected with the controller, and in turn, detect that light intensity reaches a certain threshold
When value, illustrate that illumination condition is preferable at this time, sends the first signal to controller, controller can control driver driving movement
Bracket is mobile, switches to cutoff filter.
Similarly, the automatic exposure gain circuitry of imaging sensor illustrates this when detecting light intensity lower than a certain threshold value
When light it is weaker, headlamp be usually open, then can send second signal to controller, controller can control driving
Device drives mobile bracket mobile, switches to gradual filter.
As a kind of embodiment of the utility model embodiment, above-mentioned optical filter control circuit may include control chip
And photo resistance；Photo resistance is electrically connected with control chip, and control chip is electrically connected with driver.
Since the switching of cutoff filter and gradual filter is related with light intensity, photosensitive electricity can be used
Resistance is used as sensor devices, to detect environment current light intensity.Photo resistance be usually with vulcanize every or selenizing every etc. partly lead
Resistor made of body material, illumination is stronger, and resistance value is just lower, and with the raising of intensity of illumination, resistance value is reduced rapidly.
In this way, with the variation of intensity of illumination, the resistance value of photo resistance changes in above-mentioned video camera, in turn,
Electric current in control circuit is caused to change, then control chip can detect curent change, in turn, control driver is driven
Dynamic mobile holder pivots, to switch cutoff filter and gradual filter.
In order to facilitate control driver, and guarantees when switching to cutoff filter that intensity of illumination can satisfy shooting and want
It asks, current threshold can be preset, which is current value when intensity of illumination can satisfy photographing request.
In this way, illustrating the resistance value decline of photo resistance, at this time intensity of illumination when electric current becomes larger and reaches the preset threshold
It is very strong, it can satisfy photographing request.So, control chip can control the mobile holder pivots of driver driving to second
Position, so that cutoff filter is between camera lens and imaging sensor.
When electric current becomes smaller lower than the preset threshold, illustrate that the resistance value of photo resistance rises, intensity of illumination has been at this time
Weaker, it is impossible to meet photographing requests.The headlamp of video camera is opened at this time.So, control chip can control driver
Drive mobile holder pivots to first position, so that gradual filter is between camera lens and imaging sensor.
As it can be seen that in the present embodiment, above-mentioned optical filter control circuit may include control chip and photo resistance, photosensitive electricity
Resistance is electrically connected with control chip, and control chip is electrically connected with driver.In this way, the resistance value of photo resistance becomes with intensity of illumination
Change, electric current in control circuit is caused to change, control chip can detecte the variation of electric current, in turn, according to curent change control
Driver processed drives mobile bracket, cutoff filter can be switched to camera lens in the case where the illumination such as daytime abundance
Between imaging sensor, in the case where the light such as night are not able to satisfy shooting needs, gradual filter is switched into camera lens
Between imaging sensor, it is able to solve the overexposure occurred when headlamp is opened and deficient exposure problem, it is clear to guarantee that shooting obtains
Image.
As a kind of embodiment of the utility model embodiment, above-mentioned video camera can also include headlamp and headlamp
Control circuit, headlamp are electrically connected with lighting lamp control circuit, and lighting lamp control circuit is electrically connected with optical filter control circuit.
In order to guarantee that enough intensities of illumination can be provided in the insufficient situation of the illumination such as night to shoot for video camera, and
It conveniently installs and uses, headlamp can be installed on video camera, that is to say, that above-mentioned video camera may include headlamp and headlamp
Control circuit, the headlamp are electrically connected with lighting lamp control circuit, lighting lamp control circuit be used for control headlamp unlatching or
It closes.
It is used to control the concrete mode that headlamp opens or closes for lighting lamp control circuit, the relevant technologies can be used
In any way realize that for example, the period can be preset, headlamp is opened during this period of time.For example, extremely at 19 points
Headlamp etc. is opened in 6 this periods of next day, is not specifically limited herein.
So since gradual filter is usually to use when headlamp is opened, so in order to more convenient and accurately
Control driver drives mobile holder pivots to first position when headlamp is opened, and lighting lamp control circuit can be with optical filter
Control circuit electrical connection.
In this way, open signal can be sent to optical filter control circuit when lighting lamp control circuit opens headlamp.Filter
Mating plate control circuit can control driver and drive mobile holder pivots to first position after receiving the open signal,
So that gradual filter is between camera lens and imaging sensor.
When lighting lamp control circuit closes headlamp, shutdown signal can be sent to optical filter control circuit.Optical filter
Control circuit can control driver and drive mobile holder pivots to the second position after receiving the shutdown signal, so that
Cutoff filter is between camera lens and imaging sensor.
As it can be seen that in embodiment, video camera can also include headlamp and lighting lamp control circuit, headlamp and headlamp
Control circuit electrical connection, lighting lamp control circuit is electrically connected with optical filter control circuit, and such optical filter control circuit can be with
The linkage of lighting lamp control circuit, when headlamp opens and closes, optical filter control circuit controls driver and drives mobile bracket
First position or the second position are turned to, to achieve the purpose that switch optical filter, can be convenient and accurately switch optical filter.
As a kind of embodiment of the utility model embodiment, as shown in figure 4, above-mentioned gradual filter from top to bottom may be used
To include first area 410, second area 420 and third region 430.
The high part of gradual filter transmitance is the first area 410, and the transmitance of first area 410 is generally
100%, the transmitance of second area 420 is sequentially reduced from top to bottom, and the maximum value of the transmitance of second area 420 can be
100%, the minimum value of the transmitance of second area 420 can be 60%-30%, and the transmitance in third region 430 is from top to bottom
It is sequentially reduced, the maximum value of the transmitance in third region 430 can be 60%-30%, the minimum of the transmitance in third region 430
Value can be 10%-5%.
Wherein, the high part of gradual filter transmitance is first area 410, as above-mentioned below camera optical axis
Part.The size of first area 410, second area 420 and third region 430 can be equal, can also be unequal, specific to divide
It can be determined according to factors such as the practical service environment light of video camera, be not specifically limited herein.
The transmitance in second area 420 and third region 430 can also according to the practical service environment light of video camera, take the photograph
The factors such as the gamma curve of camera determine, are also not specifically limited herein.The maximum value of the transmitance of second area 420 can be
100%, minimum value can be 60%-30%, and the maximum value of the transmitance in third region 430 can be 60%-30%, minimum value
When can be 10%-5%, the demand of most usage scenarios can satisfy.
In one embodiment, the transmitance of the first area of gradual filter is 100%, that is to say, that light can be with
Completely through.The transmitance in second area and third region can be even variation from top to bottom.For example, second area is saturating
The rate of mistake can be the even variation from 100% to 30%, and the transmitance in third region can be the even variation from 30% to 5%.
It should be noted that gradual filter shown in Fig. 4 can only use gradually in the embodiment of the utility model
Become optical filter a kind of schematic diagram, shape, size and first area 410, second area 420, third region 430 size
Deng being a kind of signal, can not indicate must be using gradual filter shown in Fig. 4, not in the embodiment of the utility model
The restriction to the gradual filter in the utility model can be constituted.
As it can be seen that in embodiment, above-mentioned gradual filter may include three regions from top to bottom, i.e. first area,
Two regions and third region.The high part of gradual filter transmitance is the first area, and the transmitance of first area is general
It is 100%, the transmitance of second area is sequentially reduced from top to bottom, and the maximum value of transmitance can be 100%, and minimum value can be with
Transmitance for 60%-30%, third region is sequentially reduced from top to bottom, and the maximum value of transmitance can be 60%-30%, most
Small value can be 10%-5%.Such gradual filter can satisfy the needs of most usage scenarios, be able to solve
The overexposure and owe the problem of exposing that headlamp occurs when opening, video camera can shoot to obtain clearly image.
As a kind of embodiment of the utility model embodiment, the material of above-mentioned gradual filter can be glass or modeling
Material.Gradual filter can make to obtain by way of the plated film on base material, base material i.e. gradual filter
Material can be glass or plastics.
In the usage scenarios of less demanding such as clarity to shooting picture, type that can be more cheap using price
Glass, plastic or other material, the cost of gradual filter drops as far as possible under the premise ofs meeting adaption demand etc..And for shooting picture
The more demanding usage scenario such as clarity in, the glass or plastic production of the higher more accurate type of price can be used
Gradual filter, to guarantee to satisfy the use demand.
Since video camera is generally used in the general scene in life, and the wave-length coverage of the houselights of general illumination lamp
For complete wavelength range, i.e., 400 nanometers to 1500 nanometers, so the absorbing wavelength of gradual filter may range from 400 nanometers
To 1500 nanometers, to guarantee that the mistake occurred when video camera shooting can be better solved with the houselights of uniform pickup headlamp
Exposure and deficient exposure problem, so that the image that shooting obtains is more clear.
As a kind of embodiment of the utility model embodiment, above-mentioned driver can drive for microelectronics motor or electromagnetism
Dynamic device.
Wherein, microelectronics motor volume is smaller, is suitably applied in video camera, specifically can using single flow, AC system,
From state angie type, step-by-step movement, mobile microelectronics motor etc., as long as mobile holder pivots can be driven, do not do herein specific
It limits.
Microelectronics motor can connect with the rotation axis etc. of mobile bracket, can specifically be welded, rivet, being threadedly coupled etc. just
Formula is not specifically limited herein as long as microelectronics motor can be connect with mobile bracket.
In this way, mobile bracket can be driven to carry out turning under control of the optical filter driver by control circuit
One position or the second position, and then realize the switching of cutoff filter and gradual filter.
Above-mentioned electromagnetic drive device can be then the devices such as solenoid valve, wherein solenoid valve can be direct acting diaphragm structure, divide
Walk direct acting diaphragm structure, pilot diaphragm structure, direct acting piston structure etc..It is not specifically limited herein.
Solenoid valve generally comprises valve seat, electromagnetic coil, electromagnetic valve body and spring, and electromagnetic valve body can be with turn of mobile bracket
The connection such as moving axis, the modes such as can specifically weld, rivet, being threadedly coupled, as long as electromagnetic valve body can be connect i.e. with bracket is moved
Can, it is not specifically limited herein.
In this way, electromagnetic coil generates electromagnetic force for electromagnetic valve body from valve when filter plate control circuit controls solenoid valves
Lift on seat, electromagnetic valve body drives mobile holder pivots to first position or the second position；Filter plate control circuit controls electromagnetism
When valve powers off, the electromagnetic force that electromagnetic coil generates disappears, and electromagnetic valve body is pressed on valve seat by spring, and in turn, electromagnetic valve body drives
Holder pivots are moved to first position or the second position.Also cutting for cutoff filter and gradual filter can be realized
It changes.
As it can be seen that in the present embodiment, driver can be microelectronics motor or electromagnetic drive device etc., can be convenient and
It is accurately realized the switching of cutoff filter and gradual filter, solved the overexposure occurred when headlamp is opened and owes to expose
Problem.
Second of video camera provided by the utility model embodiment is introduced below.
As shown in figure 5, a kind of video camera, the video camera includes gradual filter 510, imaging sensor 530 and camera lens
520；
The camera lens 520, the gradual filter 510 and the figure are disposed with along the optical axis direction of the video camera
As sensor 530；The high part of 510 transmitance of gradual filter is located at the lower section of the optical axis.
As it can be seen that the utility model embodiment provides a kind of video camera, comprising: gradual filter, camera lens and image sensing
Device is disposed with camera lens, gradual filter and imaging sensor along the optical axis direction of video camera, and gradual filter transmitance is high
Part be located at the lower section of optical axis.Since the high part of gradual filter transmitance is located at the lower section of optical axis, in imaging, its is right
The position above optical axis is answered, i.e., apart from video camera remote position in actual scene, then the portion that gradual filter transmitance is low
Quartile is in the top of optical axis, and in imaging, it corresponds to the position below optical axis, i.e., apart from the closer position of video camera in actual scene
It sets.In this way, the light of the position close apart from video camera is weakened in the case where headlamp is opened when video camera shooting image,
It just is not in the position overexposure close apart from video camera, and the position remote apart from video camera is owed the problem of exposing, it is available clear
Image.
As a kind of embodiment of the utility model, above-mentioned gradual filter is associated with the transmitance of light with object distance,
And the more big corresponding transmitance of object distance is bigger.
That is, object is remoter at a distance from video camera, the transmitance of corresponding gradual filter part is bigger.By
Above-mentioned video camera imaging principle it is found that object is remoter at a distance from video camera, position in the picture closer to top, then
Since imaging sensor is imaged as inverted image, thus in order to allow distant place object intensity of illumination it is stronger, therefore, corresponding gradual change
The transmitance of filter portion needs bigger.
As a kind of embodiment of the utility model, above-mentioned gradual filter may include from top to bottom first area,
Second area and third region；
The high part of the gradual filter transmitance is the first area, and the transmitance of the first area is
100%；
The transmitance of the second area is sequentially reduced from top to bottom, and the maximum value of the transmitance of the second area is
100%, the minimum value of the transmitance of the second area is 60%-30%；
The transmitance in the third region is sequentially reduced from top to bottom, and the maximum value of the transmitance in the third region is
60%-30%, the minimum value of the transmitance in the third region are 10%-5%.
As a kind of embodiment of the utility model, the material of above-mentioned gradual filter can be glass or plastics.
As a kind of embodiment of the utility model, the absorbing wavelength of above-mentioned gradual filter may range from 400
Nanometer is to 1500 nanometers.
The third video camera provided by the utility model embodiment is introduced below.
As shown in fig. 6, a kind of video camera, including gradual filter 610, imaging sensor 630, camera lens 620, the gradual change
Optical filter 610 is set between described image sensor 630 and the camera lens 620；
The camera lens 620, for allowing light to enter the video camera；
The gradual filter 610 has different transmitances to light, and is used for the entrance video camera
Light is penetrated；
Described image sensor 630, for receiving the light of the transmission and generating image.
As it can be seen that the utility model embodiment provides a kind of video camera, comprising: gradual filter, camera lens and image sensing
Device, gradual filter are set between imaging sensor and camera lens, and camera lens is for allowing light to enter the video camera, gradual change filter
Mating plate has different transmitances to light, and be used to penetrate the light for entering video camera, and imaging sensor is used
In the light for receiving transmission and generate image.Since there is different transmitances to light, in this way, by gradual filter transmitance
High part is set in the lower section of the optical axis of video camera, then in the case where headlamp is opened when video camera shooting image,
The light of the position close apart from video camera is weakened, and is just not in the position overexposure close apart from video camera, and apart from video camera
Owe the problem of exposing, available clearly image in remote position.
As a kind of embodiment of the utility model, the light transmittance of the upper part of above-mentioned gradual filter lower than it is described gradually
Become the light transmittance of the lower part of optical filter.
Wherein, the upper part and lower part of gradual filter be corresponding video camera official continent for, that is to say, that gradual change
The high part of optical filter transmitance is set in the lower section of the optical axis of video camera, and the low part of gradual filter transmitance is set to
In the top of the optical axis of video camera.
As a kind of embodiment of the utility model, above-mentioned gradual filter is associated with the transmitance of light with object distance,
And the more big corresponding transmitance of object distance is bigger.
As a kind of embodiment of the utility model, above-mentioned gradual filter may include from top to bottom first area,
Second area and third region；
The high part of the gradual filter transmitance is the first area, and the transmitance of the first area is
100%；
The transmitance of the second area is sequentially reduced from top to bottom, and the maximum value of the transmitance of the second area is
100%, the minimum value of the transmitance of the second area is 60%-30%；
The transmitance in the third region is sequentially reduced from top to bottom, and the maximum value of the transmitance in the third region is
60%-30%, the minimum value of the transmitance in the third region are 10%-5%.
As a kind of embodiment of the utility model, the material of above-mentioned gradual filter can be glass or plastics.
As a kind of embodiment of the utility model, the absorbing wavelength of above-mentioned gradual filter may range from 400
Nanometer is to 1500 nanometers.
It should be noted that for above-mentioned second of video camera and the third video camera embodiment, since it is basic
It is similar to the first video camera embodiment, so being described relatively simple, image-forming principle, explanation and phase for each component
Place is closed to illustrate referring to the part of the first video camera embodiment.
It should be further noted that herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.
The above is only the preferred embodiment of the utility model only, is not intended to limit the protection model of the utility model
It encloses.Any modification, equivalent substitution, improvement and etc. made within the spirit and principle of the present invention, are all contained in this reality
With in novel protection scope.
Claims (10)
1. a kind of video camera, which is characterized in that the video camera includes: gradual filter, cutoff filter, optical filter control
Circuit, driver, camera lens, imaging sensor and mobile bracket processed；
The camera lens is disposed with along the optical axis direction of the video camera, described moves bracket and described image sensor, institute
It states gradual filter and the cutoff filter is installed on the mobile bracket, the optical filter control circuit and the drive
Dynamic device electrical connection；
The driver drives the mobile bracket to be moved to first position, and the gradual filter is located at the camera lens and described
Between imaging sensor, the high part of the gradual filter transmitance is located at the lower section of the optical axis；
The driver drives the mobile bracket to be moved to the second position, the cutoff filter be located at the camera lens and
Between described image sensor.
2. video camera as described in claim 1, which is characterized in that the optical filter control circuit includes control chip and photosensitive
Resistance；
The photo resistance is electrically connected with the control chip, and the control chip is electrically connected with the driver.
3. video camera as described in claim 1, which is characterized in that the driver is microelectronics motor or electromagnetic driver
Part.
4. video camera as claimed in claim 3, which is characterized in that the electromagnetic drive device is solenoid valve.
5. a kind of video camera, which is characterized in that the video camera includes gradual filter, imaging sensor and camera lens；
The camera lens, the gradual filter and described image sensor are disposed with along the optical axis direction of the video camera；
The high part of the gradual filter transmitance is located at the lower section of the optical axis.
6. video camera as claimed in claim 5, which is characterized in that the gradual filter closes the transmitance and object distance of light
Connection, and the more big corresponding transmitance of object distance is bigger.
7. video camera as claimed in claim 6, which is characterized in that the gradual filter include from top to bottom first area,
Second area and third region；
The high part of the gradual filter transmitance is the first area, and the transmitance of the first area is 100%；
The transmitance of the second area is sequentially reduced from top to bottom, and the maximum value of the transmitance of the second area is 100%,
The minimum value of the transmitance of the second area is 60%-30%；
The transmitance in the third region is sequentially reduced from top to bottom, and the maximum value of the transmitance in the third region is 60%-
30%, the minimum value of the transmitance in the third region is 10%-5%.
8. video camera as claimed in claim 7, which is characterized in that the material of the gradual filter is glass or plastics.
9. video camera as claimed in claim 7, which is characterized in that the range of the absorbing wavelength of the gradual filter is 400
Nanometer is to 1500 nanometers.
10. a kind of video camera, which is characterized in that including gradual filter, imaging sensor, camera lens, the gradual filter is set
It is placed between described image sensor and the camera lens；
The camera lens, for allowing light to enter the video camera；
The gradual filter, to light have different transmitances, and be used for enter the video camera light into
Row penetrates；
Described image sensor, for receiving the light of the transmission and generating image.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821245775.5U CN208548957U (en) | 2018-08-03 | 2018-08-03 | A kind of video camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821245775.5U CN208548957U (en) | 2018-08-03 | 2018-08-03 | A kind of video camera |
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| CN208548957U true CN208548957U (en) | 2019-02-26 |
Family
ID=65425865
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110913113A (en) * | 2019-12-27 | 2020-03-24 | 维沃移动通信有限公司 | Shooting module and electronic equipment |
| CN110966952A (en) * | 2019-11-28 | 2020-04-07 | 西安联创兴科测控科技有限公司 | Remote online monitoring and early warning device and method for large-scale structure |
| CN111314594A (en) * | 2020-03-19 | 2020-06-19 | 闻泰通讯股份有限公司 | Camera module, control method and device, electronic equipment and storage medium |
| CN115086514A (en) * | 2021-03-15 | 2022-09-20 | 安讯士有限公司 | Apparatus for evaluating ambient light in a video camera |
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2018
- 2018-08-03 CN CN201821245775.5U patent/CN208548957U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966952A (en) * | 2019-11-28 | 2020-04-07 | 西安联创兴科测控科技有限公司 | Remote online monitoring and early warning device and method for large-scale structure |
| CN110966952B (en) * | 2019-11-28 | 2022-03-11 | 西安联创兴科测控科技有限公司 | Remote online monitoring and early warning method for large-scale structure |
| CN110913113A (en) * | 2019-12-27 | 2020-03-24 | 维沃移动通信有限公司 | Shooting module and electronic equipment |
| CN110913113B (en) * | 2019-12-27 | 2022-01-04 | 维沃移动通信有限公司 | Shooting module and electronic equipment |
| CN111314594A (en) * | 2020-03-19 | 2020-06-19 | 闻泰通讯股份有限公司 | Camera module, control method and device, electronic equipment and storage medium |
| CN115086514A (en) * | 2021-03-15 | 2022-09-20 | 安讯士有限公司 | Apparatus for evaluating ambient light in a video camera |
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