CN109297592A - A kind of method and relevant apparatus of stabilized light source - Google Patents
A kind of method and relevant apparatus of stabilized light source Download PDFInfo
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- CN109297592A CN109297592A CN201811354103.2A CN201811354103A CN109297592A CN 109297592 A CN109297592 A CN 109297592A CN 201811354103 A CN201811354103 A CN 201811354103A CN 109297592 A CN109297592 A CN 109297592A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
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Abstract
The present invention discloses the method and relevant apparatus of a kind of stabilized light source, and this method obtains the light intensity value of light source first；Thereafter, according to the light intensity value, stablize the light source using the DC component of the driving signal of the light source, wherein the light source is modulated by the AC compounent of the driving signal.Because being modulated by AC compounent, the amplitude of light source intensity and AC compounent is positively correlated.Simultaneously because driving signal DC component is negatively correlated with AC compounent, therefore the present invention can realize the control to light source intensity by adjusting driving signal DC component.And by ambient temperature effect, spectrum also drifts about when temperature changes, and the DC component by adjusting driving signal also can effectively inhibit the spectral drift of light source, the i.e. spectrum of stabilized light source.As it can be seen that influenced by factors such as environment temperatures when light source, when light intensity and/or unstable spectral characteristic, the stability of light source can be improved using driving signal DC component, further increase the accuracy of optical detection result.
Description
Technical field
This application involves optical technical fields, more particularly to the method and relevant apparatus of a kind of stabilized light source.
Background technique
Light source is the important component in optical detection application.Many optical detections are modulated using needs by AC signal
Light source, such as the atmospheric transmission instrument of atmospheric sounding visibility, transmission-type black and white densitometer etc..
However, being affected by the ambient temperature since the light intensity of light source and spectral characteristic etc. are easy, thus work as the ring of light source
When border temperature changes, the light intensity and spectral characteristic of light source can correspondingly change.It is used in optical detection application
Instrument and equipment is often very accurate, the detecting element in these instrument and equipments, such as photodiode etc., generally for connecing
The light received has stronger sensitivity.Therefore, when the light intensity of light source and/or spectral characteristic are affected by the ambient temperature and
When changing, the error that greatly may cause detecting element institute detection result is increased.
It can be seen that the accuracy of the de-stabilising effect optical detection result of light source.Therefore, the stabilization of light source how is improved
Property, and then the accuracy of optical detection result is improved, have become those skilled in the art's technical problem urgently to be solved.
Summary of the invention
Based on the above issues, this application provides a kind of method of stabilized light source and relevant apparatus, to solve light stability
Property insufficient problem.
The embodiment of the present application discloses following technical solution:
In a first aspect, the application provides a kind of method of stabilized light source, comprising:
Obtain the light intensity value of light source；
According to the light intensity value, stablize the light source using the DC component of the driving signal of the light source, wherein described
Light source is modulated by the AC compounent of the driving signal.
Optionally, the light intensity value for obtaining light source, specifically includes:
It detects to obtain the light intensity value of the light source using optical detection device；
It is described according to the light intensity value, stablize the light source using the DC component of the driving signal of the light source, specifically
Include:
The light intensity value is compared with light intensity preset value, if the light intensity value is greater than the light intensity preset value,
Raise the DC component of the driving signal of the light source；If the light intensity value be less than the light intensity preset value, lower described in
The DC component of driving signal.
Optionally, it is described the light intensity value is compared with light intensity preset value before, the method also includes:
Temperature correction is carried out to the light intensity value.
Optionally, described that temperature correction is carried out to the light intensity value, it specifically includes:
Obtain detection result of the optical detection device under transformation temperature；
The correction relationship formula of the optical detection device is obtained according to the temperature and the detection result；
Temperature correction is carried out to the light intensity value using the correction relationship formula.
Optionally, the light intensity preset value is the light after the preset number correction of the optical detection device in preset time
The average value of intensity values.
Optionally, the rated power of the light source is not less than two times of the actual demand power of the light source.
Optionally, the light source is the light source by aging process.
Second aspect, the application provide a kind of device of stabilized light source, comprising:
Light intensity acquisition module, for obtaining the light intensity value of light source；
Light stability module, for according to the light intensity value, the DC component using the driving signal of the light source to be stablized
The light source, wherein the light source is modulated by the AC compounent of the driving signal.
Optionally, the light intensity acquisition module, specifically includes:
First acquisition unit obtains the light intensity value of the light source for detecting using optical detection device；
The light stability module, specifically includes:
First stablizes unit, for the light intensity value to be compared with light intensity preset value, if the light intensity value is greater than
The light intensity preset value, then raise the DC component of the driving signal of the light source；If the light intensity value is less than the light intensity
Preset value then lowers the DC component of the driving signal.
Optionally, the light stability module further include:
Light intensity correction unit, for carrying out temperature correction to the light intensity value.
Optionally, the light intensity correction unit is specifically used for obtaining detection knot of the optical detection device under transformation temperature
Fruit；The correction relationship formula of the optical detection device is obtained according to the temperature and the detection result；Utilize the correction relationship
Formula carries out temperature correction to the light intensity value.
Optionally, the light intensity preset value is the light after the preset number correction of the optical detection device in preset time
The average value of intensity values.
Compared to the prior art, the application has the advantages that
The method of stabilized light source provided by the present application obtains the light intensity value of light source first；Thereafter, according to the light intensity value,
Stablize the light source using the DC component of the driving signal of the light source, wherein friendship of the light source by the driving signal
Flow component modulation.
Because being driven the AC compounent modulation of signal, the light intensity of light source and the amplitude of AC compounent are positively correlated.
Simultaneously as the DC component of driving signal is negatively correlated with AC compounent, therefore this method is by adjusting the straight of driving signal
Flow component can be realized the control to light source intensity.Moreover, by ambient temperature effect, when temperature changes, light source intensity
It changes, spectrum also drifts about, and the DC component by adjusting driving signal also can effectively inhibit the spectrum of light source to float
It moves, i.e. the spectrum of stabilized light source.
It can be seen that is influenced by factors such as environment temperatures when light source, when light intensity and/or unstable spectral characteristic, utilization
The stability of light source can be improved in the DC component of driving signal.Further, this method is correspondinglyd increase by stabilized light source
The accuracy of optical detection result.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the flow chart of the method for the stabilized light source that the application first embodiment provides；
Fig. 2 is the flow chart of the method for the stabilized light source that the application second embodiment provides；
Fig. 3 is that a kind of structure of the device for acquisition light source light intensity values that the application second embodiment provides disassembles schematic diagram；
Fig. 4 is a kind of three-dimensional view for correction relationship acquisition device that the application second embodiment provides；
Fig. 5 is the transmitting terminal temperature curve and transmitting terminal light source letter when control transmitting terminal temperature is constant in 75 hour time
Number curve synoptic diagram；
Fig. 6 is the temperature variation curve and receiving end signal curve of receiving end in 75 hour time；
Fig. 7 is a kind of variation relation for detection result change rate amount of varying with temperature that the application second embodiment provides
Figure；
Fig. 8 is the temperature curve of transmitting terminal and the signal curve schematic diagram of transmitting terminal in 180 hour time；
Fig. 9 is the structural schematic diagram of the device for the stabilized light source that the application 3rd embodiment provides.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Based on described previously, the accuracy of the de-stabilising effect optical detection result of light source.Inventor is to solve this problem, right
The situation of change that light source characteristic is affected by temperature is studied.It finds after study, when the environment temperature of light source increases, inspection
The light intensity value of the light source measured reduces, the direction drift that spectrum increases to wavelength；And when the environment temperature of light source reduces, detection
The light intensity value of the light source arrived increases, the direction drift that spectrum reduces to wavelength.By research, inventor be also found, when light source
When the DC component of driving signal increases, the ac signal amplitude that will lead in light source intensity reduces；And when DC component subtracts
Hour, the ac signal amplitude that will lead in light source intensity increases.Based on above the study found that inventor mentions in the application
The DC component of the driving signal of light source is utilized according to the light intensity value of light source for the method and relevant apparatus of a kind of stabilized light source
Stabilized light source, and then improve the accuracy of optical detection result.
It is illustrated below with reference to specific implementation of the embodiment and attached drawing to technical scheme.
First embodiment
Referring to Fig. 1, which is a kind of flow chart of the method for stabilized light source provided by the embodiments of the present application.
As shown in Figure 1, the method for stabilized light source provided in this embodiment, comprising:
Step 101: obtaining the light intensity value of light source.
In the present embodiment, light source can be light emitting diode (light-emitting diode, LED), and light source is driven
The AC compounent of signal is modulated.As an example, AC compounent can be sine wave, square wave, sawtooth wave etc..
The light intensity value of light source can be obtained by many modes, for example, the light that the biggish radiation of light source of radiation angle is gone out
Convergence is a branch of directive optical detection device, after electric current converted light energy by optical detection device, according to the width of the electric signal of acquisition
Spend the light intensity value for determining light source.It is, of course, understood that aforesaid way is only an example side for obtaining light source light intensity values
Formula, in the present embodiment, for obtain light source light intensity value concrete mode without limit.
Step 102: according to the light intensity value, stablizing the light source using the DC component of the driving signal of the light source.
When the environment temperature of light source rises, light intensity reduces；Light source when the temperature drops, light intensity increase.Light source is driven
The modulation of AC compounent in signal, when the DC component of the driving signal of light source increases, since AC compounent can reduce therewith,
So light intensity can also correspondingly reduce；When the DC component of the driving signal of light source reduces, since AC compounent can increase therewith
Greatly, so light intensity can also increase accordingly.Therefore, the method for stabilized light source provided in this embodiment can work as the light intensity value of light source
When smaller, AC compounent is improved by lowering the DC component of driving signal, and then improve the light intensity of light source；When the light of light source
When intensity values are larger, AC compounent is reduced by raising the DC component of driving signal, and then reduce light intensity.With this, stablize light
The light intensity in source.It is steady in the DC component of the driving signal according to light intensity value and utilization light source as a kind of possible implementation
When determining light source, can be determined by the way of being compared light intensity value with light intensity preset value light source light intensity values it is larger or compared with
It is small.
As alternatively possible implementation, can also according to the situation of change of the light intensity value in a certain preset time,
It determines the variation tendency that light intensity value increaseds or decreases, is then adaptively adjusted according to this variation tendency straight in driving signal
Flow component carrys out stabilized light source.Persistently increase for example, working as light intensity value in preset time, then raises the DC component of driving signal to drop
Low AC compounent, and then reduce the light intensity of light source；When light intensity value persistently reduces in preset time, then the direct current of driving signal is lowered
Component improves AC compounent, and then improves the light intensity of light source.With this, the light intensity of stabilized light source.
It is above the method for stabilized light source provided by the embodiments of the present application.As can be seen from the above description, the application provides
Stabilized light source method, first obtain light source light intensity value；Thereafter, according to the light intensity value, the driving of the light source is utilized
The DC component of signal stablizes the light source, wherein the light source is modulated by the AC compounent of the driving signal.
Because being driven the AC compounent modulation of signal, the light intensity of light source and the amplitude of AC compounent are positively correlated.
Simultaneously as the DC component of driving signal is negatively correlated with AC compounent, therefore this method is by adjusting the straight of driving signal
Flow component can be realized the control to light source intensity.Moreover, by ambient temperature effect, when temperature changes, light source intensity
It changes, spectrum also drifts about, and the DC component by adjusting driving signal also can effectively inhibit the spectrum of light source to float
It moves, i.e. the spectrum of stabilized light source.
It can be seen that is influenced by factors such as environment temperatures when light source, when light intensity and/or unstable spectral characteristic, utilization
The stability of light source can be improved in the DC component of driving signal.Further, this method provided in this embodiment passes through stabilization
Light source has correspondinglyd increase the accuracy of optical detection result.
It is understood that when obtaining the light intensity value of light source, it usually needs using the light of optical detection device probe source
By force, such as photodiode, photomultiplier tube etc..But the detectivity of optical detection device is equally also easy by environment
The influence of temperature, leading to detection result and actual value, there are deviations.If be not corrected light intensity value, it is difficult to obtain preferable
Light stability effect.Therefore, the application is the stablizing effect for guaranteeing light source, controls variable quantity influenced by ambient temperature,
To the detection result of optical detection device, that is, the light intensity value of the light source detected carries out temperature correction.Below with reference to embodiment and attached
The method of the stabilized light source is described in detail in figure.
Second embodiment
Referring to fig. 2, which is the flow chart of the method for another stabilized light source provided by the present application.
As shown in Fig. 2, the method for stabilized light source provided in this embodiment, comprising:
Step 201: detecting to obtain the light intensity value of the light source using optical detection device.
In the present embodiment, the rated power of the light source of selection is not less than the actual demand power of light source.For example, light source is specified
Power is greater than or equal to two times of light source actual demand power.
In addition, light source can also first pass through aging process in advance.A kind of specific implementation of aging process is provided below: by light
Source is placed in the maximum environmental temperature of light source permission, and the maximum current drive light source allowed using light source is worked 48 hours.When
So, the merely illustrative mode of which can also be the aging for realizing light source by other various ways in a particular application.
Referring to Fig. 3, Fig. 3 is that a kind of structure of device for obtaining light source light intensity values provided in this embodiment disassembles schematic diagram.
This step can specifically obtain the light intensity of light source using the device acquisition of Fig. 3.
Various components shown in Fig. 3 can be assembled into one.Multiple through-holes 302 are had on pedestal 301, pedestal 301 is used
In fixed whole device, through-hole 302 is for assembling fixed drive circuit board and light source.Beam uniformity component 303 has one
According to the tapered light channels that radiation of light source angle is designed, the inner surface frosted of beam uniformity component or it is equipped with screw thread, this non-light
The sliding reflection designed for reducing light, reduces the influence to optical detection result.Close to sources, taper are leaned in the top of tapered light channels
The bottom end of optical channel is far from light source.Meanwhile in the bottom end of 303 tapered light channels of beam uniformity component or eyeglass fixed part
Part 304 is close to the also mountable frosted glass in the side of beam uniformity component, and for breaing up light beam, the light beam for issuing light source is rear
It is more uniform in continuous optical path.
Along the direction of radiation of light source beam axis, the position close to tapered light channels bottom end is provided with and can fill the device
The eyeglass fixation member 304 of embedding beam splitter 305.Eyeglass fixation member 304 is equipped with along radiation of light source beam axis direction
One through-hole, the light outgoing for transmiting beam splitter 305 for installing lens 306；Meanwhile eyeglass fixation member 304 is from its center
To its side, i.e., the second through-hole is equipped on the reflected light path direction of beam splitter 305, the second through-hole is for installing optical filtering fixed part
Part 307.For optical filtering fixation member 307 for fixing filter or optical filter, human eye can be difficult to the light responded by filter or optical filter
It absorbs and filters, transmits the light that human eye can respond, and then connect the light of the optical detection device detection of collecting circuit board 308 thereon more
The response of person of modern times's eye.Collecting circuit board 308 is located at 304 side of eyeglass fixation member, thereon comprising optical detection device and across foot
Amplifier, when collecting circuit board 308 is fixed in eyeglass fixation member 304, optical detection device can be probeed into the second through-hole.
It should be noted that device shown in Fig. 3 when for acquire light source intensity when, component therein such as lens 306
It is available, and nonessential installing with filter fixation member 307.
Be fixed in the radiation direction of light source it is understood that collecting circuit board 308 can also be installed, optical detection device into
And the light of the transmission of beam splitter 305 can be acquired.
Step 202: temperature correction is carried out to the light intensity value.
Specifically, the mode that step 2021 can be used to 2023 descriptions in this step is realized.It 4 is retouched with reference to the accompanying drawing
It states.
Step 2021: obtaining detection result of the optical detection device under transformation temperature.
As shown in figure 4, the figure is a kind of three-dimensional view for correction relationship acquisition device that embodiment provides.The device includes
Transmitting terminal and receiving end, wherein transmitting terminal is made of one group of device shown in Fig. 3 of the first temperature control box 41 and its inside；Receiving end
It is made of another group of device shown in Fig. 3 of the second temperature control box 42 and its inside.First temperature control box 41 and the second temperature control box 42 divide
Other PID (proportional-integral-differential, Proportional-integral-derivative) controller collocation uses, for controlling
Its respective internal temperature.
First temperature control box 41 is provided with light source and its drive circuit board, and the corresponding position of the second temperature control box 42 is placed in Fig. 3
Collecting circuit board 308, the optical detection device on collecting circuit board 308 are the optical detection device for needing to carry out temperature correction.Fig. 4
Shown in device be mainly used for obtaining the correction relationship formula of the optical detection device, come in aligning step 201 with this correction relationship formula
The light intensity value of optical detection device detection.
Using device shown in Fig. 4, the temperature for controlling the first temperature control box of transmitting terminal 41 is constant, and then the environment temperature of light source
It is constant；The temperature for controlling and receiving the second temperature control box 42 of end changes, and then the environment temperature of optical detection device changes.It can
With understanding, in the second temperature control box 42 each time in temperature ramp de, detection result (the i.e. light of temperature and optical detection device
Intensity values) there are one-to-one relationships；In second temperature control box 42 each time temperature decline during, temperature also with optical detection device
Detection result there are one-to-one relationships.
It is transmitting terminal temperature curve when control transmitting terminal temperature is constant in 75 hour time and transmitting shown in Fig. 5
Hold light signal curve.According to Fig. 5 as can be seen that when transmitting terminal temperature is relatively stable, transmitting terminal light signal is also more steady
It is fixed.
It is the temperature variation curve and receiving end signal curve of receiving end in 75 hour time shown in Fig. 6.According to figure
The floating variation tendency of two curves may further determine that optical detection device is susceptible to the influence of environment temperature in 6.With this
As it can be seen that temperature correction is very necessary for the accuracy of detection result.
Step 2022: the correction relationship formula of the optical detection device is obtained according to the temperature and the detection result.
It, can be with according to detection result and each detection result corresponding temperature of the optical detection device under transformation temperature
Analysis obtains detection result change rate and the mutual corresponding data of temperature variation, according to the available detection result of these data
The variation relation figure of the change rate amount of varying with temperature, referring to Fig. 7.
Solid line in Fig. 7 is detection result change rate and the mutual corresponding data of temperature variation.One such as dotted line in Fig. 7
It is shown unitary fit correlation straight line, the mathematic(al) representation of the linear line is y=0.064841x-0.41985；Another such as
Fig. 7 chain lines show binary fit correlation curve, and the expression formula of the polynomial type relation curve is y=-0.00077975x
^2+0.081597x-0.25326.Specifically, it can select to determine a lines from fit correlation straight line and fit correlation curve,
Using its mathematic(al) representation as correction relationship formula.According to the difference of selection standard, have for a plurality of straight line and curve that fit
There are many ways to body is selected and is determined, herein without limiting.
Step 2023: temperature correction being carried out to the light intensity value using the correction relationship formula.
It should be noted that in the present embodiment, light intensity value can be by the electric signal phase that obtains after photoelectric conversion and processing
It should characterize.It is illustrated below by an example and how temperature correction is carried out to light intensity value.
It in this example, is y=kx+b using the correction relationship formula that Fig. 4 device obtains optical detection device.The correction relationship
In formula, x indicates that temperature variation, y indicate detection result (electric signal) variable quantity.
If the light intensity value Y1 of optical detection device actual detection in the case where temperature X1, temperature X1 is relative to temperature reference
The temperature variation of value X0 is Δ X, wherein Δ X=X1-X0；Detection of the light intensity value Y1 with respect to the light intensity a reference value Y0 at a temperature of X0
Results change amount is Δ Y, wherein Δ Y=Y1-Y0.In conjunction with above-mentioned correction relationship formula, it is known that Δ X and Δ Y meets above-mentioned correction and closes
It is formula, i.e. Δ Y=k* Δ X+b.
Pass through the light intensity value Y after correcting under the conditions of following formula (1) calculating temperature X1:
Y=Y1+ Δ Y formula (1)
It is understood that temperature variation and detection result variable quantity are all not linearly to close in correction relationship formula
System, it is also possible to the multiple relationship of item or the relationship of exponential form.Therefore, the correction relationship formula of optical detection device is different, right
Light intensity value after correcting at identical temperature may also be different.
It should be strongly noted that the light source light intensity values and acquisition that are detected in the present embodiment for obtaining optical detection device
The execution sequence of the correction relationship formula of optical detection device is without limiting.That is, correction relationship formula can be obtained first,
After obtain light intensity value, then light intensity value is corrected using correction relationship formula；Light intensity value can also be obtained first, obtained thereafter
Correction relationship formula is finally corrected light intensity value using correction relationship formula.
When obtaining light intensity value, control transmitting terminal temperature changes, and it is constant to control and receive end temperature；It is closed obtaining correction
When being formula, controls and receives end temperature and change, control transmitting terminal temperature is constant.
Step 203: the light intensity value being compared with light intensity preset value, if the light intensity value is pre- greater than the light intensity
If value, then raise the DC component of the driving signal of the light source；If the light intensity value is less than the light intensity preset value, under
Adjust the DC component of the driving signal.
In the present embodiment, light intensity value can be the light intensity value after step 202 correction in step 203.
In the present embodiment, as an example, light intensity preset value can be the pre- of the optical detection device in preset time
If the average value of the light intensity value after number correction.For example, the light intensity value after 1000 detected in 3 hours corrections is made even
, using average value as light intensity preset value.Certainly, light intensity preset value is also possible to the light intensity target of purposefully stable light intensity
Value.Light intensity value after correction is greater than light intensity preset value, indicates that light intensity is excessively high, needs to reduce light intensity value with stabilized light source light
By force, in turn, light intensity value can be reduced by raising the DC component of light source drive signal；Light intensity value after correction is less than light intensity
Preset value, mark light intensity is too low, needs to increase light intensity value to stablize light intensity, in turn, by lowering the straight of light source drive signal
Flow component can increase light intensity value.
Referring to Fig. 8, two curves in the figure are respectively the temperature curve and transmitting terminal of transmitting terminal in 180 hour time
Signal curve.According to Fig. 8 as it can be seen that variation occurs for transmitting terminal constant temperature, and from starting to stablize light intensity, the transmitting terminal detected
Signal gradually tends to be steady.It can be seen that the method by implementing stabilized light source provided in this embodiment, light source is in environment temperature
Also stable signal, the i.e. influence this method reduce temperature to light source stability can be exported in the case where changing.
More than, a kind of method of stabilized light source as provided in this embodiment.This method passes through to probe source light intensity
Optical detection device is corrected, and overcomes the problems, such as that the accuracy influenced by ambient temperature of the detection result of optical detection device is insufficient.Into
And according to the light intensity value stabilized light source after correction, light stability effect is effectively promoted.
Method based on the stabilized light source that previous embodiment provides, correspondingly, the application also provides a kind of stabilized light source
Device.The device is described in detail below with reference to embodiment and attached drawing.
3rd embodiment
Referring to Fig. 9, which is a kind of structural schematic diagram of the device of stabilized light source provided by the present application.
As shown in figure 9, the device of stabilized light source provided in this embodiment, comprising: light intensity acquisition module 901 and light stability
Module 902.
Wherein, light intensity acquisition module 901, for obtaining the light intensity value of light source；
Light stability module 902, for according to the light intensity value, the DC component using the driving signal of the light source to be steady
The fixed light source, wherein the light source is modulated by the AC compounent of the driving signal.
More than, a kind of device of stabilized light source as provided by the embodiments of the present application.Because being driven the exchange point of signal
Amount modulation, so the light intensity of light source and the amplitude of AC compounent are positively correlated.Simultaneously as the DC component and friendship of driving signal
Flow component is negatively correlated, therefore the device can be realized the control to light source intensity by adjusting the DC component of driving signal.
Moreover, when temperature changes, light source intensity changes, and spectrum also drifts about by ambient temperature effect, pass through adjusting
The DC component of driving signal also can effectively inhibit the spectral drift of light source, the i.e. spectrum of stabilized light source.
It can be seen that is influenced by factors such as environment temperatures when light source, when light intensity and/or unstable spectral characteristic, utilization
The stability of light source can be improved in the DC component of driving signal.Further, which correspondingly has by stabilized light source
Conducive to the accuracy for improving optical detection result.
Optionally, the light intensity acquisition module 901, specifically includes:
First acquisition unit obtains the light intensity value of the light source for detecting using optical detection device；
The light stability module 902, specifically includes:
First stablizes unit, for the light intensity value to be compared with light intensity preset value, if the light intensity value is greater than
The light intensity preset value, then raise the DC component of the driving signal of the light source；If the light intensity value is less than the light intensity
Preset value then lowers the DC component of the driving signal.
Optionally, the light stability module 902 further include:
Light intensity correction unit, for carrying out temperature correction to the light intensity value.
Optionally, the light intensity correction unit is specifically used for obtaining detection knot of the optical detection device under transformation temperature
Fruit；The correction relationship formula of the optical detection device is obtained according to the temperature and the detection result；Utilize the correction relationship
Formula carries out temperature correction to the light intensity value.
Optionally, the light intensity preset value is the light after the preset number correction of the optical detection device in preset time
The average value of intensity values.
Above-mentioned apparatus is corrected by the optical detection device to probe source light intensity, overcomes the detection knot of optical detection device
The problem of fruit accuracy deficiency influenced by ambient temperature.In turn, according to the light intensity value stabilized light source after correction, light stability effect
Effectively promoted.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment it
Between same and similar part may refer to each other, each embodiment focuses on the differences from other embodiments.
For equipment and system embodiment, since it is substantially similar to the method embodiment, so describe fairly simple,
The relevent part can refer to the partial explaination of embodiments of method.Equipment and system embodiment described above is only schematic
, wherein unit may or may not be physically separated as illustrated by the separation member, as unit prompt
Component may or may not be physical unit, it can and it is in one place, or may be distributed over multiple networks
On unit.Some or all of the modules therein can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
Those of ordinary skill in the art can understand and implement without creative efforts.
The above, only a kind of specific embodiment of the application, but the protection scope of the application is not limited thereto,
Within the technical scope of the present application, any changes or substitutions that can be easily thought of by anyone skilled in the art,
Should all it cover within the scope of protection of this application.Therefore, the protection scope of the application should be with scope of protection of the claims
Subject to.
Claims (12)
1. a kind of method of stabilized light source characterized by comprising
Obtain the light intensity value of light source；
According to the light intensity value, stablize the light source using the DC component of the driving signal of the light source, wherein the light source
It is modulated by the AC compounent of the driving signal.
2. the method according to claim 1, wherein the light intensity value for obtaining light source, specifically includes:
It detects to obtain the light intensity value of the light source using optical detection device；
It is described according to the light intensity value, stablize the light source using the DC component of the driving signal of the light source, specifically include:
The light intensity value is compared with light intensity preset value, if the light intensity value is greater than the light intensity preset value, is raised
The DC component of the driving signal of the light source；If the light intensity value is less than the light intensity preset value, the driving is lowered
The DC component of signal.
3. according to the method described in claim 2, it is characterized in that, the light intensity value and light intensity preset value are compared described
Than before, the method also includes:
Temperature correction is carried out to the light intensity value.
4. according to the method described in claim 3, it is characterized in that, described carry out temperature correction, specific packet to the light intensity value
It includes:
Obtain detection result of the optical detection device under transformation temperature；
The correction relationship formula of the optical detection device is obtained according to the temperature and the detection result；
Temperature correction is carried out to the light intensity value using the correction relationship formula.
5. according to the method described in claim 2, it is characterized in that, the light intensity preset value is the optical detection in preset time
The average value of light intensity value after the preset number correction of element.
6. method according to claim 1-5, which is characterized in that the rated power of the light source is not less than described
Two times of the actual demand power of light source.
7. method according to claim 1-5, which is characterized in that the light source is the light by aging process
Source.
8. a kind of device of stabilized light source characterized by comprising
Light intensity acquisition module, for obtaining the light intensity value of light source；
Light stability module is used for described in the DC component stabilization according to the light intensity value, using the driving signal of the light source
Light source, wherein the light source is modulated by the AC compounent of the driving signal.
9. device according to claim 8, which is characterized in that the light intensity acquisition module specifically includes:
First acquisition unit obtains the light intensity value of the light source for detecting using optical detection device；
The light stability module, specifically includes:
First stablizes unit, for the light intensity value to be compared with light intensity preset value, if the light intensity value is greater than described
Light intensity preset value then raises the DC component of the driving signal of the light source；If the light intensity value is default less than the light intensity
Value, then lower the DC component of the driving signal.
10. device according to claim 9, which is characterized in that the light stability module further include:
Light intensity correction unit, for carrying out temperature correction to the light intensity value.
11. device according to claim 10, which is characterized in that the light intensity correction unit is specifically used for obtaining the light
Detection result of the detecting element under transformation temperature；The optical detection device is obtained according to the temperature and the detection result
Correction relationship formula；Temperature correction is carried out to the light intensity value using the correction relationship formula.
12. device according to claim 9, which is characterized in that the light intensity preset value is that the light is visited in preset time
The average value of light intensity value after surveying the preset number correction of element.
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