CN101501465A - Method and apparatus for determining intensities and peak wavelengths of light - Google Patents
Method and apparatus for determining intensities and peak wavelengths of light Download PDFInfo
- Publication number
- CN101501465A CN101501465A CNA2006800553910A CN200680055391A CN101501465A CN 101501465 A CN101501465 A CN 101501465A CN A2006800553910 A CNA2006800553910 A CN A2006800553910A CN 200680055391 A CN200680055391 A CN 200680055391A CN 101501465 A CN101501465 A CN 101501465A
- Authority
- CN
- China
- Prior art keywords
- detecting unit
- light
- wavelength range
- intensity
- predetermined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
The present invention provides a method and apparatus for determining intensities and peak wavelengths of light. The apparatus comprises one or more pairs of sensing units for sensing the light, a first sensing unit of a pair configured to sense a first intensity of the light in a first predetermined wavelength range with a first predetermined spectral responsivity and a second sensing unit of a pair configured to sense a second intensity of the light in the first predetermined wavelength range with a second predetermined spectral responsivity. The apparatus further comprises a processing system operatively connected to the one or more pairs of sensing units; the processing system configured to determine the intensity and peak wavelength for each of the one or more predetermined wavelength ranges of the light according to one or more predetermined functional relationships between each of the first intensity and second intensity.
Description
Technical field
The present invention relates to the optical detection system, and relate more specifically to be used for determining the method and apparatus of light intensity and peak wavelength.
Background technology
But for example according to such as the variation on all multifactor occurrence features of working temperature and light source ages, this is known in the art from the light of artificial light sources emission.Although technology is constantly improved and light emitting diode (LED) is used to various types of space illumination applications that number increases, current high-capacity LED has the tendency that working temperature is induced color displacement especially.In the different materials system of the high-capacity LED of the light that is used for implementing launching various different colours at present, the material system that is used to implement red LED is the most responsive to temperature variation usually.Therefore many multi-colored led basic luminaires need the control system of bulk of optical feedback form, thereby can keep the light emission of reasonably stability.Particularly, it is useful measuring light intensity and peak wavelength.
For example being used for surveying the method and apparatus by the light of the LED emission of the specific LED of the luminaire under the condition of work or particular type, is extensively known and easy acquisition in the art.In addition, the principle of work of these devices has description in many publications.Yet many these solutions suffer various types of decaying, and modal is the cost poor efficiency.
For example, U.S. Patent No. 4,904,088 has described a kind of be used for the determining radiation wavelength of monochromatic source and the method and apparatus of wavelength calibration radiation power.It provides a kind of be used for the determining wavelength of monochromatic source and the photoelectric measurement method of wavelength calibration power.The radiant flux of light source to be measured acts on the photodetector of different spectrum overall response degree by transfer device.Signal produces and is transferred to computing unit by the unit that is used to gather and handle measured value subsequently.In this computing unit, derives the wavelength specified quantitative according to above-mentioned signal, this wavelength specified quantitative after primary calibration with memory cell the comparison of wavelength particular data.Therefore, the actual wavelength of light source to be measured can be determined, and by the indicating member indication, perhaps supplies with by data-interface.When actual wavelength is known, can in storage unit, inquires the wavelength specific correction factor, and can in computing unit, calculate wavelength calibration power.Be used for determining that this equipment disposition of radiation wavelength and wavelength calibration radiation power becomes to be used for monochromatic source, and for general illumination is used may be complexity and with high costs potentially.
U.S. Patent No. 4,309,604 have described a kind of solid-state wavelength detection system, and it can be in response to the output signal that derives from opto-semiconductor device.This opto-semiconductor device comprises at least two PN junctions that are formed at apart from semiconductor substrate surface different depth place.Darker PN junction produces the output signal that is associated with the longer wavelength component of light incident thereon.More shallow PN junction produces the output signal that is associated with the shorter wavelength component of incident light.These two output signals with log-compressed also mutually relatively.Represent the wavelength information of incident light with the difference of the output signal of log-compressed.Yet this opto-semiconductor device is because this a plurality of PN junctions and complicated and make expensively so are with high costs for general application.
U.S. Patent Application Publication No.2004/0022282 has described and a kind ofly has been used to monitor by the structure such as the primary radiation bundle of the such light emitted of the laser diode with nominal emission wavelength.This structure comprises first and second photodetectors and wavelength selection element.Splitter module is provided to be used for the primary radiation beam splitting secondary beam from lasing light emitter, and selects element to guide this secondary beam towards this first photodetector via the wavelength of association.This wavelength selects element to have wavelength selective transmission-reflection characteristic, and described thus secondary beam is partly propagated and partly selected element reflects to second photodetector from described wavelength towards described first photodetector.Output signal from these photodetectors has such intensity, and the performance of these intensity is functions of wavelength and complimentary to one another.The signal processing circuit that comprises adder Module and subtracter block further is provided, from the output signal of photodetector be supplied to this signal processing circuit with produce with Wavelength-independent with signal and with wavelength relevant difference signal, wherein should with the intensity of the optical radiation that produces by light source with signal indication of Wavelength-independent, the actual wavelength of the radiation that difference signal indication that should be relevant with wavelength is produced by described light source and its nominal emission wavelength poor.Yet, this complex structure and with high costs, and be not easy to be integrated in the light-emitting device.
Therefore, need a kind of novelty and cost effective method and equipment that is used for determining light intensity and peak wavelength.
It is to think and the relevant information of the present invention's possibility in order to disclose the applicant that this background information is provided.Need not to admit or should not be construed as any aforementioned information constitutes and the inconsistent prior art of the present invention.
Summary of the invention
The purpose of this invention is to provide a kind of method and apparatus that is used for determining light intensity and peak wavelength.According to an aspect of the present invention, a kind of be used for the determining intensity of light in one or more predetermined wavelength ranges and the equipment of peak wavelength are provided, this equipment comprises: the one or more pairs of detecting units that are used to detect this light, first detecting unit of a pair of detecting unit is configured to detect with the first predetermined spectral response degree first intensity of the light in first predetermined wavelength range, and second detecting unit of a pair of detecting unit is configured to detect with the second predetermined spectral response degree second intensity of the light in first predetermined wavelength range; And but the place of working is connected to the disposal system of these one or more pairs of detecting units, this disposal system is configured to according to the relation of the one or more predefined functions between each intensity in this first intensity and second intensity, determines the intensity and the peak wavelength of each predetermined wavelength range in these one or more predetermined wavelength ranges of this light.
According to another aspect of the present invention, provide a kind of being used for to determine the intensity of light in predetermined wavelength range and the method for peak wavelength, the method comprising the steps of: first intensity that detects this light in this predetermined wavelength range with the first predetermined spectral response degree; Detect second intensity of this light in this predetermined wavelength range with the second predetermined spectral response degree; And use predefined function between this first intensity and second intensity to concern to determine intensity and peak wavelength in this predetermined wavelength range.
According to another aspect of the present invention, a kind of be used for the determining intensity of light in predetermined wavelength range and the equipment of peak wavelength are provided, this equipment comprises: be used to detect first detecting unit of this light, this first detecting unit is configured to detect with the first predetermined spectral response degree first intensity of this light in this predetermined wavelength range; But the place of working is connected to the disposal system of this first detecting unit, this disposal system is configured to resolve this first predetermined spectral response degree of this first detecting unit of sharpening, produce second intensity of this light thus, this disposal system also is configured to concern to determine according to the one or more predefined functions between this first intensity and second intensity intensity and the peak wavelength of this predetermined wavelength range of this light.
Description of drawings
Fig. 1 explanation under two kinds of different operating conditions from the exemplary spectroscopy of the mixed light of three LED.
Fig. 2 explanation is used for the exemplary spectrum transmissivity of the optical filter that the detecting unit with one embodiment of the present of invention uses.
Fig. 3 illustrates that the responsiveness characteristic and the exemplary spectrum radiation power of a pair of detecting unit of one embodiment of the present of invention distribute.
Fig. 4 illustrates that the responsiveness characteristic and the exemplary spectrum radiation power of a pair of detecting unit of another embodiment of the present invention distribute.
Fig. 5 illustrates that the responsiveness characteristic and the exemplary spectrum radiation power of a pair of detecting unit of another embodiment of the present invention distribute.
Fig. 6 explanation is used for the exemplary spectrum transmissivity of the optical filter that the detecting unit with another embodiment of the present invention uses.
Fig. 7 illustrates the diagram relation of the relation of the sensor unit signal of one embodiment of the present of invention and peak wavelength.
Fig. 8 illustrates the diagram relation of the relation of the sensor unit signal of another embodiment of the present invention and peak wavelength.
Radiative detecting light spectrum responsiveness and the parsing sharpening spectral responsivity of Fig. 9 explanation in red, green and blue look wavelength region may.
Figure 10 illustrates the diagrammatic view of the equipment of one embodiment of the present of invention.
Figure 11 illustrates the diagram of transmissivity of a pair of detecting unit of one embodiment of the present of invention.
Figure 12 illustrates the diagrammatic view of the equipment of another embodiment of the present invention.
Figure 13 illustrates the diagrammatic view of the enforcement of one embodiment of the invention in the luminaire.
Embodiment
Definition
Term " light-emitting component " (LEE) for example is used to define when applying electric potential difference at the device two ends or making electric current come activating appts by device any device of emitted radiation in any zone of electromagnetic wave spectrum or zone combination (for example, visible region, infrared and/or ultraviolet region).Therefore, light-emitting component can have monochrome, accurate monochrome, polychrome or broadband spectrum emission characteristics.The example of light-emitting component comprises other similar devices that light emitting diode, optical pumping nanocrystal light emitting diode or those skilled in the art of semiconductor, organism or polymer/polymeric light emitting diode, optical pumping phosphor-coating expect easily.And the term light-emitting component is used to define the dedicated devices of emitted radiation, LED tube core for example, and the dedicated devices that can be used in the definition emitted radiation equally with wherein be placed with the shell of this dedicated devices or a plurality of devices or the combination of packing.
Term " intensity " is used for according to International Commission on Illumination
TM(CIE) standard definition is left light source and the radiation of propagating or the luminous flux merchant divided by this cube corner elements in comprising the cube corner elements of assigned direction.
Term " colourity " is used for according to International Commission on Illumination
TMThe perceived color impression of standard definition light (CIE).
Term " colour gamut " is used to define a plurality of chromatic values that luminaire can reach.
Term " spectral radiant flux " is used to be defined in the radiation power of wavelength X per unit wavelength.
Term " spectral power distribution " is used for according to International Commission on Illumination
TM(CIE) spectral radiant flux of standard definition on predetermined wavelength range distributes.
Term " peak wavelength " is used for according to International Commission on Illumination
TM(CIE) standard definition is at the wavelength at the maximal value place of given spectral power distribution.
Term " spectral responsivity " is used to be defined in the responsiveness of the sensor of wavelength X per unit wavelength.
Term " spectral resolution " is used for defining the minimum interval between two different wave lengths of the differentiable spectrum of sensor.This can come quantitatively with interval delta λ, and wherein λ is for measuring wavelength.
When this uses, term " approximately " refer to depart from nominal value+/-10% variation.Should be understood that no matter whether point out specially, always this variation is included in any set-point that provides herein.
Except as otherwise noted, all technology of herein using and scientific terminology have with the present invention under technical field in the identical meaning of implication of those of ordinary skill common sense.
The invention provides a kind of method and apparatus that is used for determining light intensity and peak wavelength.The present invention can use in many different application.For example, the present invention can be embedded in and be used for monitoring and the photoemissive feedback control system of stable polychrome LEE base luminaire, perhaps can be used in the independent spectroscopy applications that is used for studying by the light of another type light emitted.
Be used for determining that the equipment of light intensity and peak wavelength comprises disposal system and one or more pairs of detecting unit.Each detecting unit of a pair of detecting unit provides the different responsivenesses in the predetermined wavelength range (for example red wavelength part, green wavelength part, blue wavelength part etc.).Each detecting unit of a pair of detecting unit detects the light in this predetermined wavelength range, and each detecting unit of a pair of detecting unit is based on the responsiveness of this particular detection unit and produce signal, the intensity of the light that this signal indication detected in this predetermined wavelength range.
This disposal system is connected to these one or more pairs of detecting units and can controls and obtain data from these one or more pairs of detecting units.This disposal system is utilized the specific function relation between the spectral responsivity of each detecting unit of a pair of detecting unit, determine radiative peak wavelength and total intensity in the predetermined wavelength range, wherein this specific function relation is associated the collection intensity of each detecting unit of a pair of detecting unit.In one embodiment of the invention, select the spectral responsivity of each detecting unit of a pair of detecting unit, the relation between their the corresponding output of making provides and has been used for the resolution of aspiration level of peak wavelength that identification produces one or more light-emitting components of the light that is positioned at this predetermined wavelength range, can realize that thus bulk of optical feedback to control system or controller is to be used to keep or obtain the light of desired color.
In one embodiment, equipment of the present invention can provide a kind of device, is used to be evaluated at the shift in emission wavelength that produces one or more light-emitting components of light in this predetermined wavelength range.
Fig. 1 explanation is at condition of work T
1501 and T
2The exemplary spectroscopy of polychrome LEE base luminaire that has the LEE of three kinds of different colours for 502 times.As shown in Figure 1, can identification have the general characteristic of the light of narrow-band polychrome component.
Further with reference to figure 1, also can be from the change when the temperature change of the light of three look LEE base luminaire emission by identification.For purpose of explanation, the operational temperature conditions of this LEE base luminaire is reduced to for all three look LEE and equates.Working temperature T
1501 and T
2502 expression, wherein T
1501 are higher than T
2502.For a variety of causes that comes from the characteristic of making LEE institute materials used, generally rise and present red shift and spectrum widening along with working temperature by the spectral composition of the light of LEE emission.Because make the reason of the characteristic of these different colours LEE institute materials used type, for red LEE, to compare with blue LEE with green, peak wavelength is bigger usually towards the amount of more long wavelength or more low-yield skew.Note, can present different qualities based on other LEE of other materials system.
Detecting unit
For the considerable peak of number in can the spectrum of resolved detection light, equipment of the present invention need be used to differentiate one or more pairs of detecting units at each peak.In an embodiment of the present invention, for example, if this equipment is used for monitoring each LEE of the FEEDBACK CONTROL that is used for LEE base luminaire, the logarithm of the detecting unit of each equipment can be bigger.Each detecting unit of a pair of detecting unit is characterised in that the different spectral responsivities to the light in the predetermined wavelength range.In one embodiment, outside this predetermined wavelength range, the spectral responsivity of each detecting unit of a pair of detecting unit is zero substantially.
Each detecting unit can dispose according to many different modes, as long as the particular detection unit is a spectral response in selected predetermined wavelength range.In one embodiment of the invention, detecting unit can be configured to the combination of broadband optical sensor and wave filter, and the configuration of its median filter can define this predetermined wavelength range.In this manner, wave filter can stop the light of wavelength outside this predetermined wavelength range basically.
In another embodiment, detecting unit can be configured to have the narrowband optical sensor of spectral responsivity in this predetermined wavelength range.In another embodiment, detecting unit can be configured to have the narrowband optical sensor of variable spectral responsivity, and wherein detecting unit can be conditioned with collection and be illustrated in radiative information in the different predetermined wavelength ranges.
In an embodiment of the present invention, a pair of detecting unit is arranged such that in this predetermined wavelength range that detecting unit is mainly responded, its spectral responsivity be complementary, wavelength shift or the like.
In an embodiment of the present invention, the relative spectral response degree of each detecting unit of a pair of detecting unit is similar haply, but spectral responsivity wavelength shift relative to one another.Relative wavelength skew between the spectral responsivity of a pair of detecting unit can be configured to the part of this predetermined wavelength range or equal this predetermined wavelength range.For example, in an embodiment of the present invention, first detecting unit of a pair of detecting unit has first spectral responsivity, and the spectral responsivity of second detecting unit is with respect to the spectral responsivity of first detecting unit wavelength shift scheduled volume up or down.For example, this scheduled volume can be between 1nm and 40nm, 5nm and 30nm, between 10nm and the 20nm or the like.The selection of the relative wavelength skew of the spectral responsivity of the detecting unit of a pair of detecting unit can be chosen, makes the assessment of the radiative peak wavelength that this predetermined wavelength range is interior to determine in the expected accuracy level.
In an embodiment of the present invention, and in conjunction with Fig. 2, this Fig. 2 illustrates the exemplary spectroscopy transmissivity of six optical filters, and these six optical filters can be used in combination with broadband sensor and implement six detecting units, and these six detecting units can form three pairs of detecting units.Each of these three pairs of detecting units is to being configured to the predetermined wavelength range in response to separately, and in this example, these predetermined wavelength ranges are red wavelength zone, blue wavelength region and green wavelength region.In this embodiment of the present invention, the spectral responsivity of each detecting unit of a pair of detecting unit is basic identical, and the 20nm wavelength shift of relative spectral response degree wherein is provided between first detecting unit of a pair of detecting unit and this second detecting unit to detecting unit.In this embodiment, and specifically be the situation in red wavelength zone in conjunction with this predetermined wavelength range, this comprises first detecting unit and second detecting unit to detecting unit, this first detecting unit is formed by broadband optical sensor and the optical filter that has as 210 transmissivities that define, and this second detecting unit is formed by broadband optical sensor and the optical filter that has as 212 transmissivities that define.
In another embodiment of the present invention, a pair of detecting unit can be configured to have spectral responsivity as shown in Figure 3.In this configuration, first detecting unit has spectral responsivity 214, and this spectral responsivity 214 is at first's substantially constant and to drop at the wavelength region may ramp type of definition be zero substantially.Second detecting unit has spectral responsivity 216, and this spectral responsivity 216 is zero substantially and rises to substantially invariable level at the wavelength region may ramp type of this definition in first.The wavelength region may of this definition can be part or all of this predetermined wavelength range.In one embodiment, the wavelength region may of this definition is the expection spectral radiant power distribution 218 of photometry to be checked.In this configuration of a pair of detecting unit, the spectral responsivity of each detecting unit is complementary substantially.
In another embodiment of the present invention, a pair of detecting unit can be configured to have spectral responsivity as shown in Figure 4.In this configuration, first detecting unit has spectral responsivity 220, and this spectral responsivity 220 is at first's substantially constant and to drop at the wavelength region may ramp type of definition be zero substantially.Second detecting unit has the spectral responsivity 222 similar substantially to the spectral responsivity of first detecting unit, but the decline of the ramp type of spectral responsivity occurs in longer wavelength.The wavelength region may of this definition can be part or all of this predetermined wavelength range.In one embodiment, the wavelength region may of this definition is the expection spectral radiant power distribution 224 of photometry to be checked.In this configuration of a pair of detecting unit, the wavelength shift substantially relative to one another of the spectral responsivity of each detecting unit.
In another embodiment of the present invention, a pair of detecting unit can be configured to have spectral responsivity as shown in Figure 5.In this configuration, first detecting unit and second detecting unit have the abundant narrow spectral responsivity 226 and 228 of wavelength shift relative to one another respectively.In one embodiment, this wavelength shift can be selected as crossing over part or all of this predetermined wavelength range.In one embodiment, this wavelength shift can be selected as crossing over the expection spectral radiant power distribution 230 of photometry to be checked.
In another embodiment of the present invention, a pair of detecting unit can be configured to have spectral responsivity as shown in Figure 6.In this configuration, first detecting unit is formed by the broadband optical sensor and first wave filter, and this first wave filter is made by certain material and had first thickness.Second detecting unit is formed by the broadband optical sensor and second wave filter, and this second wave filter is made by identical certain material but had second thickness, and wherein this second thickness is greater than this first thickness.In this configuration of a pair of detecting unit, to compare with first detecting unit, second detecting unit has narrower spectral responsivity, and therefore this relative configuration of a pair of detecting unit can be reached reducing of crosstalking each other.For example, Fig. 6 explanation has the red filter 252 of first thickness and the spectral responsivity with red filter 257 of second thickness, and this second thickness is about four times of first thickness.Fig. 6 also illustrates, the spectral responsivity of green filter 251 and about four times of thick green filters 256, blue electric-wave filter 250 and about four times of thick blue electric-wave filters 255.
Those skilled in the art know, and the spectral-transmission favtor of bulk optics wave filter can be defined by Bill (Beer) law, and is as follows:
I(x)＝I(0)*exp(ln(a(λ))*x) (1)
Wherein I (x) is that I (0) is the incident light intensity apart from the light intensity at x place, wave filter surface, and the wavelength dependent attenuation constant of a (λ) for being determined by experiment usually.
In another embodiment of the present invention, the multi-coated interference wave filter can be advantageously used in a pair of detecting unit of enforcement with the wavelength shift of incident angle of light.For example, first detecting unit can comprise optical sensor and wave filter, and second detecting unit can form by identical optical sensor and wave filter, and wherein the wave filter of second detecting unit tilts with respect to the wave filter of first detecting unit.In this manner, the spectral responsivity of second detecting unit is with respect to the spectral responsivity wavelength shift of first detecting unit.
In an embodiment of the present invention, more than a pair of detecting unit is used to assess the emission of predetermined wavelength range inner light source.For example, three detecting units, four detecting units or more a plurality of detecting unit can be used for assessing the emission of predetermined wavelength range inner light source.Can be for the spectral responsivity selection each other of these detecting units of this predetermined wavelength range based on determining to the peak wavelength of the light of predetermined wavelength range inner light source emission and the expectation resolution that intensity is assessed.The emission of using three or more detecting units to assess the light source in the predetermined wavelength range can improve its assessment precision.
At the embodiment that is used for assessing the emission of the light source in the predetermined wavelength range more than a pair of detecting unit, one or more additional detected unit can be used as the affirmation detecting unit, thereby checking has the expected accuracy level by the information of one or two detecting unit collection of a pair of detecting unit.
Be used in the embodiment of the invention that FEEDBACK CONTROL LEE base luminaire is implemented, changing in the desired wavelength coverage at the peak wavelength of one or more light-emitting components, the spectral responsivity of a pair of detecting unit presents greatly and changes.
For example, when be exposed to the light time under condition of work, each detecting unit provides a signal, the convolution of the spectral power distribution of this this light of signal indication and the spectral responsivity of this detecting unit.Measuring-signal from detecting unit can be proportional to:
s(τ)＝∫σ(λ-τ)Φ(λ)dλ (2)
Wherein σ is the detecting unit responsiveness of every wavelength X, and Φ is the detection light spectral power (that is, spectral power distribution) of every wavelength, and τ is for being included in the wavelength shift in the σ.
In an embodiment of the present invention, for the control purpose, detecting unit is characterised in that the strong linear change to s (τ), thereby surveys the variation of the spectral power distribution Φ that detects light reliably.For example, temperature change can make Φ skew and broadening among the LEE.The spectral power distribution Φ of LEE light can be with having particular peak wavelength λ
0And the Gaussian distribution of half-peak breadth (FWHM) wavelength coverage is similar to.Be offset from is to be reflected in λ
0In the variation of FWHM.In one embodiment, wherein detecting unit uses broadband optical sensor and the combination with optical filter of suitable filter characteristic to implement, make variation maximization from the response of detecting unit, this can have the wave filter of predetermined filters characteristic and realize by changing τ skew those filter characteristics shown in following formula by use, wherein from the function of the variation that is changed to the spectral power distribution Φ that detects light of the response of detecting unit.
In another embodiment of the present invention, wherein detecting unit uses the narrowband optical sensor to implement.In this configuration, the spectral responsivity that does not need extra optical filter to obtain to expect, and this optical sensor can be configured to mainly by suitable spectral responsivity is provided self, thereby can indicate the variation of the spectral power distribution that detects light reliably.
Fig. 7 and Fig. 8 explanation are from the signal intensity of the detection light of two different detection units acquisitions of one embodiment of the invention and the graphical representation of exemplary of peak wavelength relation.This series data is to use the light of the red LED of comfortable different working temperature conditions to obtain.Although signal intensity changes mainly due to the skew of peak wavelength, detect the FWHM or the peak amplitude variation of the spectral power distribution of light and also can induce variation.In this embodiment, each detecting unit of a pair of detecting unit comprises the corresponding red filter in broadband sensor and two red filter, and the filter characteristic of this red filter as shown in Figure 2.As can be seen from Figure 2, these two main differences of detecting unit are the filter characteristic that is offset, and wherein the global shape of filter characteristic is similar substantially.
Fig. 7 explanation has the change in signal strength of the detecting unit of optical filter characteristic 210, the optical filter characteristic 212 of then using shown in Figure 8.At Fig. 7, the approximate relevance of funtcional relationship between signal intensity and the peak wavelength and linear least square is fabulous, and this makes and almost be difficult to distinguish these two under the two yardstick that all is illustrated.The relevance of configuration shown in Figure 8 is slightly poor.Can be readily seen that from the linear-apporximation of the signal of detecting unit signal output, use first optical filter shown in Figure 8 that in fact the variation of every nm signal about 10% is provided in the influence of peak wavelength shift, by contrast, use first optical filter shown in Figure 7, the variation of every nm signal about 5% is provided.
In an embodiment of the present invention, the LEE of particular type presents because the peak amplitude that the working temperature fluctuation causes changes, and it is insignificant for above-mentioned purpose that this peak amplitude changes.Note, can not ignore because the peak amplitude that the desired intensity adjustment causes changes that yes.
In an embodiment of the present invention, optical sensor can be the light-current converter that comprises photodiode and current amplifier, and these elements of this optical sensor for example can be configured on the one chip.Yet, optical sensor can comprise other similar light detection devices that those skilled in the art know, and includes but not limited to phototransistor, photo-resistor, photovoltaic cell, photoelectric tube, photomultiplier or other forms of light-electric pressure converter or light-frequency converter.Optical sensor can comprise lens element, thereby strengthens the light quantity that this optical sensor responds.
In embodiments of the present invention, wave filter is film interference wave filter or transmission dyes color filter.In addition, also can use employing to have the wave filter or the bootmode resonance filter of the unusual photonic crystal of resonance.In another embodiment, wave filter can be configured to adjustable liquid crystal Leo (Lyot) bandpass filter, have the other types optical filter that individual layer liquid crystal material, plasmon wave filter, bragg filter or those skilled in the art of the logical spectral-transmission favtor of band of non-constant width expect easily.
Disposal system
Disposal system can be implemented to handle the signal from detecting unit according to any suitable analog or digital mode.For example, disposal system can be configured to the other forms of calculation element that computing machine, computing system, microcontroller or those skilled in the art understand easily, and it can carry out the data manipulation and the analysis of desired level to the acquisition of information relevant with the light emission of light source.This disposal system comprises herein the one or more storage mediums that are referred to as " storer ".This storer can be volatibility and the non-volatile computer memory such as RAM, PROM, EPROM, EEPROM, floppy disk, compact disk, CD, tape etc., has wherein stored to be used to define the control program (for example software, microcode, firmware etc.) of the action of being carried out by disposal system for visiting subsequently and carrying out.
By suitably making up and handle the output signal from a pair of detecting unit, disposal system can be determined detection light intensity and peak wavelength or the wavelength shift in the predetermined wavelength zone.Describe in detail very much at particular type embodiment of the present invention as following, this disposal system can be utilized the division of signal intensity.
For example, if in fact the responsiveness of detecting unit does not rely on peak amplitude and the total intensity that detects light, and in fact the FWHM that detects light keep constant, and then the ratio of two signals provides the direct indication that detects the light wavelength skew.For example, in an embodiment of the present invention, expand into a series of function of first orders in the wavelength shift as mentioned above, then can determine one or more funtcional relationships by ratio with convolution integral.Can determine the variation of peak amplitude or peak amplitude subsequently based on the data that obtain from the wavelength shift analysis.
In an embodiment of the present invention, a pair of detecting unit is arranged such that its corresponding spectral responsivity is by wavelength shift, as shown in Figure 2 in predetermined wavelength range.When intensity or peak wavelength change, the output of two detecting units all will change.For example, if this is to the output substantially flat of first detecting unit of detecting unit, and this is to the output remarkable " sharp keen " of second detecting unit of detecting unit, the peak for example appears, then the difference between the output of first detecting unit and second detecting unit can be determined also can determine radiative intensity and peak wavelength from this to the one or more funtcional relationships between the output signal of each detecting unit of detecting unit thus owing to wavelength variations.
In an embodiment of the present invention, a pair of detecting unit is arranged such that its corresponding spectral responsivity is for as shown in Figure 3.In this configuration, if detect the light intensity increase in the predetermined wavelength range and do not have peak wavelength to change or spectrum widening, then this will keep constant substantially to the ratio between the output signal of detecting unit, can directly measure light intensity thus.Yet if radiative peak wavelength shift or spectrum widening occurs, the ratio of output signal will change usually.Based on one or more predetermined association or funtcional relationship between this output signal, can assess light intensity and peak wavelength in this predetermined wavelength range to each detecting unit of detecting unit.
In an embodiment of the present invention, a pair of detecting unit is arranged such that its corresponding spectral responsivity is for as shown in Figure 4.In this configuration, shown in 222, the output that has the detecting unit of general planar part on radiative spectral power distribution substantially can provide at radiative ionization meter.In addition, shown in 220, when the output that has the detecting unit of the output of detecting unit of ramp type spectral responsivity and this general planar on radiative spectral power distribution converts, can be provided for assessing the means of peak wavelength shift and spectrum widening.Therefore this make can produce one or more funtcional relationships, and this funtcional relationship defines the output signal of one or more pairs of detecting units and the relevance between radiative intensity and the peak wavelength.
In an embodiment of the present invention, a pair of detecting unit is arranged such that its corresponding spectral responsivity is for as shown in Figure 5.In this embodiment of the invention, the one or more funtcional relationships between the output signal of a pair of detecting unit and radiative intensity and the peak wavelength can be based in part on the supposition spectral power distribution of light source.For example, the spectral power distribution of LED can be similar to Gaussian distribution or the linear combination with two Gaussian functions of different centre wavelengths.
In an embodiment of the present invention, can use one or more analytical algorithms, one or more numerical algorithm, above-mentioned one or both of the output signal analysis of carrying out each detecting unit of a pair of detecting unit, this has defined the order of the calculating of being carried out by disposal system, thereby assesses radiative intensity and peak wavelength.These one or more algorithms can be stored in the storer and use subsequently for disposal system.
In an embodiment of the present invention, disposal system comprises neural network.In this embodiment, neural network can be used as the general approximator that can represent any continuously differentiable to divide limited function.In addition, for example as Haykin, S., Neural Networks:A Comprehensive Foundation, Second Edition, Prentice Hall, the neural network of describing in 1999 and U.S. Patent application No.10/897,990 can be represented the non-linear multi-variable function that uses minimum computational resource.This neural network can be the other forms of neural network that radial basis function (RBF), broad sense radial basis function (GRBF) or those skilled in the art understand easily.This neural network is represented multidimensional function and can be provided and radiative intensity and the relevant output signal of peak wavelength.Needn't need or even the analytical expression of expectation with valuation functions because neural network can based on example import data and known or expectation output data and by training to learn this function.Therefore can use predetermined input set,, train this network at " factory's platform " for example from the signal output of a pair of detecting unit and represent the intensity to be determined and the Expected Response of peak wavelength.
In embodiments of the present invention, this neural network is radial basis function (RBF) network, and it is the feedforward framework with input layer, hidden layer and output layer.Input layer has n neuron, corresponding to n the element of input vector x.Hidden layer has h neuron and a biasing neuron, and each input neuron is connected to this h hidden layer neuron fully.Each hidden layer neuron (comprising the biasing neuron) is connected to m output neuron.On behalf of the m kind of input vector, each output layer neuron may one of export.At work, input vector x offers the RBF network arbitrarily.Its output of each hidden layer neuron computes, and the result is provided to output layer.Each output layer neuron is carried out the weighted sum of this hidden layer neuron output.Input vector x is mapped to output vector z thus.Implicit neuron number can change according to the complicacy for the treatment of approximate multidimensional function.For above-mentioned explanation, neuron is the simplification computation model of biological neuron, and it can be considered to usually gain is one or littler non-linear amplifier.
Know as is known to the person skilled in the art, the training of radial basis function neural network comprises center and the width of determining the hidden layer neuron excitation function, and the required weight of definite output layer neuron.There are many kind training strategies, from from Lowe, D., Adaptive Radial BasisFunction Nonlinearities and the Problem of Generalization, First IEEEInternational Conference on Artificial Networks, implicit neuronal center is selected in the training set of the input vector of 1989 definition at random, to using by Leonardis, A., and Bishchof, A., An Efficient MDL-Based Construction of RBF Networks, Neural Networks, the regularization theory of 1998 definition.
In an embodiment of the present invention, the resolved sharpening of the spectral responsivity of detecting unit.In this embodiment, suppose to have the measuring assembly of the m of different spectral responsivities to detecting unit, that is, and measure spectrum responsiveness S
M, each spectral responsivity can be considered as having the linear combination of the m of different spectral responsivities to the virtual or sharpening set of detecting unit, that is, and and virtual spectral responsivity S
VCan select these virtual spectral responsivities, make the bandwidth of each spectral responsivity generally be narrower than its corresponding true or spectral responsivity of measuring.Fig. 9 takes from Drew, M.S., with G.D.Finlayson.2000. ＂ Spectral Sharpening with Positivity, ＂ Journal of theOptical Society of America A, 17 (8): 1361-1370, this figure illustrates the example of spectrum sharpening, m=3 wherein, and measure spectrum responsiveness S is shown
M305,306 and 307 and the corresponding virtual spectral responsivity S of resolved sharpening
V310,311 and 312.
For example, as Drew, M.S., with G.D.Finlayson.1994. ＂ Device-Independent Color via Spectral Sharpening, ＂ Proc.SecondColor Imaging Conference:Color, Science, Systems and Applications, IS﹠amp; T/SID, pp.121-126 is defined, and the sharpening spectral responsivity produces by m * m transformation matrix, and the spectral responsivity of wherein virtual or sharpening can be as giving a definition:
x
#(λ)＝T
Xx(λ) (3)
Wherein, for example:
And wherein x (λ) and x
#(λ) be respectively measurement and the spectral responsivity virtual or sharpening of wavelength X.
Know sharpening conversion T as is known to the person skilled in the art
XValue will depend on the selection of virtual spectral responsivity.In an embodiment of the present invention, the value of sharpening conversion can be determined, and makes that the spectral responsivity measurement of detecting unit and virtual or sharpening produces different outputs when being shone such as the such narrow-band light source of colored LEE.For example, the difference between the measure spectrum responsiveness of detecting unit and virtual or the sharpening spectral responsivity can be maximized, and its meaning is, can determine the intensity of colored LEE and the variation of peak wavelength under the condition of minimum signal to noise ratio (S/N ratio) simultaneously.
In an embodiment of the present invention, a pair of detecting unit disposes in the following manner, first detecting unit in the wherein a pair of detecting unit is collected the relevant information of light with the interior light emitted of first predetermined wavelength range, and second detecting unit in a pair of detecting unit collect with second predetermined wavelength range in the relevant information of light, this second predetermined wavelength range and this first predetermined wavelength range overlapping of light emitted.The spectral responsivity of first detecting unit and second detecting unit is subsequently as defined above and as Drew, M.S., with G.D.Finlayson.2000. ＂ SpectralSharpening with Positivity, ＂ Journal of the Optical Society of AmericaA, 17 (8): the such resolved sharpening described in the 1361-1370, to realize the first virtual detection unit and the second virtual detection unit respectively.The relevance of the output by first detecting unit, the first virtual detection unit, second detecting unit and the second virtual detection unit can be determined light intensity and peak wavelength in this predetermined wavelength range.
Temperature compensation
In an embodiment of the present invention, the compensation of the detecting unit responsiveness characteristic variations that working temperature is induced needs.The possible solution of the working temperature of stable detection unit comprises following combination: detecting unit is insulated, keeps the limited amount of radiant exposure and keep active or passive cooled or heating from the direct heat contact.It is known in the art that these measures corresponding is implemented in.
In another embodiment of the present invention, disposal system can be configured to consider the thermoinducible variation in the detecting unit spectral responsivity.In this embodiment, the temperature sensor that is adjacent to detecting unit can be provided, thus make it possible to collect the data relevant with the working temperature of detecting unit and assess thus and the spectral responsivity of determining one or more detecting units whether owing to temperature changes.
Optional filter apparatus
In one embodiment of the invention, can cause detecting unit to provide to the remarkable responsiveness of light outside the interested predetermined wavelength range and may cause signal wrong in peak wavelength and the intensive analysis.For example when use had the detecting unit of the spectral responsivity shown in Fig. 3 and 4, this situation can take place.Embodiment with reference to the detecting unit shown in Fig. 3 and 4, in these cases, any light of meeting marked change may influence the signal that detecting unit provides unpredictablely in the spectral composition outside ramp type wavelength coverage or frequency response degree characteristic zone, and may cause disposal system that the error result relevant with intensity and peak wavelength shift is provided.
In one embodiment of the invention, detecting unit can with extra filter combination, this wave filter blocks has the light of interfering wavelength, that is, the light of the wavelength outside the predetermined wavelength range of this detecting unit.
In one embodiment, in the luminaire with photoluminescence type LEE (for example using the UV LED or the blue led of phosphor or other visible light transition materials), this is particularly relevant.These LEE can launch a considerable amount of remaining ultraviolet lights, and for example when expectation contrasted the FEEDBACK CONTROL of funerary objects visible light emitted, this remnants ultraviolet light need not to be detected by detecting unit.Similarly, infrared radiation can cause unsuitable sensor reading and needs filtered.
In another embodiment of the present invention, the detecting unit with the spectral responsivity that is positioned at predetermined wavelength range substantially can provide better wavelength or frequency resolution.
Notice that although the combination for example by narrow band filter and broadband sensor can obtain narrow spectral responsivity characteristic, in one embodiment of the invention, it is useful using the narrowband optical sensor to implement detecting unit.As is known, most of narrow band filters can present significant filter characteristic and change when angle change for example.For example, the several years variation that light tilts not only can cause the remarkable broadening of filter characteristic of multi-coated interference wave filter, even causes wavelength shift.
With reference now to concrete example, the present invention is described.To understand, following example is intended to describe embodiments of the invention and is not intended to limit by any way the present invention.
Example
Figure 10 illustrates the equipment of embodiments of the invention.The optical coupled that comprises equipment 10 arrives color filter 12a, the 12b of photodetector 14a, 14b, and these color filter and photodetector form two detecting units together.Each photodetector has search coverage 16a, the 16b of the sensor parameters that is used for definite expression incident light 11.The output of photodetector 14a, 14b is connected to disposal system 18, the data that these disposal system 18 assessments receive from each photodetector 14a, 14b.
First detecting unit and second detecting unit of a pair of detecting unit are installed on public substrate usually, and this first detecting unit is formed by wave filter 12a and photodetector 14a, and this second detecting unit is formed by wave filter 12b and photodetector 14b.Because the efficient of photodetector 14a, 14b depends on the working temperature of photodetector 14a, 14b, photodetector 14a, 14b all can be installed on the isothermal area of this public substrate.Correspondingly, although the absolute spectral response degree of photodetector 14a, 14b can be with variation of ambient temperature, its relative spectral response degree can remain unchanged effectively.
As previously mentioned, in current described embodiment of the present invention, color filter 12a, 12b optical coupled are to photodetector 14a, 14b.Preferably, this is fully far away at interval to the wave filter 12a of first detecting unit of detecting unit and photodetector 14a and this wave filter 12b and photodetector 14b to second detecting unit of detecting unit, to reduce crosstalking therebetween.In another embodiment, color filter 12a, 12b can concern at interval with photodetector 14a, 14b.Color filter 12a, 12b and photodetector 14a, 14b can dispose angledly and arrange along the axle vertical with the axle of incident light 11 or with the axle of incident light 11.
In current described embodiment, as shown in figure 11, forming this is responsive to the wave filter 12a of first detecting unit of detecting unit and photodetector 14a configuration and the presumptive area that is arranged to electromagnetic wave spectrum 1001, is responsive and form this to the wave filter 12b and the photodetector 14b configuration of second detecting unit of detecting unit and the wavelength region may that is arranged to the basic complementation of electromagnetic wave spectrum 1000.The spectral responsivity of first detecting unit and second detecting unit overlaps at the predetermined wavelength range of electromagnetic wave spectrum, this predetermined wavelength range for example is the green glow zone, and therefore this configuration of a pair of detecting unit can be used for assessing light intensity and the peak wavelength of launching in this predetermined wavelength range.In addition, the spectral responsivity of first detecting unit increases according to wavelength is dull in this predetermined wavelength range substantially, and the spectral responsivity of second detecting unit reduces according to the wavelength dullness in this predetermined wavelength range substantially.
In an embodiment of the present invention, wherein detecting unit configuration as shown in Figure 3 haply is respectively R if incident light 11 has the spectral responsivity of relative spectral power distribution I (λ) and first detecting unit (wave filter 12a and photodetector 14a) and second detecting unit (wave filter 12b and photodetector 14b)
a(λ) and R
a(λ), then this output to detecting unit is respectively V
a=∫
λI (λ) R
a(λ) d λ and V
b=∫
λI (λ) R
b(λ) d λ.Relative spectral power distribution I (λ) remains unchanged if the intensity I of incident light 11 changes, then this to the corresponding output of detecting unit with and merchant V
a/ V
bAlso keep constant substantially.On the other hand, if the relative spectral power distribution I (λ) of incident light 11 changes, then this to the corresponding output of detecting unit with and the merchant also change.If the variation of relative spectral power distribution I (λ) is characterized by peak wavelength shift, change in the time of intensity I and relative spectral power distribution I (λ) and can on mathematics, separate, be confirmable therefore.
Further with reference to Figure 11, Figure 11 illustrates the comparison of the spectral responsivity 1000 of the spectral responsivity 1001 of first detecting unit (wave filter 12a and photodetector 14a) of a pair of detecting unit of the embodiment of the invention and this second detecting unit to detecting unit (wave filter 12b and photodetector 14b), and wherein this responsiveness to detecting unit overlaps in predetermined wavelength range.In an embodiment of the present invention, if the peak wavelength that relative spectral power distributes increases, then this output to first detecting unit of detecting unit will increase, and this output to second detecting unit of detecting unit will reduce.As example, if increase from the wavelength X of the incident light 11 of monochromatic source, then the output of first detecting unit will reduce, and the output of second detecting unit will increase.On the contrary, if the wavelength X of incident light 11 reduces, then the output of first detecting unit will increase, and the output of second detecting unit will reduce.For example, suppose that wavelength X remains within the predetermined wavelength range of spectrum, with respect to the minimum wavelength λ of the described predetermined wavelength range of spectrum
Min, wavelength and B+ (1-A)/(A+B) are proportional.Similarly, for example this wavelength can be proportional with merchant A/B, but normally in the littler mode of linear degree.
For example, when a pair of detecting unit disposes as shown in Figure 3, if distributing, the Strength Changes of incident light but peak wavelength and relative spectral power remain unchanged, then the output signal of two detecting units also changes, if but the characteristic of detecting unit suitably selected, then the merchant of its output signal remains unchanged.Usually, the incident light intensity does not influence this precision to the output of detecting unit.On the other hand, if the peak wavelength of incident light or relative spectral power changes in distribution, then this can be used for calibrating to the output signal of detecting unit and merchant thereof and for example determines light intensity and peak wavelength from LEE base luminaire.
This is measured by disposal system 18 output signal of each detecting unit of detecting unit, and this disposal system 18 comprises that galvanometer and those skilled in the art know is used to regulate adjunct circuit from this galvanometric signal.This corresponding output signal to detecting unit of disposal system 18 receptions also further disposes software, firmware waits one or more relations of assessing between these output signals.This this assessment to the output signal of detecting unit provides the light intensity that is used to assess in this predetermined wavelength range and the means of peak wavelength.
Control the application of the excitation of light-emitting component for for example using high-frequency impulse width haply or pulse code modulated, the incident light intensity can promptly change, therefore and may must in exited luminescent element, measure this output, thereby avoid because incident light changes the inconsistent of the measurement output that causes in time to detecting unit.Correspondingly, disposal system 18 can comprise such as parallel flash analog to digital converter or the such additional circuit (not shown) of sampling hold circuit, side by side to measure this output to detecting unit when the exited luminescent element.
In an embodiment of the present invention, at work, be used to implement the physical component of a pair of detecting unit, for example color filter 12a, 12b and photodetector 14a, 14b may not present perfection or approaching perfectly behavior.Therefore, for physically attainable spectral responsivity as shown in figure 11, the fixed ramp formula that is difficult to obtain with respect to wavelength decays.The result is that the intensity of incident light 11 and peak wavelength and this can become nonlinear to the relation between the output of detecting unit.For solve with this to detecting unit can realize physically that element is associated these are possible non-linear, in an embodiment of the present invention, this to the output of detecting unit can with the comparison that comprises optimal value, and these outputs can be reappraised to attempt this spectral responsivity linearization to detecting unit by analytic approximation.
With reference to Figure 12, the equipment of another embodiment of the present invention has been described.Equipment 100 comprises that optical coupled forms n detecting unit thus to a plurality of color filter 12a...12n of photodetector 14a...14n respectively, and this n detecting unit forms n/2 to detecting unit.Each detecting unit has the search coverage 16a...16n that is used for determining the sensor parameters relevant with peak wavelength with the intensity of incident light 110.This incident light 110 has a colour gamut, and this colour gamut is the combination of the light of the various wavelength of light-emitting component (not shown) generation, and each light-emitting component is created in the light that has particular range of wavelengths in the electromagnetic wave spectrum thus.In the graphic representation of the equipment 100 of Figure 12, color filter 12a, 12b, 12m and 12n and photodetector 14a, 14b, 14m and 14n only are shown.
In embodiments of the present invention, the output of photodetector 14a...14n is connected to disposal system 180, and this disposal system 180 can be assessed the sensor parameters from photodetector 14a...14n independently.This output to the m detecting unit of detecting unit can be proportional with peak wavelength divided by this merchant that output of the complementation n detecting unit of detecting unit is obtained.This merchant can be determined and be can be used for finding the solution the intensity of incident light 110 by disposal system 180.
With reference now to Figure 13,, the illuminator of the embodiment of the invention is shown.This illuminator comprises a plurality of light-emitting components 202,204 and 206, and these a plurality of light-emitting component emissions have the electromagnetic radiation of different peak wavelengths.In the embodiment of current description of the present invention, light-emitting component is LED, yet also can use the light-emitting component of the other types that those skilled in the art know.Light-emitting component 202,204 and 206 disposes and is arranged to red array, green array and blue array respectively.
In one embodiment, for example can provide collector lens 222 to strengthen the optics output of red array 202.Can provide similar collector lens 224 and 226 or alternative optical element for the blueness of light-emitting component and green array.
Can from red, green and blue array successively or the light of emission simultaneously the stable state optics output of the white light 110 that is formed by red, green and blue light color combination can be provided.In one embodiment, provide optical diffuser device 300, improve the white light 110 that the blend of colors homogeneity also produces basic even color thus thus further spatially to mix redness, green and the blue light color of this composition.
Further with reference to Figure 13, the wave filter 122 and the photodetector 142 that form first detecting unit form complementary pair with this second detecting unit to detecting unit that is formed by wave filter 123 and photodetector 143.In a comparable manner, form the 3rd wave filter 124 of the 3rd detecting unit and photodetector 144 and form a complementary pair, and form the 5th wave filter 126 of the 5th detecting unit and photodetector 146 and the 6th detecting unit that formed by wave filter 127 and photodetector 147 forms complementary pair with the 4th detecting unit that forms by wave filter 125 and photodetector 145.Wave filter 122,124 and 126 and photodetector 142,144 and 146 in each is disposed respectively and the presumptive area that is arranged to electromagnetic wave spectrum is responsive, and its corresponding complementary filter 123,125 and 127 and the roughly complementary region that is configured and is arranged to respectively electromagnetic wave spectrum of photodetector 143,145 and 147 be responsive.The result is, wave filter 122,124 and 126 and photodetector 142,144 and 146 and the wave filter 123,125 of respective complementary and 127 and the spectral responsivity of 143,145 and 147 pairs of photodetectors in a plurality of predetermined wavelength ranges (for example red wavelength range, blue wavelength region and green wavelength scope) of electromagnetic wave spectrum, overlap.In addition, wave filter 122,124 and 126 and the spectral responsivity of photodetector 142,144 and 146 in each described predetermined wavelength range, increase according to wavelength is dull substantially, and the wave filter 123,125 of its respective complementary and 127 and the spectral responsivity of photodetector 143,145 and 147 in each described predetermined wavelength range, reduce according to the wavelength dullness substantially, wherein each described predetermined wavelength range comprises that respectively the expection of the peak wavelength of light-emitting component 202,204 and 206 changes.
In an embodiment of the present invention, the output of photodetector 142 to 147 is connected to disposal system 280, and this disposal system 280 can be measured the output signal from photodetector 142 to 147 independently.Wave filter 122,124 and 126 and the output of photodetector 142,144 and 146 divided by its corresponding respectively wave filter 123,125 and 127 and the merchant that obtains of the output of photodetector 143,145 and 147 can be respectively proportional with the peak wavelength of red, green and blue light.Each merchant can and can be used for finding the solution the intensity of incident light 110 by disposal system 280 assessments.This disposal system 280 can further dispose, thereby is evaluated at the peak wavelength of the light of emission in each this predetermined wavelength range.
In an embodiment of the present invention, drive circuit 400 modules that are coupled to light-emitting component 202,204 and 206 can be configured to produce drive signal, are used for independently or the ground driven light-emitting element 202,204 and 206 that interdepends.Controller 500 can be communicated by letter with drive circuit 400.Controller 500 can be waited by microprocessor and implement and can control the magnitude of current that supplies to each light-emitting component 202,204 and 206.In an embodiment of the present invention, the additive method that can use pulse-length modulation, pulse code modulated or those skilled in the art to understand easily to the control of the electric current that supplies to light-emitting component carries out.
In another embodiment of the present invention, disposal system 280 and controller 500 can be integrated in the same calculation element.
Obviously, previous embodiment of the present invention is exemplary and can changes by many modes.These current or following modification are not regarded as departing from the spirit and scope of the present invention, and obvious as those skilled in the art, and all these adjustment are intended to be comprised within the scope of following claim.
All patents of quoting in this manual, comprise the publication of disclosed patented claim and the disclosure of data base entries, it is incorporated into this in full by reference particularly, and these single patents, publication and data base entries specifically and are respectively shown incorporated herein by reference as each.
Claims (21)
1. one kind is used for determining the intensity of light in one or more predetermined wavelength ranges and the equipment of peak wavelength, and this equipment comprises:
A) be used to detect one or more pairs of detecting units of this light, first detecting unit of a pair of detecting unit is configured to detect with the first predetermined spectral response degree first intensity of the light in first predetermined wavelength range, and second detecting unit of a pair of detecting unit is configured to detect with the second predetermined spectral response degree second intensity of the light in first predetermined wavelength range; And
B) but the place of working is connected to the disposal system of these one or more pairs of detecting units, this disposal system is configured to according to the relation of the one or more predefined functions between each intensity in this first intensity and second intensity, determines the intensity and the peak wavelength of each predetermined wavelength range in these one or more predetermined wavelength ranges of this light.
2. equipment as claimed in claim 1, wherein these one or more detecting units comprise broadband optical sensor and wave filter, this filter configuration becomes definition to be used for the predetermined wavelength range of this detecting unit.
3. equipment as claimed in claim 1, wherein these one or more detecting units comprise the narrowband optical sensor that is configured to define the predetermined wavelength range that is used for this detecting unit.
4. equipment as claimed in claim 1 also comprises the 3rd detecting unit, and the 3rd detecting unit is configured to have spectral responsivity in this first predetermined wavelength range.
5. equipment as claimed in claim 1, wherein this first predetermined spectral response degree and the similar substantially and wavelength shift relative to one another of this second predetermined spectral response degree.
6. equipment as claimed in claim 1, wherein this first predetermined spectral response degree descends at first's substantially constant and at this predetermined wavelength range ramp type, and this second predetermined spectral response degree rises to the substantially constant level at this predetermined wavelength range ramp type.
7. equipment as claimed in claim 1, wherein this first predetermined spectral response degree descends at first's substantially constant and at this predetermined wavelength range ramp type, and this second predetermined spectral response degree descends at this first's substantially constant and at subsequently this predetermined wavelength range ramp type.
8. equipment as claimed in claim 1, wherein this first predetermined spectral response degree is narrow fully in first wavelength coverage, and this second predetermined spectral response degree is narrow fully in second wavelength coverage, and wherein this first and second wavelength coverage is in this predetermined wavelength range.
9. equipment as claimed in claim 2, wherein this first detecting unit comprises the wave filter with first thickness, and this second detecting unit comprises the wave filter with second thickness bigger than this first thickness.
10. equipment as claimed in claim 1, wherein this disposal system comprises neural network.
11. equipment as claimed in claim 10, wherein this neural network is radial basis function or broad sense radial basis function.
12. equipment as claimed in claim 1 also comprises temperature sensor, this temperature sensor is configured to survey the working temperature of these one or more pairs of detecting units.
13. equipment as claimed in claim 1, also comprise one or more wave filters, this filter configuration becomes to stop that the optical wavelength outside the specific predetermined wavelength range arrives these one or more pairs of detecting units that are configured to survey the light in this specific predetermined wavelength range.
14. equipment as claimed in claim 1, wherein first pair of detecting unit is configured in response to this first predetermined wavelength range, second pair of detecting unit is configured in response to second predetermined wavelength range, and the 3rd pair of detecting unit is configured in response to the 3rd predetermined wavelength range.
15. equipment as claimed in claim 14, wherein this first predetermined wavelength range is the red wavelength part, and this second predetermined wavelength range is the green wavelength part, and the 3rd predetermined wavelength range is the blue wavelength part.
16. one kind is used for determining the intensity of light in predetermined wavelength range and the method for peak wavelength, the method comprising the steps of:
A) detect first intensity of this light in this predetermined wavelength range with the first predetermined spectral response degree;
B) detect second intensity of this light in this predetermined wavelength range with the second predetermined spectral response degree; And
C) use predefined function between this first intensity and second intensity to concern to determine intensity and peak wavelength in this predetermined wavelength range.
17. method as claimed in claim 16, wherein this determining step uses one or more analytical algorithms, one or more numerical algorithm or these two to carry out.
18. method as claimed in claim 16, wherein this determining step also comprises the step of the measure spectrum responsiveness of resolving these one or more pairs of detecting units of sharpening.
19. method as claimed in claim 18, wherein this parsing sharpening use sharpening is changed and is carried out.
20. method as claimed in claim 19, wherein this sharpening conversion configurations becomes to reduce signal to noise ratio (S/N ratio).
21. one kind is used for determining the intensity of light in predetermined wavelength range and the equipment of peak wavelength, this equipment comprises:
A) be used to detect first detecting unit of this light, this first detecting unit is configured to detect with the first predetermined spectral response degree first intensity of this light in this predetermined wavelength range;
B) but the place of working is connected to the disposal system of this first detecting unit, this disposal system is configured to resolve this first predetermined spectral response degree of this first detecting unit of sharpening, produce second intensity of this light thus, this disposal system also is configured to concern to determine according to the one or more predefined functions between this first intensity and second intensity intensity and the peak wavelength of this predetermined wavelength range of this light.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2552133 | 2006-07-18 | ||
| CA2,552,133 | 2006-07-18 | ||
| US60/807,914 | 2006-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101501465A true CN101501465A (en) | 2009-08-05 |
Family
ID=40947400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800553910A Pending CN101501465A (en) | 2006-07-18 | 2006-11-17 | Method and apparatus for determining intensities and peak wavelengths of light |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101501465A (en) |
| BR (1) | BRPI0621884A2 (en) |
| RU (1) | RU2009105488A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667428A (en) * | 2009-11-19 | 2012-09-12 | 百超激光股份公司 | Method and device for determining a characteristic of a beam, by means of a rotating disc, in particular in a laser processing machine |
| CN104040309A (en) * | 2011-11-03 | 2014-09-10 | 威利食品有限公司 | Low-cost spectrometry system for end-user food analysis |
| CN104769397A (en) * | 2012-09-30 | 2015-07-08 | 圣戈本陶瓷及塑料股份有限公司 | Photosensor testing apparatus, a radiation detection apparatus including a photosensor and a method of selecting the photosensor for the radiation detection apparatus |
| US10066990B2 (en) | 2015-07-09 | 2018-09-04 | Verifood, Ltd. | Spatially variable filter systems and methods |
| CN109313295A (en) * | 2016-06-03 | 2019-02-05 | 3M创新有限公司 | Optical light filter with the microreplicated layer of spatial variations |
| US10203246B2 (en) | 2015-11-20 | 2019-02-12 | Verifood, Ltd. | Systems and methods for calibration of a handheld spectrometer |
| CN109642823A (en) * | 2016-05-30 | 2019-04-16 | 西利奥斯技术公司 | The method for limiting the crosstalk in imaging sensor |
| US10648861B2 (en) | 2014-10-23 | 2020-05-12 | Verifood, Ltd. | Accessories for handheld spectrometer |
| US10760964B2 (en) | 2015-02-05 | 2020-09-01 | Verifood, Ltd. | Spectrometry system applications |
| US10791933B2 (en) | 2016-07-27 | 2020-10-06 | Verifood, Ltd. | Spectrometry systems, methods, and applications |
| US10942065B2 (en) | 2013-08-02 | 2021-03-09 | Verifood, Ltd. | Spectrometry system with decreased light path |
| CN112834034A (en) * | 2020-12-31 | 2021-05-25 | 南京杰思尔环保智能科技有限公司 | Neuron network correction wavelength UV generator and method based on single chip microcomputer |
| US11067443B2 (en) | 2015-02-05 | 2021-07-20 | Verifood, Ltd. | Spectrometry system with visible aiming beam |
| US11118971B2 (en) | 2014-01-03 | 2021-09-14 | Verifood Ltd. | Spectrometry systems, methods, and applications |
| CN113692524A (en) * | 2019-03-27 | 2021-11-23 | ams传感器新加坡私人有限公司 | Self-calibrating spectral sensor module |
| US11378449B2 (en) | 2016-07-20 | 2022-07-05 | Verifood, Ltd. | Accessories for handheld spectrometer |
| US12044617B2 (en) | 2018-10-08 | 2024-07-23 | Verifood, Ltd. | Accessories for optical spectrometers |
-
2006
- 2006-11-17 BR BRPI0621884-9A patent/BRPI0621884A2/en not_active Application Discontinuation
- 2006-11-17 CN CNA2006800553910A patent/CN101501465A/en active Pending
- 2006-11-17 RU RU2009105488/28A patent/RU2009105488A/en unknown
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667428A (en) * | 2009-11-19 | 2012-09-12 | 百超激光股份公司 | Method and device for determining a characteristic of a beam, by means of a rotating disc, in particular in a laser processing machine |
| CN104040309A (en) * | 2011-11-03 | 2014-09-10 | 威利食品有限公司 | Low-cost spectrometry system for end-user food analysis |
| US9587982B2 (en) | 2011-11-03 | 2017-03-07 | Verifood, Ltd. | Low-cost spectrometry system for end-user food analysis |
| US11237050B2 (en) | 2011-11-03 | 2022-02-01 | Verifood, Ltd. | Low-cost spectrometry system for end-user food analysis |
| US10704954B2 (en) | 2011-11-03 | 2020-07-07 | Verifood, Ltd. | Low-cost spectrometry system for end-user food analysis |
| US10323982B2 (en) | 2011-11-03 | 2019-06-18 | Verifood, Ltd. | Low-cost spectrometry system for end-user food analysis |
| CN104769397A (en) * | 2012-09-30 | 2015-07-08 | 圣戈本陶瓷及塑料股份有限公司 | Photosensor testing apparatus, a radiation detection apparatus including a photosensor and a method of selecting the photosensor for the radiation detection apparatus |
| US11988556B2 (en) | 2013-08-02 | 2024-05-21 | Verifood Ltd | Spectrometry system with decreased light path |
| US10942065B2 (en) | 2013-08-02 | 2021-03-09 | Verifood, Ltd. | Spectrometry system with decreased light path |
| US11624651B2 (en) | 2013-08-02 | 2023-04-11 | Verifood, Ltd. | Spectrometry system with decreased light path |
| US11781910B2 (en) | 2014-01-03 | 2023-10-10 | Verifood Ltd | Spectrometry systems, methods, and applications |
| US11118971B2 (en) | 2014-01-03 | 2021-09-14 | Verifood Ltd. | Spectrometry systems, methods, and applications |
| US10648861B2 (en) | 2014-10-23 | 2020-05-12 | Verifood, Ltd. | Accessories for handheld spectrometer |
| US11333552B2 (en) | 2014-10-23 | 2022-05-17 | Verifood, Ltd. | Accessories for handheld spectrometer |
| US11320307B2 (en) | 2015-02-05 | 2022-05-03 | Verifood, Ltd. | Spectrometry system applications |
| US10760964B2 (en) | 2015-02-05 | 2020-09-01 | Verifood, Ltd. | Spectrometry system applications |
| US11067443B2 (en) | 2015-02-05 | 2021-07-20 | Verifood, Ltd. | Spectrometry system with visible aiming beam |
| US11609119B2 (en) | 2015-02-05 | 2023-03-21 | Verifood, Ltd. | Spectrometry system with visible aiming beam |
| US10066990B2 (en) | 2015-07-09 | 2018-09-04 | Verifood, Ltd. | Spatially variable filter systems and methods |
| US10203246B2 (en) | 2015-11-20 | 2019-02-12 | Verifood, Ltd. | Systems and methods for calibration of a handheld spectrometer |
| CN109642823A (en) * | 2016-05-30 | 2019-04-16 | 西利奥斯技术公司 | The method for limiting the crosstalk in imaging sensor |
| CN109313295B (en) * | 2016-06-03 | 2021-10-08 | 3M创新有限公司 | Optical filter with spatially varying microreplicated layer |
| CN109313295A (en) * | 2016-06-03 | 2019-02-05 | 3M创新有限公司 | Optical light filter with the microreplicated layer of spatial variations |
| US11378449B2 (en) | 2016-07-20 | 2022-07-05 | Verifood, Ltd. | Accessories for handheld spectrometer |
| US10791933B2 (en) | 2016-07-27 | 2020-10-06 | Verifood, Ltd. | Spectrometry systems, methods, and applications |
| US12044617B2 (en) | 2018-10-08 | 2024-07-23 | Verifood, Ltd. | Accessories for optical spectrometers |
| CN113692524A (en) * | 2019-03-27 | 2021-11-23 | ams传感器新加坡私人有限公司 | Self-calibrating spectral sensor module |
| CN112834034A (en) * | 2020-12-31 | 2021-05-25 | 南京杰思尔环保智能科技有限公司 | Neuron network correction wavelength UV generator and method based on single chip microcomputer |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0621884A2 (en) | 2011-12-20 |
| RU2009105488A (en) | 2010-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101501465A (en) | Method and apparatus for determining intensities and peak wavelengths of light | |
| US7894050B2 (en) | Method and apparatus for determining intensities and peak wavelengths of light | |
| Lau et al. | A low-cost optical sensing device based on paired emitter–detector light emitting diodes | |
| US6600562B1 (en) | Method of extended color sense and estimation for RGB LED illuminants | |
| CN105241575B (en) | Intensity based on broadband fluorescence spectrum compares temp measuring method | |
| JPH10508940A (en) | Apparatus and method for measuring and analyzing spectral radiation mainly for measuring and analyzing color characteristics | |
| US20070035740A1 (en) | Optical instrument | |
| CN101925805A (en) | Spectrally compensating light sensor | |
| US20080043245A1 (en) | Methods and apparatus for measuring multiple fabry-perot gaps | |
| CN101680804A (en) | Spectrophotometer and method | |
| CN101874401A (en) | One chip image sensor for measuring vitality of subject | |
| JPWO2013147038A1 (en) | Material property measuring device | |
| KR20150077302A (en) | Sensor apparatus and method based on wavelength centroid detection | |
| CN105910708B (en) | A kind of method and device that characteristic excitation spectra is detected using fluorescent optical sensor | |
| EP2243011A1 (en) | Color detector having area scaled photodetectors | |
| JP5082622B2 (en) | Spectral characteristic measuring device, Spectral characteristic measuring system | |
| EP3043159B1 (en) | Method for processing light sensor signals and light sensor system | |
| KR101165720B1 (en) | Portable biophotonic sensor measurement apparatus and the measuring method of the same | |
| Faragó et al. | Low-cost Quasi-distributed position sensing platform based on blue fluorescent optical fiber | |
| Ohashi et al. | Simultaneous acquisition of color and distance information by LiDAR with RGB visible laser diodes | |
| WO2024175709A1 (en) | Factory or in-field calibration of thermo-electric and thermo-optical properties | |
| WO2024175710A1 (en) | Correction of nir spectrum based on forward voltage measurement | |
| US20240183712A1 (en) | A spectral sensing system | |
| WO2024175712A1 (en) | In field wavelength calibration of a wavelength scale of a spectrometer device | |
| WO2024175726A1 (en) | Driving led with pulse modulation scheme having variable duty cycle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V. Free format text: FORMER OWNER: TIR SCIENTIFIC + TECHNICAL CORPORATION Effective date: 20090814 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20090814 Address after: Holland Ian Deho Finn Applicant after: Koninklijke Philips Electronics N.V. Address before: Canadian British Columbia Applicant before: TIR Technology LP |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090805 |