CN110686777A - Spectrum measuring method and device - Google Patents
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Abstract
The embodiment of the invention provides a spectral measurement method and a spectral measurement device, wherein the spectral measurement device mainly comprises: the optical filter array is formed by arranging a plurality of optical filters with different transmission spectrums according to a preset array, and the optical filters are used for transmitting light rays to be detected; the image acquisition module is used for acquiring the light intensity of the transmission light of each optical filter on the optical filter array to obtain a light intensity array image; and the data processing module calculates to obtain the spectrum of the light to be measured according to the light intensity matrix in the light intensity array image and the transmission spectrum matrix of the preset optical filter array. By adopting the combination mode of the optical filter array and the image acquisition module, the light intensity matrix of the light to be measured after being transmitted by the optical filter array is acquired, the spectrum of the light to be measured is obtained by combining the transmission spectrum of each optical filter and calculating through a multivariate matrix, the traditional slit and grating are not needed, the intensity and the utilization rate of incident light are greatly improved, the spectral resolution and the measurement range can be flexibly adjusted according to requirements, the structure is greatly simplified, and the cost is greatly reduced.
Description
Technical Field
The present invention relates to the field of measurement technologies, and in particular, to a spectral measurement method and a spectral measurement apparatus.
Background
The spectrum is a pattern in which the individual monochromatic light components in the polychromatic light are arranged in order by wavelength or the distribution of the light intensity of the individual monochromatic light by wavelength. The spectrometer is an instrument that decomposes light having a complex composition into spectral lines and measures the spectrum. The LED color temperature and color rendering index sensor is widely applied to important fields of environment monitoring, lamp testing, LED brightness, color temperature and color rendering index, industrial control, chemical analysis, food quality detection, material analysis, clinical examination, aerospace remote sensing, scientific education and the like.
The existing spectrometer mainly comprises an incident slit, a collimating element, a dispersion element, a focusing element, a detection element and other components, wherein an object point of a spectrometer imaging system is formed under the irradiation of incident light, so that light rays emitted by the slit are changed into parallel light, and the collimating element can be an independent lens, a reflecting mirror or be directly integrated on the dispersion element. Optical signals are typically dispersed spatially by wavelength using gratings or prisms, and the dispersed beams are now focused primarily by gratings to form a series of images of the entrance slit at the focal plane, where each image point corresponds to a particular wavelength. The complex-composition monochromatic light is decomposed into monochromatic lights separated spatially according to the wavelength.
In the existing spectrum measurement method, only a narrow light beam is allowed to enter a spectrometer through an entrance slit, so that the problem that the resolution is reduced due to the fact that light with different wavelengths is overlapped in space after light beam splitting is reduced to the maximum extent, and the narrower the entrance slit of a high-resolution spectrometer is. In order to improve the spectral resolution, the grating is very precise, and one millimeter reaches hundreds or even thousands of etched lines, so that not only is the cost of the grating high, but also only 1% of the light intensity of the grating is available after light splitting. The light coming from the slit is already weak, 99% of the light is not available, the remaining 1% is spread out in space, and only a part of the 1% falls on the detecting element, so that the utilization rate is very low. In order to spread the split light sufficiently in space, the detecting element needs to be separated from the dispersing element by a sufficient distance, and the spectrometer has to be made large in size by adding complex collimation and light-gathering optical paths. Generally, a spectrometer is equipped with different gratings according to a measurement range, such as a visible light range, an infrared range, an ultraviolet range, etc., and the grating position, the detector position and the optical path are fixed, and if the measurement range needs to be changed, not only the grating needs to be replaced, but also the optical path, the detection element and the position thereof need to be changed, so that the operation is complicated.
Disclosure of Invention
In view of the above problems, embodiments of the present invention are proposed to provide a spectral measuring method and a corresponding spectral measuring apparatus that overcome the above problems.
In order to solve the above problem, an embodiment of the present invention discloses 1 a spectrum measuring apparatus, including:
the optical filter array is formed by arranging a plurality of optical filters with different transmission spectrums according to a preset array, and the optical filters are used for transmitting light rays to be detected;
the image acquisition module is used for acquiring the transmission light intensity of each optical filter on the optical filter array and obtaining a light intensity array image;
and the data processing module calculates to obtain the spectrum of the light to be measured according to the light intensity matrix in the light intensity array image and a transmission spectrum matrix preset in the optical filter array.
Further, the image acquisition module comprises a CCD image sensor or a COMS image sensor.
Further, the number of the optical filters is equal to the number of the positions of the wavelength to be measured of the light to be measured.
Further, adjacent filters in the filter array are physically isolated from each other.
Furthermore, the optical filter array comprises an optical filter frame with grids and a plurality of optical filters, the optical filters are fixed on the grids, and light-tight materials are adopted for blocking the optical filters.
Further, the transmission spectra of the optical filters do not have a linear relationship or a linear superposition relationship with each other.
Further, the optical filter array is arranged opposite to the image acquisition module.
The embodiment of the invention discloses a spectral measurement method, which comprises the following steps:
collecting a light intensity array image transmitted on the optical filter array, wherein the optical filter array is formed by arranging a plurality of optical filters with different transmission spectrums according to a preset array;
and calculating to obtain the spectrum of the light to be measured according to the light intensity matrix in the light intensity array image and a transmission spectrum matrix preset in the optical filter array.
The embodiment of the invention discloses an electronic device, which comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein when the computer program is executed by the processor, the steps of the spectral measurement method are realized.
The embodiment of the invention discloses a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the steps of the spectral measurement method are realized.
The embodiment of the invention has the following advantages: the light intensity matrix of the light to be measured after being transmitted by the light filter array is acquired by adopting a combination mode of the light filter array and the image acquisition module, the spectrum of the light to be measured is obtained by combining the transmission spectrum of each light filter and calculating through a multivariate matrix, and the method of slit incidence and grating (or prism) light splitting of a spectrometer commonly adopted by the existing spectrometer is not needed, so that the method and the device are a brand new spectrum measurement method and device, the intensity and the utilization rate of the incident light are greatly improved, the resolution and the measurement range of the image acquisition module can be flexibly adjusted according to requirements, the structure is greatly simplified, and the cost is greatly reduced.
Drawings
FIG. 1 is a block diagram of a spectral measuring device according to an embodiment of the present invention;
FIG. 2 is a block flow diagram of the steps of one embodiment of a method of spectral measurement in one embodiment of the present invention;
FIG. 3 is a block diagram of an embodiment of a filter array according to the invention;
fig. 4 shows transmission spectra of three filters in the filter array according to an embodiment of the invention.
1 light to be measured, 2 optical filter arrays, 3 white screens, 4 image acquisition modules, 21 optical filters and 22 optical filter frames
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
One of the core ideas of the embodiments of the present invention is to provide a spectrum measuring apparatus, including: the optical filter 21, the white screen 3, the image acquisition module 4 and the data processing module, the optical filter 21 arranges according to presetting the array and forms the optical filter array 2, the white screen 3 locates between optical filter 21 and the image acquisition module 4 and presses close to the optical filter array 2, if the overall dimension of the optical filter array 2 is equal to or less than the photosurface of the image acquisition module 4, can not set up the white screen 3, directly hug closely the optical filter array 2 on the photosurface of the image acquisition module 4, the image acquisition module 4 is connected with the data processing module. By adopting the combination mode of the optical filter array 2 and the image acquisition module 4, the transmission light intensity of the light to be measured after passing through the optical filter array is acquired, the spectrum of the light to be measured is obtained by combining the transmission spectrum of each optical filter 21 and calculating the multivariate matrix, the slit incidence and grating (or prism) light splitting method generally adopted by the existing spectrograph is not needed, the intensity and the utilization rate of the incident light are greatly improved, the resolution and the measurement range can be flexibly adjusted according to the requirements, the structure is greatly simplified, and the cost is greatly reduced.
Referring to fig. 1, a block diagram of a spectrum measuring apparatus according to an embodiment of the present invention is shown, which may specifically include: the light filter 21, the white screen 3, the image acquisition module 4 and the data processing module, the light filter 21 is arranged according to the predetermined array and forms the light filter array 2, the white screen 3 is arranged between the light filter 21 and the image acquisition module 4, and the image acquisition module 4 is connected with the data processing module. The spectrum measuring device in the embodiment does not need a light splitting step, only receives incident light to be measured through the optical filter array 2, the white screen 3 is arranged on the back of the optical filter array 2, the light to be measured transmitted after passing through the optical filter array 2 forms a clear light intensity array on the white screen 3, the image acquisition module 4 is arranged behind the white screen 3, the image acquisition module 4 acquires the light intensity array on the white screen 3 into an image, the white screen 3 is not arranged in other embodiments, the image acquisition module 4 directly acquires the transmitted light intensity of the optical filter array 2 to obtain a light intensity array image, the light intensity array image is transmitted to the data processing module, the data processing module acquires the light intensity of the light intensity according to the light intensity array, and the spectrum of the incident light is calculated by combining the known transmitted spectrum of each optical filter on the optical filter array 2. In a specific embodiment, the image capturing module 4 is specifically configured as a CCD camera, the CCD camera captures a light intensity array on the white screen 3, and the light intensity array is captured by the CCD camera to form a picture, and the picture is transmitted to the data processing module, the CCD camera usually has several million or even ten million pixels, and the sensitivity of the CCD camera is much higher than that of a linear CCD detector in the existing spectrometer, the CCD camera is used to capture a light intensity image of the light filter 21 irradiated onto the white screen 3, the cost of the CCD camera is greatly reduced, the price of the common light filter 21 is much lower than that of a grating, and a common CCD camera can be used for optical signals higher than several orders of magnitude, which is much cheaper than a linear CCD with high sensitivity, and meanwhile, if a CCD with high sensitivity is also used, the sensitivity can also be higher than several orders. Because the CCD camera is used for directly shooting the light-transmitting image of the optical filter array 2, the light path space of collimation and dispersion is not needed, the size can be very small, the structure is compact, and the light weight and the miniaturization of the detection equipment are realized. In other embodiments, the image capturing module 4 may further employ a CMOS image capturing unit, which is specifically a camera employing a CMOS image sensor, which is a typical solid-state imaging sensor. The CMOS image sensor generally comprises an image sensor cell array, a row driver, a column driver, a timing control logic, an AD converter, a data bus output interface, a control interface, etc., which are usually integrated on the same silicon chip. The working process can be generally divided into a reset part, a photoelectric conversion part, an integration part and a reading part.
In the present embodiment, the filter array 2 is composed of several filters 21 with different transmittances. The filters 21 are spliced into a planar array, the array may be a square array or a rectangular array of a determinant, or may be an array of a circular arrangement, and the arrangement of the array is not limited in the present application. The material of the filter 21 includes glass, organic materials, quartz, etc., and may be various color dyes printed on a transparent medium, including but not limited to transparent glass. The optical filter 21 in the present application is manufactured by coating, coloring, doping or using the light transmission characteristics of the material itself, and the transmission spectra of all the optical filters 21 in the optical filter array 2 do not have a linear relationship or a linear superposition relationship.
In the present embodiment, the number of filters 21 is equal to the number of wavelength positions of incident light. The spectrum measuring device in the embodiment has the advantage of adjustable spectrum wavelength resolution, the resolution of the spectrum depends on the interval of adjacent wavelengths, the number of wavelength measuring points in the embodiment is equal to the number of the optical filters 21, therefore, the resolution of the spectrum wavelength can be improved by increasing the number of the optical filters 21, the optical filters 21 are convenient to replace, only different optical filter arrays 2 need to be replaced for changing the measuring range or the resolution, the number M of the optical filters 21 in the optical filter array 2 is equal to the number N of the measured wavelength positions, namely, M is equal to N, if M is greater than N, the transmission light intensity and the transmission spectrum of the N optical filters 21 are selected for subsequent calculation, and the calculation is flexible.
In the present embodiment, the adjacent filters 21 in the filter array 2 are blocked by an opaque material. An opaque material is disposed between adjacent filters 21 in the filter array 2, and in a specific embodiment, the opaque material is black plastic or metal, and the light filters 21 are separated by the opaque material, so that mutual interference of light rays can be effectively prevented, and accuracy of a detection result is improved.
In the present embodiment, the filter array 2 includes a filter frame 22 with a grid and a plurality of filters 21, and the filters 21 are fixedly mounted in the grid. In a specific embodiment, different specifications of the optical filter 21 matrix may be adopted in different applications, the number of the optical filters 21, the types of the optical filters 21, and the material of the optical filters 21 may be changed according to specific requirements, the material of the optical filter 21 in a specific embodiment includes glass, organic materials, quartz, and the like, and may also be various dyes printed on a transparent medium, the manufacturing method of the optical filter 21 may be coating, coloring, or utilizing the light transmission property thereof, the shape of the optical filter 21 in a specific embodiment may be set to be a square, a rectangle, a circle, or other geometric shapes, the shape of the optical filter 21 in the specific embodiment is not limited in the present application, and similarly, the size and the thickness of the optical filter 21 may be. The arrangement mode of the optical filter array 2 includes a square array, a rectangular array or a circular array, etc., the size and shape of each optical filter 21 are the same or similar, the shape of the optical filter 21 can be square, rectangular, circular or other geometric shapes, the size of the optical filter 21 can be set according to specific requirements, and the diameter of the optical filter 21 is between 1 micron and 1 cm.
In a specific embodiment, the number of pixels, the resolution and the sensitivity of the CCD camera can be selected according to specific needs. To increase the detection accuracy and precision, other auxiliary optical lenses and devices may be added.
In the present embodiment, the size of the white screen 3 is equal to or larger than the size of the filter array 2. The white screen 3 is positioned behind the optical filter array 2, the set size of the white screen 3 is equal to or larger than that of the optical filter array 2, the white screen 3 is tightly attached to the optical filter array 2 and can keep a small distance with the optical filter array 2, and the purpose is to enable the transmission light of the optical filter array 2 to form a light intensity array with clear edges on the white screen 3. The white screen 3 in this embodiment is made of a white diffuse reflection material, and the white screen 3 has a strong transmittance and a low absorption for light in the entire wavelength range of spectral measurement, and its transmission spectrum and absorption spectrum are known or can be accurately measured. The thickness and the density of the white screen 3 are uniform, and the transmission light intensity of the filter array 2 can be seen or photographed clearly on the back surface of the white screen.
In the present embodiment, the white screen 3 is disposed close to the filter array 2. Adopt above-mentioned white 3 light intensity arrays that show the filter array of screen to can be shot by the CCD camera, and then calculate by data processing module and draw the spectrum, do not need the slit to advance light, also do not need grating or prism beam split, whole light filter array 2 direct receiving awaits measuring the light irradiation, light signal intensity is greater than the slit far away. The transmittance of the optical filter 21 and the white screen 3 is far higher than the 1% utilization rate of the grating, so that the intensity of the optical signal can be greatly improved relative to the mode of the grating. The CCD camera is arranged behind the white screen 3, the light intensity array image on the white screen 3 can be clearly shot, the pixel resolution and the sensitivity of the CCD camera are selected as required, the response curves of the CCD camera to light rays with different wavelengths are known, and the CCD camera can have strong enough response in the whole wavelength range of spectral measurement.
The spectral measuring device in one embodiment may further include some auxiliary optical lenses and devices to obtain a clearer and more accurate transmitted light intensity image of more uniform incident light.
The disclosed spectral measurement device of this embodiment does not need the slit to advance light, and whole optical filter array 2 direct receiving awaits measuring light shines, and the transmissivity of optical filter 21 and white screen 3 is higher than the 1% utilization ratio of grating far away, and light signal intensity has greatly promoted. The CCD camera has millions to tens of millions of pixels, and the sensitivity of the CCD camera is far higher than that of a linear CCD detector in the existing spectrometer; the price of the common optical filter 21 is far lower than that of the grating, and the optical signal which is higher by several orders of magnitude can be obtained by using a common CCD camera, so that the cost is greatly reduced compared with a linear CCD with high sensitivity. The resolution ratio of spectrum depends on the interval of adjacent wavelength, and the quantity of the wavelength measuring point of this application equals with filter 21 quantity, can improve the resolution ratio of spectral wavelength through increasing filter 21 quantity, changes measuring range or resolution ratio and only needs to change different filter array 2, and easy operation is convenient. The CCD camera is used for directly shooting the light-transmitting image of the optical filter array 2, the collimating and dispersive light path space is not needed, the size is reduced, the structure is simple and compact, and the method is a brand new spectrum measurement method.
Referring to fig. 2, a flowchart illustrating steps of an embodiment of the spectrum detection method of the present invention is shown, which may specifically include the following steps:
s1, collecting the transmitted light intensity array image on the optical filter array, wherein the optical filter array is formed by arranging a plurality of optical filters with different transmission spectrums according to a preset array;
and S2, calculating to obtain the spectrum of the light to be measured according to the light intensity matrix in the light intensity array image and the transmission spectrum matrix of the preset optical filter array.
In this embodiment, the method of measuring spectra using a filter array does not require an entrance slit, nor a grating to spatially spread the light according to wavelength. The spectrum measuring device is utilized to irradiate light rays to be measured onto the optical filter array, the transmitted light forms a light intensity array on the white screen behind the optical filter array, the CCD camera takes images of the light intensity array behind the white screen and transmits the images to the data processing module,and obtaining the light intensity transmitted by each optical filter on the optical filter array, listing a matrix equation according to the known transmission spectrum of each optical filter, namely the transmittance at each wavelength position, calculating the distribution of the light intensity of the measured light along with the wavelength, and obtaining the spectrum of the light to be measured. The number of the optical filters is the same as the number of the wavelength points to be measured, that is, N optical filters are required to calculate the light intensity of the measured optical signal at N wavelength positions. In the application, the light intensity P transmitted by each optical filter is equal to the light intensity X of the measured optical signal irradiated on the optical filter at the N wavelength positionsn(N is a positive integer of 1 to N) are multiplied by the transmittance alpha of the filter at the wavelength position, respectivelyn(N is a positive integer from 1 to N) and the sum of:
P＝X1α1+X2α2+...+Xnαn+XNαN
thus, each filter obtains a light intensity unknown X with N light intensity unknownsnThe equation of (N is a positive integer from 1 to N), N optical filters obtain N equations, and the light intensity of the measured light signal at N wavelength positions, that is, the distribution of the light intensity of the light to be measured along with the wavelength, can be obtained by solving the N-element linear equations (or matrix equations), thereby obtaining the spectrum of the measured light signal. The transmission spectra of all the filters have no linear or linear superposition relationship with each other, that is, the transmission spectrum of any one filter cannot be multiplied by a constant to obtain the same transmission spectrum as another filter, and the linear superposition with some other transmission spectrum or the transmission spectra of some filters cannot be obtained through the linear superposition of the transmission spectra of several filters, otherwise, the matrix equation has no solution.
In a specific embodiment, the spectral range of an unknown light source is 400nm-700nm, a 10 × 10 filter array composed of 100 filters with different transmission spectra is selected, as shown in fig. 3, each filter is 3mm × 3mm in size, and is embedded on a mesh frame made of black plastic, 1mm of space is formed between adjacent filters and is separated by a black plastic frame, so that mutual interference of light rays is avoided, and the size of the whole filter array is about 40mm × 40 mm.
The transmission spectrum of each filter in the filter array is different and has no linear relation or linear superposition relation, and referring to fig. 4, the transmission spectrum of three filters is illustrated to show that the range covers the whole or partial interval of the 400nm-700nm wave band, and has no linear relation or linear superposition relation, and the transmission spectrum of the other filters also has the same.
The schematic diagram of the measuring device is shown in fig. 1, the optical filter array faces a light source to be measured and is pulled away for a certain distance, so that incident light is approximately parallel light and has uniform illumination, the incident light penetrates through transmission light of the optical filter array to form a clear light intensity array with different colors and intensities on a white screen closely attached to the optical filter array, a CCD camera shoots an image of the light intensity array behind the white screen and transmits the image to a data processing module, only the light intensity is calculated without considering colors, only the light intensity of the same area in the center of each light intensity is calculated for accuracy, and then the relative intensity values of 100 transmission light intensities after the incident light passes through the optical filter array are obtained. According to the 100 pieces of transmitted light intensity data, the distribution of the light intensity of the incident light along with the wavelength, namely the spectrum, can be calculated by combining the transmission spectrum of each filter.
Referring to fig. 1, in one embodiment, each filter is numbered: the number of the filter from the 1 st filter at the upper left corner to the 100 th filter at the lower right corner is #1, #2, #3, # … and #100, and a wavelength position is taken every 3nm in the wavelength interval of 400nm-700nm, and the 100 wavelength positions are also numbered: lambda [ alpha ]1＝400nm、λ2＝403nm、λ3＝406nm、...、λ100＝697nm。
Since the transmission spectrum of each filter is known and can be accurately determined, the transmission of each filter at these 100 wavelength positions is known, setting the #1 filter at λ1Transmittance at wavelength is α11At λ2Transmittance at wavelength is α12…, at λ100Transmittance at wavelength is α1100By analogy, # n filter at λmTransmittance at wavelength is αnmThese are known amounts.
For measuring the light of a light source to be measuredAnd the spectrum can be obtained by calculating the light intensity of the incident light at each wavelength position. Parallel incident light is uniformly irradiated on the optical filter array, the size of each optical filter is the same, the incident light intensity on each optical filter can be determined to be the same, the incident light penetrates through the optical filter array to form a light intensity array with different colors and different intensities on a white screen behind the optical filter array, the CCD camera shoots an image of the light intensity array and transmits the image to the data processing device, the light intensity is only calculated without considering the colors, the transmission light intensity of the incident light behind each optical filter can be obtained, and the light intensity values are respectively P1、P2、…、Pn、…、P100。
Setting incident light on each filter at λ1Light intensity of wavelength X1At λ2Light intensity of wavelength X2…, at λmLight intensity of wavelength XmThen, for any one filter, such as # n filter, the total light intensity P transmitted by the incident lightnFor the sum of the transmitted light intensities of all wavelengths, i.e.: pn＝X1αn1+X2αn2+...+Xnαnm+X100αn100(wherein n represents # n filter, and m represents at λ)mAt a wavelength. ) This is a compound containing X1、X2、…、X100In total 100 unknowns of a 100-ary equation, 100 filters have 100 different 100-ary equations with no linear relationship:
writing into the form of a matrix equation is:
αX＝P
where α is a 100 × 100 square matrix of coefficients composed of the transmittances of 100 filters at 100 wavelength positions, respectively, X is a column vector of 100 unknown quantities, and P is a constant column vector composed of 100 measured light intensity data.
By solving the equation set (or matrix equation) composed of 100 linear equations with 100 elements, the equation set can be obtainedTo one set and only one set of unknowns X can be obtained1、X2、…、X100Finally, the X obtained by resolving the light intensity response curves of different wavelengths by using the transmission spectrum of the white screen and the CCD camera1、X2、…、X100The value is corrected to obtain the distribution of the light intensity of the incident light along with the wavelength, namely the spectrum. All the above calculations can be programmed to be performed by the data processing module and the results displayed on the screen.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
The embodiment of the invention discloses an electronic device, which comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein the computer program realizes the steps of the spectral measurement method when being executed by the processor.
The embodiment of the invention discloses a computer readable storage medium, a computer program is stored on the computer readable storage medium, and the steps of the spectral measurement method are realized when the computer program is executed by a processor.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above detailed description of the spectral measurement method and the spectral measurement apparatus provided by the present invention is provided, and the principle and the implementation of the present invention are explained in the present document by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A spectral measuring device, comprising:
the optical filter array is formed by arranging a plurality of optical filters with different transmission spectrums according to a preset array, and the optical filters are used for transmitting light rays to be detected;
the image acquisition module is used for acquiring the transmission light intensity of each optical filter on the optical filter array and obtaining a light intensity array image;
and the data processing module calculates to obtain the spectrum of the light to be measured according to the light intensity matrix in the light intensity array image and a transmission spectrum matrix preset in the optical filter array.
2. The apparatus of claim 1, wherein the image acquisition module comprises a CCD image sensor or a cmos image sensor.
3. The apparatus of claim 1, wherein the number of the optical filters is equal to the number of the wavelength positions to be measured of the light to be measured.
4. The apparatus of claim 1, wherein adjacent filters in the filter array are physically isolated from each other.
5. The apparatus of claim 4, wherein the filter array comprises a filter frame with a grid and a plurality of the filters, the filters are fixed on the grid, and the filters are blocked by an opaque material.
6. The apparatus of claim 1, wherein the transmission spectra of the filters do not contain a linear relationship or a linear superposition relationship with each other.
7. The apparatus of claim 1, wherein the filter array is disposed opposite the image acquisition module.
8. A method of spectral measurement, comprising:
collecting a light intensity array image transmitted on the optical filter array, wherein the optical filter array is formed by arranging a plurality of optical filters with different transmission spectrums according to a preset array;
and calculating to obtain the spectrum of the light to be measured according to the light intensity matrix in the light intensity array image and a transmission spectrum matrix preset in the optical filter array.
9. Electronic device, characterized in that it comprises a processor, a memory and a computer program stored on said memory and capable of running on said processor, said computer program, when being executed by said processor, realizing the steps of the spectral measurement method according to claim 8.
10. Computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the spectral measurement method as claimed in claim 8.
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|---|---|---|---|
| CN201911077770.5A CN110686777A (en) | 2019-11-06 | 2019-11-06 | Spectrum measuring method and device |
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| CN201911077770.5A CN110686777A (en) | 2019-11-06 | 2019-11-06 | Spectrum measuring method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114942069A (en) * | 2022-07-25 | 2022-08-26 | 长春长光辰谱科技有限公司 | Wide-spectrum micro spectrometer |
| CN115839767A (en) * | 2022-12-23 | 2023-03-24 | 南京伯克利新材料科技有限公司 | Device and method for spectrum identification and measurement |
-
2019
- 2019-11-06 CN CN201911077770.5A patent/CN110686777A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114942069A (en) * | 2022-07-25 | 2022-08-26 | 长春长光辰谱科技有限公司 | Wide-spectrum micro spectrometer |
| CN115839767A (en) * | 2022-12-23 | 2023-03-24 | 南京伯克利新材料科技有限公司 | Device and method for spectrum identification and measurement |
| CN115839767B (en) * | 2022-12-23 | 2023-10-20 | 南京伯克利新材料科技有限公司 | Device and method for spectrum identification and measurement |
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