TWI416084B - Portable Image Spectrometer - Google Patents

Abstract

Disclosed is a portable image spectrometer, including at least two band filters, at least two image capturing modules, and an image processing unit. The band filters are respectively provided to be penetrated by a light of characteristic band. The image capturing modules respectively generate, according to said light of characteristic band, a band image from the same object. The image processing unit is used for overlapping the aforementioned band images, and carries out spectral analysis to obtain spectral bands characteristic of the object. In this way, the present invention can provide light of different bands, and also capture images of different bands, thus enhancing the speed of image capturing and analysis, effectiveness and accuracy of analysis.

Description

Portable image spectrometer

The invention relates to an image spectrometer, in particular to a portable image spectrometer for spectral analysis.

A variety of different substances, based on their unique atomic structure or molecular arrangement, will exhibit different absorbance abilities for different wavelengths, so that each substance has its own unique absorption spectrum, while the same substance, under different spectral bands , also has different reflectivity or emissibility, therefore, if it can determine the reflection or radiation of different objects in a specific spectral range (such as Gamma, X-ray, ultraviolet light, visible light, infrared light, microwave) Intensity can be used to speculate on the performance of each object in the spectral range, and is widely used in geology, hydrology, geography, agriculture, forestry, fisheries, animals, oceans, etc.

At present, the instruments for extracting spectral images mainly include scanning image spectrometers and revolving image spectrometers. Among them, the scanning image spectrometer uses the scanning method to capture the spectrum of each point on the scanning line, and then obtains the spectrum of each point in the image map according to the intensity in the spectrum image. However, the above-mentioned scanning image spectrometer may have a high optical path due to the complicated image path of the scanning, the cost is high, the overall weight is heavy, the scanning time is too long, and it is difficult to obtain instant information, which is easy to cause analysis failure due to the movement of the object to be tested. Missing.

Referring to FIG. 1 , the rotary image spectrometer 1 mainly includes a camera 11 and a filter wheel 13 configured with a plurality of filters 12 . The filters 12 respectively pass light of a characteristic band. Thereby, it is only necessary to rotate the filter wheel 13, The camera 11 can be used to sequentially capture images of a single band.

Although the above-mentioned rotary image spectrometer 1 has a short imaging time, it still cannot be satisfied quickly and in terms of working time because of the rotation of the filter wheel 13 and the single-band image capturing one by one. Time requirement, and during the rotation of the filter wheel 13, the object to be tested is usually required, or the rotary image spectrometer 1 remains stationary, if one side moves (if the object to be tested is an insect, the previous second Still in the shooting range, the next second is flying out of the shooting range), or the object to be measured changes (such as when the mimosa can open the surface, but can not capture the surface), it is easy to cause each band of image The images are inconsistent and affect the validity and correctness of the analysis.

Accordingly, it is an object of the present invention to provide a portable image spectrometer capable of improving image acquisition, analysis speed, and analysis effectiveness and correctness.

Therefore, the portable image spectrometer of the present invention comprises at least a two-band filter, at least two image capturing modules, and an image processing unit. The band filters respectively pass light of a characteristic band. The image capturing modules respectively extract a band image from the same object according to the light of the feature band. The image processing unit is configured to overlap the band image and perform spectral segment analysis to obtain a spectral segment characteristic of the object.

The utility model has the advantages of providing at least two filters and at least two image capturing modules, simultaneously providing different wavelengths of light, and simultaneously capturing different band images, thereby improving image capturing and analysis speed, and analyzing time. Validity and correctness.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Referring to FIG. 2, FIG. 3, and FIG. 4, a first preferred embodiment of the portable image spectrometer of the present invention comprises an outer body 3, a three image capturing module 4, a digital band filter 5, and a plurality of connecting members 61. And an image processing unit 7.

The outer casing 3 has a panel 31 formed on a front surface, and three through holes 32 formed in the panel 31. The panel 31 is a magnetically permeable material in the preferred embodiment.

The image capturing modules 4 are mounted in the outer casing 3 and are respectively exposed in the through holes 32. In the preferred embodiment, the image capturing module 4 captures a band image by a photosensitive element (not shown).

The band pass filters 5 are respectively provided for a characteristic band and do not repeat light penetration. The foregoing characteristic band is matched with the number of the equal-band filters 5, and includes a first characteristic band, a second characteristic band, a third characteristic band, and the like. It should be noted that the range of the aforementioned characteristic bands must match the detectable range of the photosensitive elements in the image capturing module 4.

In the preferred embodiment, the connecting members 61 are respectively a magnetic component disposed on one side of the band filter 5 and adjacent to an edge, so that the band filters 5 are respectively adsorbed by the connecting members 61. The panel 31 is opposite to the image capturing module 4.

The image processing unit 7 has an input module 71 electrically connected to the image capturing module 4, a correction module 72 for correcting and overlapping the band image, An analysis module 73 for performing spectral segment analysis and an output module 74 for outputting spectral segment characteristics.

In use, only the images of the object 8 are simultaneously taken by the image capturing module 4, and the light of the first characteristic band, the second characteristic band, and the third characteristic band can be allowed only in the band filter 5. In the case of transparency, according to the photoelectric effect, the number of photons and photons are respectively converted into the number of electrons and electrons, and at the same time, three band images A and B corresponding to the first characteristic band, the second characteristic band, and the third characteristic band are respectively obtained. C (Figure 5).

Referring to FIG. 3, FIG. 4, and FIG. 5 and FIG. 6, the image capturing module 4 transmits the band images A, B, and C to the input module 71 of the image processing unit 7 to take a picture. The object 8 obtains the three-band images A, B, and C as an example. Since the image images A, B, and C are taken by the image capturing module 4 at three different positions, the objects 8 in the band images will be As shown in FIG. 5, there is a case where the correction module 72 corrects and overlaps the spectral images A, B, and C, and the objects 8 of the band images A, B, and C are superposed to form an object 8 . A spectral image D as shown in FIG. Finally, the analysis module 73 performs spectral segment analysis on the superposed spectral image D to obtain the spectral segment characteristics of the object 8 and displays it on the output module 74.

It is worth mentioning that since the filters 5 are adsorbed on the panel 31 by the connecting members 61, the mounting is convenient and easy to disassemble, so that the user can select according to the detection requirements of the aforementioned characteristic bands. Replace the different filters 5.

Referring to FIG. 7, a second preferred embodiment of the present invention is substantially the same as the first preferred embodiment, and includes a housing 3 and a three-image capturing module 4. The digital band filter 5, the plurality of links 62, and the image processing unit 7 are different in that the connecting members 62 are respectively disposed on the panel 31 of the outer casing 3 and are generally U-shaped in the preferred embodiment. One track seat.

The band filters 5 are respectively inserted into the connecting members 62 and opposed to the image capturing module 4.

Thereby, the filters 5 can also be quickly mounted, disassembled and replaced by sliding and drawing, and the user can selectively replace the different filters 5 according to the detection requirements of the aforementioned characteristic bands.

Referring to FIG. 7, a third preferred embodiment of the present invention is substantially the same as the second preferred embodiment. The difference is that the portable image spectrometer of the present invention further includes a three-seat 9.

The outer casing 3 further has three slots 33 formed on a top surface and two side surfaces and opposite to the through holes 32, respectively.

The sley 9 is used to mount the image taking module 4, and is detachably embedded in the slot 33 of the casing 3. Therefore, in addition to replacing the filter 5, the present invention can also selectively replace the image capturing module 4 with a special band range, so that the present invention can be applied to a wider range of detection range.

According to the above description, the portable image spectrometer of the present invention has the following advantages and effects:

1. Since the image capturing module 4 captures images, it is a mature and popular technology, so that it is small in size, easy to obtain, and low in equipment cost, and the image capturing module 4 can detect visible light to near infrared. The band, in turn, can improve the scope of application in analytical testing.

2. The present invention is to use at least two filters 5 and at least two image capturing modules 4 to simultaneously provide different wavelengths of light and simultaneously capture different band images, that is, the present invention can be instantaneously Aiming at different wavelengths of light, multi-band images can be taken at the same time, which not only improves the speed of image acquisition and analysis, but also minimizes the impact of moving objects 8, thereby improving the validity and correctness of the analysis. .

3. The invention can replace the band filter 5 arbitrarily according to the required characteristic band, or replace the image capturing module 4 with a special band range, so that the invention is applicable to a wider range of detection range.

4. The present invention can simplify the assembly and reduce the overall weight without affecting the function of use, so that the present invention can be easily carried out or made into a head-mounted image spectrometer.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

3‧‧‧ Shell

31‧‧‧ panel

32‧‧‧through holes

33‧‧‧Slots

4‧‧‧Image capture module

5‧‧‧Band filter

61‧‧‧Links

62‧‧‧Links

7‧‧‧Image Processing Unit

71‧‧‧Input module

72‧‧‧ calibration module

73‧‧‧Analysis module

74‧‧‧Output module

8‧‧‧ objects

9‧‧‧匣座

A‧‧‧ band image

B‧‧‧Band Image

C‧‧‧ band image

D‧‧‧spectral imagery

1 is a schematic view showing a general scanning image spectrometer; FIG. 2 is an exploded perspective view showing a first preferred embodiment of a portable image spectrometer of the present invention; FIG. 3 is a first preferred embodiment of the first preferred embodiment. FIG. 4 is a block diagram of the first preferred embodiment; FIG. 5 is a schematic diagram showing a band image captured by the three image capturing modules in the first preferred embodiment; 6 is a schematic view showing the overlapping of the same-wavelength image in the first preferred embodiment; FIG. 7 is a perspective view showing a second preferred embodiment of a portable image spectrometer of the present invention; and FIG. 8 is a A perspective view of a third preferred embodiment of a portable image spectrometer of the present invention.

3‧‧‧ Shell

31‧‧‧ panel

32‧‧‧through holes

4‧‧‧Image capture module

5‧‧‧Band filter

61‧‧‧Links

7‧‧‧Image Processing Unit

8‧‧‧ objects

Claims (7)

A portable image spectrometer comprising: at least two-band filters for respectively transmitting light of a characteristic band; and at least two image capturing modules respectively capturing a band image from the same object according to the light of the characteristic band; An image processing unit for superimposing the image of the band and performing spectral segment analysis to obtain spectral segment characteristics of the object; a housing for mounting the image capturing module, and having a panel formed on the panel and exposing the panel And at least two through holes of the image capturing module; and a plurality of connecting members for connecting the band filters and the panel of the outer casing to position the band filters on the panel. According to the portable image spectrometer of claim 1, wherein the band filter has a plurality of slices for respectively penetrating light having a non-repetitive band. According to the portable image spectrometer of claim 1, wherein the image processing unit has a correction module for correcting and overlapping the band image, so that the same object in the segment image is completely coincide. The portable image spectrometer according to claim 3, wherein the image processing unit further has an input module electrically connected to the image capturing module and used for inputting a band image, and is used for synthesizing the band image. And an analysis module for spectral segment analysis, and an output module for outputting spectral segment characteristics. According to the portable image spectrometer described in claim 1 of the patent application scope, wherein The connecting members are respectively a magnetic component, and the panel of the outer casing is a magnetically permeable material, and the connecting members are respectively disposed on one side of the band filter and adjacent to an edge, so that the band filters are respectively The links are attached to the panel and opposite to the image taking module. According to the portable image spectrometer of claim 1, wherein the connecting members are respectively a U-shaped rail seat disposed on the outer casing panel, and the band filters are respectively inserted in the Inside the link. The portable image spectrometer according to claim 1 further includes at least two squats for respectively loading the image taking module and detachably disposed on the outer casing.