CN217236980U - Multispectral system structure based on optical fiber type - Google Patents
Multispectral system structure based on optical fiber type Download PDFInfo
- Publication number
- CN217236980U CN217236980U CN202220721507.6U CN202220721507U CN217236980U CN 217236980 U CN217236980 U CN 217236980U CN 202220721507 U CN202220721507 U CN 202220721507U CN 217236980 U CN217236980 U CN 217236980U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- area array
- imaging spectrometer
- transmission
- fiber bundles
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a multispectral system structure based on optical fiber formula, relates to multispectral system technical field, solves the problem that the prior art signal acquisition is unstable, the processing efficiency is low, including area array light source, optic fibre module, transmission-type formation of image spectrum appearance, area array detector; the optical fiber comprises a plurality of independent optical fiber bundles, the plurality of optical fiber bundles are fixed together side by side, and the optical fiber end faces of all the optical fiber bundles are positioned on the same focal plane; the detection end of the optical fiber module is connected to the area array light source, the output end of the optical fiber module is aligned with the entrance slit of the transmission type imaging spectrometer, and the output end of the transmission type imaging spectrometer is opposite to the area array detector; the utility model has the advantages of stable collection and high treatment efficiency.
Description
Technical Field
The utility model relates to a multispectral system technical field, more specifically relate to multispectral system structure technical field based on optic fibre formula.
Background
After the development of remote sensing technology goes through the stages of full-color black-and-white, color RGB and multispectral scanning imaging, optical remote sensing is promoted to enter a brand-new stage, namely a hyperspectral remote sensing stage by the imaging spectrum technology appearing in the early 80 s of the last century. The hyperspectral technology refers to remote sensing science and technology with hyperspectral resolution, and an imaging spectrometer used by the imaging spectroscopy technology can acquire a plurality of very narrow and spectrally continuous image data in ultraviolet, visible light, near infrared and short wave infrared regions of an electromagnetic spectrum. The imaging spectrometer provides tens to hundreds of narrow-band spectral information for each pixel, thereby forming a complete and continuous spectral curve. Imaging spectrometers record various features observed over a field of view as a complete spectral curve, and analysis of the recorded data and research is a multidisciplinary task.
The hyperspectral imaging is a comprehensive technology integrating a detector technology, a precise optical machine, weak signal detection, a computer technology and an information processing technology. Is a combined imaging technique and spectrum techniqueThe combined multidimensional information acquisition technology simultaneously detects two-dimensional geometric space and one-dimensional spectral information of a target, and acquires continuous and narrow-band image data with high spectral resolution. Spectral resolution of the hyperspectral image data is up to 10 -2 The resolution of the spectrum is nanometer in the range of visible to short wave infrared band, the number of the spectrum bands is dozens or even hundreds, the spectrum bands are usually continuous, and each pixel of the image data can extract a complete high resolution spectrum curve.
The measured object passes through the lens and is captured by the spectrum camera to obtain a one-dimensional image and corresponding spectrum information, when the sample is driven by the electric control mobile platform or the conveyor belt to continuously run, the continuous one-dimensional image and the real-time spectrum information of the sample target object can be obtained, all data are recorded by computer software in the process, and finally, a three-dimensional data cube containing the image information and the spectrum information is obtained. Through the analysis of the data, the quality information of the target sample can be detected. The conventional technologies, such as push-scan imaging spectrometers, usually require scanning by moving a scanning mechanism, and the scanning process of the conventional technologies is limited and the data size is very large, so that the signal acquisition is unstable and the processing efficiency is low, or the channels of the conventional technologies, such as liquid crystal tunable filter cameras, are small, and the image processing workload is large, so that the efficiency is low and the cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the problems of unstable signal acquisition and low processing efficiency in the prior art are solved. In order to solve the technical problem, the utility model provides a multispectral system structure based on optic fibre formula.
The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:
a multispectral system structure based on optical fiber type comprises an area array light source, an optical fiber module, a transmission type imaging spectrometer and an area array detector;
the optical fiber module comprises a plurality of independent optical fiber bundles, the plurality of optical fiber bundles are fixed together side by side, and the optical fiber end faces of all the optical fiber bundles are positioned on the same focal plane;
the detection end of the optical fiber module is connected to the area array light source, the output end of the optical fiber module is aligned with the entrance slit of the transmission type imaging spectrometer, and the output end of the transmission type imaging spectrometer is over against the area array detector.
Preferably, the optical fiber comprises 40 independent optical fiber bundles, the length of the optical fiber bundle is 0.5 meter, and the core diameter is 105 micrometers; the entrance slit of the transmission type imaging spectrometer has the width of 18 microns and the length of 14 millimeters.
Preferably, the transmission type imaging spectrometer comprises an entrance slit, a first collimating lens, a transmission type grating and a second collimating lens which are arranged in sequence.
Preferably, the area array light source comprises a box body, a heat radiation fan and 16 halogen bulbs; the top of the box body is a light homogenizing glass plate;
the halogen bulbs are arranged at the bottom of the box body and are arranged in four rows and four columns; 2 cooling fans are respectively installed on the front side and the rear side of the box body.
Preferably, the light homogenizing glass plate is single-side ground glass, the area of the single-side ground glass is 200 square millimeters, the thickness of the single-side ground glass plate is 5 millimeters, and the ground surface of the single-side ground glass plate faces the interior of the box body.
The utility model has the advantages as follows:
the utility model adopts the technical proposal that the optical fiber is utilized to introduce the sample spectrum signal far away from the spectrum test instrument into the spectrum detection instrument so as to reflect the parameters of the sample to be tested, such as attribute, shape, position, etc., and the optical signal introduced by the optical fiber can also isolate the inside of the instrument from the external environment, reduce interference, enhance the resistance to severe environment, such as humid climate, strong electric field interference, corrosive gas, etc., further ensure the long-term reliable temperature operation work of the spectrometer and prolong the service life of the spectrometer; the optical fiber spectrometer has compact and small structure and high cost performance; the optical signal of the target to be measured is converted and then is displayed on the receiving surface of the area array receiver, the optical signal is converted into an electronic signal, the subsequent analog-digital conversion and A/D amplification are facilitated, the signal is output, and finally the signal is controlled and collected by an external software system, so that various spectral signal measurement and analysis are completed, the signal processing burden is reduced, the processing mode is flexible, and the processing efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic diagram showing an arrangement structure of the transmission type imaging spectrometer and the area array detector of embodiment 1;
FIG. 3 is a schematic top view showing the structure of an area array light source according to example 1;
FIG. 4 is a schematic view showing the arrangement of the fixed ends of the sample stage in example 1;
reference numerals are as follows: 200-transmission type imaging spectrometer, 201-entrance slit, 202-first collimating lens, 203-transmission type grating, 204-second collimating lens, 205-area array detector, 301-cooling fan and 302-halogen bulb.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
As shown in fig. 1 to 3, the present embodiment provides a structure of a multispectral system based on an optical fiber, including an area array light source, an optical fiber module, a transmission-type imaging spectrometer 200, and an area array detector 205; the area array light source is used for ensuring that the optical fiber bundle is in a uniform illumination environment during working, reducing external interference and ensuring sufficient illumination by increasing the number of bulbs or strategy.
The optical fiber module comprises a plurality of independent optical fiber bundles, the optical fiber bundles are fixed together side by side, and the optical fiber end faces of all the optical fiber bundles are positioned on the same focal plane; in particular, the fixed joints of the optical fiber heads are standard BNC joints, so that the optical fiber heads are convenient to fix, lock, replace and the like.
The detection end of the optical fiber module is connected to the area array light source, the output end of the optical fiber module aligns with the entrance slit 201 of the transmission type imaging spectrometer 200, and the output end of the transmission type imaging spectrometer 200 faces the area array detector 205.
As a preferable scheme of this embodiment, the optical fiber includes 40 independent optical fiber bundles, the length of the optical fiber bundle is 0.5 meter, and the core diameter is 105 micrometers; the entrance slit 201 of the transmission imaging spectrometer 200 has a width of 18 μm and a length of 14 mm. In this embodiment, the core diameter of the optical fiber bundle is 105 micrometers, the width of the packaged single optical fiber bundle is 350 micrometers, and 40 optical fiber bundles packaged side by side have a width of 14000 micrometers, that is, 14 millimeters, and the 40 optical fiber bundles can be just packaged into a row aligned with the entrance slit 201 of the transmission-type imaging spectrometer 200.
Further, the transmission type imaging spectrometer 200 includes an entrance slit 201, a first collimating lens 202, a transmission type grating 203 and a second collimating lens 204, which are arranged in sequence.
Also preferably, the area array light source comprises a box body, a heat radiation fan 301 and 16 halogen bulbs 302; the top of the box body is a light homogenizing glass plate; the halogen bulbs 302 are arranged at the bottom of the box body and are arranged in four rows and four columns; 2 heat radiation fans 301 are respectively installed on the front side and the rear side of the box body. Preferably, the light homogenizing glass plate is made of single-side ground glass, the area of the single-side ground glass is 200 square millimeters, the thickness of the single-side ground glass is 5 millimeters, and the ground surface of the single-side ground glass faces the interior of the box body. The area array illumination formed by the light source is uniform to a certain extent, but each optical fiber bundle has a certain view field angle and an incident angle, so that the light is subjected to diffuse scattering treatment once again through the optical homogenization glass, the illumination uniformity incident to the optical fiber probe is better, and the supersaturation is avoided from influencing the judgment of the test structure.
In order to guarantee the effect of homogenizing glass, the homogenizing glass is generally calibrated, when the corresponding transmittance of the homogenizing glass is calibrated through a sample table, the transmission spectrum information of a group of homogenizing glass is shot firstly, then a corresponding sample is placed on the sample table, the transmitted spectrum curves of the sample are different, and therefore when data is processed, the homogenization glass is used for calibrating and calibrating, and the problem of consistency of the system can be better reflected. 41 ports on the sample table are used for fixing the optical fiber, so that the optical fiber directly introduces transmission spectrum information, the distribution of 41 positions fully considers the practical application requirement, and the test effects of different wave bands under high-density distribution and uniform spatial distribution are achieved. The central 15/16/17, 20/21/22, 25/26/27 three groups of 9 fixed ends are distributed in a three-row three-column arrangement in a 3cm by 3cm area, the remaining 9 fixed ends around the center are distributed in a 10cm by 10cm area, and the effective homogenization area of the area array light source is 15cm by 15cm, so that the distribution can ensure that each fiber bundle is irradiated.
The 200 square millimeter size used in this embodiment also better disperses the heat in the enclosed space. On the other hand, the heat dissipation fan 301 can further ensure that the environment where the light source is located is at a relatively stable temperature, which can increase the lifetime of the light source, and also protect the device and the sample.
In summary, a spectral signal (reflection spectrum/transmission spectrum) to be measured is transmitted by an optical fiber module, and is projected onto a first collimating lens 202 after passing through a slit of a transmission-type imaging spectrometer 200, where the size of the slit affects the resolution of the spectrum, the first collimating lens 202 converts a divergent optical signal into quasi-parallel light, the quasi-parallel light enters a transmission-type grating 203, the transmission-type grating 203 is subjected to dispersion and then forms parallel light through a second collimating lens 204 for imaging, the spectrum is displayed on a receiving surface of an area array detector 205, the optical signal is converted into an electrical signal, and then is output after being subjected to analog-digital conversion, a/D amplification and other operations in subsequent steps, and finally, the system controls and acquires the signal, thereby completing measurement and analysis of various spectral signals.
Example 2
In this embodiment, based on the technical solution of embodiment 1, the method for detecting the structure of the optical fiber-based multispectral system in embodiment 1 is specifically as follows:
the optical fiber module is irradiated by the area array light source to ensure that the optical fiber bundle is in a uniform illumination environment when in work, a sample spectrum signal to be detected is input to the optical fiber module, and incident light is output through a plurality of optical fiber bundles of the optical fiber module and comprises a plurality of light spot signals which are arranged in a line;
after the incident light enters an incident slit of the transmission type imaging spectrometer, the transmission type imaging spectrometer outputs monochromatic light with a plurality of wavelength distributions;
the monochromatic light is mapped to the surface array detector, and a detection result is obtained through the surface array detector.
As a preferable solution of this embodiment, the incident light includes 40 spot signals arranged in a row, and this implementation is based on an arrangement structure of optical fiber bundles, where multiple optical fiber bundles are fixed together side by side, and fiber end faces of all the optical fiber bundles are in the same focal plane.
Preferably, the method for outputting monochromatic light with a plurality of wavelength distributions by the transmission-type imaging spectrometer comprises the following steps:
the incident light is firstly adjusted into parallel light under the action of the first collimating lens, then the parallel light is dispersed by the transmission grating to form monochromatic light with different wavelength distributions, and then the monochromatic light is collimated and adjusted by the second collimating lens and the collimated and adjusted monochromatic light is output.
Further, the method for acquiring the detection result by the area array detector comprises the following steps:
every adjacent multiple pixel points in the transverse direction of the area array detector represent information collected by one optical fiber bundle, the transverse direction of the area array detector comprises 1936 pixel points, and the pixel points corresponding to each optical fiber bundle are positioned and marked by line segments with different colors;
for example, the pixel points occupied by the 10 th and 15 th channels in the spatial dimension are: 600 vs. 630Pixels,800 vs. 830Pixels, and so on.
The longitudinal direction of the area array detector comprises 1456 pixel points which respectively represent mapping points with different wavelengths.
For example, the spectral range over which an imaging spectrometer can disperse is: 380nm-1100nm, that is to say, the pixel points of the area array detector with different longitudinal axis directions are as follows: 1. 2, 3 … … 1454, 1455, 1456 are the mapping points of different wavelengths, respectively. Theoretically, the distribution of the 40 optical fiber bundles in the direction of their respective longitudinal axes is independent and does not interfere with each other. In order to ensure the spectral consistency of 40 optical fiber axes, strict design and calibration are carried out during integration, basically, the deviation is controlled to be at most 1 pixel point, while the spectral resolution of the transmission type imaging spectrometer used by the system of the embodiment is 2nm, 2nm is almost the spatial distribution of 4 (pixels), and compared with the spatial distribution, the deviation of 1 pixel is not enough to influence the precision. Therefore, the spectral calibration data of 40 fiber bundles are considered to be consistent to be applied, and the acquisition efficiency of the system can be improved.
Claims (5)
1. The multispectral system structure based on optical fiber type is characterized by comprising a surface array light source, an optical fiber module, a transmission type imaging spectrometer (200) and a surface array detector (205);
the optical fiber module comprises a plurality of independent optical fiber bundles, the plurality of optical fiber bundles are fixed together side by side, and the optical fiber end faces of all the optical fiber bundles are positioned on the same focal plane;
the detection end of the optical fiber module is connected to the area array light source, the output end of the optical fiber module is aligned with the entrance slit (201) of the transmission type imaging spectrometer (200), and the output end of the transmission type imaging spectrometer (200) is over against the area array detector (205).
2. The fiber-based multispectral system structure of claim 1, wherein the optical fibers comprise 40 independent fiber bundles, the fiber bundles have a length of 0.5 m and a core diameter of 105 μm; the entrance slit (201) of the transmission imaging spectrometer (200) has a width of 18 microns and a length of 14 mm.
3. The fiber-based multispectral system architecture according to claim 1, wherein the transmission imaging spectrometer (200) comprises an entrance slit (201), a first collimating lens (202), a transmission grating (203), and a second collimating lens (204) arranged in sequence.
4. The fiber-based multispectral system architecture of claim 1,
the area array light source comprises a box body, a heat radiation fan (301) and 16 halogen bulbs (302); the top of the box body is a light-homogenizing glass plate;
the halogen bulbs (302) are arranged at the bottom of the box body and are arranged in four rows and four columns; 2 cooling fans (301) are respectively installed on the front side and the rear side of the box body.
5. The fiber-based multispectral system structure of claim 4, wherein the glazing glass sheet is a single-sided frosted glass sheet having an area of 200 mm and a thickness of 5 mm, and the frosted surface of the glazing glass sheet faces the interior of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220721507.6U CN217236980U (en) | 2022-03-30 | 2022-03-30 | Multispectral system structure based on optical fiber type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220721507.6U CN217236980U (en) | 2022-03-30 | 2022-03-30 | Multispectral system structure based on optical fiber type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217236980U true CN217236980U (en) | 2022-08-19 |
Family
ID=82843706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220721507.6U Active CN217236980U (en) | 2022-03-30 | 2022-03-30 | Multispectral system structure based on optical fiber type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217236980U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114636474A (en) * | 2022-03-30 | 2022-06-17 | 江苏双利合谱科技有限公司 | Optical fiber based multi-spectral system structure and detection method thereof |
-
2022
- 2022-03-30 CN CN202220721507.6U patent/CN217236980U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114636474A (en) * | 2022-03-30 | 2022-06-17 | 江苏双利合谱科技有限公司 | Optical fiber based multi-spectral system structure and detection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8553224B2 (en) | Fiber bundle for high efficiency, spatially resolved coupling | |
| US6630999B2 (en) | Color measuring sensor assembly for spectrometer devices | |
| US6057925A (en) | Compact spectrometer device | |
| US6690466B2 (en) | Spectral imaging system | |
| US8310669B2 (en) | Spectroscopic imaging method and system for exploring the surface of a sample | |
| US7626696B2 (en) | Method and apparatus for reconfigurable field of view in a FAST-based imaging system | |
| US20070165210A1 (en) | High-density channels detecting device | |
| WO2013033982A1 (en) | Optical fibre bundle spectrometer | |
| US20140055784A1 (en) | Camera system for capturing two-dimensional spatial information and hyper-spectral information | |
| CN101017083A (en) | High-density multi-channel testing device | |
| CN114858279A (en) | Coaxial self-aiming spectral measurement system and measurement method | |
| US6208413B1 (en) | Hadamard spectrometer | |
| CN217236980U (en) | Multispectral system structure based on optical fiber type | |
| US7869034B2 (en) | Multi-angle and multi-channel inspecting device | |
| JP2010151801A (en) | Raman imaging apparatus | |
| US20070188747A1 (en) | System and method for image reconstruction in a fiber array spectral translator system | |
| JP5917572B2 (en) | Spectroscopic measurement apparatus and image partial extraction apparatus | |
| US20050062964A1 (en) | Real-time goniospectrophotometer | |
| CN114636474A (en) | Optical fiber based multi-spectral system structure and detection method thereof | |
| WO2022116412A1 (en) | Dot matrix spectrum measurement apparatus and method, and area array chrominance measurement apparatus and method | |
| Kung et al. | Development of an ultraspectral imaging system by using a concave monochromator | |
| US20230003660A1 (en) | Method for optical monitoring and/or determination of properties of sample | |
| JP6260157B2 (en) | Spectrometer | |
| US20230204515A1 (en) | Multi-track raman well plate reader | |
| WO2009020450A1 (en) | Method and apparatus for reconfigurable field of view in a fast-based imaging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |