Local imaging spectrum system based on white board pre-calibration

Abstract

The utility model discloses a white board pre-calibration-based local imaging spectrum system, which comprises a shooting lens, a beam splitter, a visible light camera, a light beam modulation assembly, a focusing lens group and a single-point spectrometer, and is characterized in that the beam splitter is mounted on one side of the shooting lens, and the light beam modulation assembly is mounted on one side, far away from the shooting lens, of the beam splitter; the visible light camera is installed above the beam splitter, the focusing lens group is installed above the beam splitter, the single-point spectrometer is installed above the focusing lens group, the visible light camera and the single-point spectrometer are connected with the main control board and used for data transmission, and the main control board is provided with a control module for controlling the light beam modulation assembly to turn over by a certain angle. According to the invention, local imaging can be carried out on a specified target in any scene, the reflectivity of the measured object is obtained according to the white board with the known reflectivity, the system is simpler in light path and lower in cost, and equipment can be made smaller and more portable.

Description

Technical Field

[0001] This application relates to the field of local imaging spectroscopy technology, and more specifically, to a local imaging spectroscopy system based on whiteboard pre-calibration. Background Technology

[0002] A spectrometer is a scientific instrument used to measure the intensity of light as a function of its frequency or wavelength. It separates light of different wavelengths and records their relative intensities, thus producing a graph called a spectrum. The following are the main functions and advantages of a spectrometer:

[0003] effect:

[0004] Chemical composition analysis: By analyzing the absorption, emission, or scattering spectra of a substance, its composition can be determined. For example, in astronomy, it is used to identify the elemental composition of stars.

[0005] Environmental monitoring: It can be used to detect pollutants in air and water, such as greenhouse gas concentrations or other harmful substances.

[0006] Materials research: In materials science research, spectrometers can provide information about the structure of materials, including crystal structure, electronic states, etc.

[0007] Medical diagnostics: In the medical field, spectral technology is used for disease diagnosis, such as blood analysis or tissue imaging.

[0008] Quality control: Spectrometers are used in industrial production to ensure consistent product quality and that products meet specifications.

[0009] advantage:

[0010] High resolution: Modern spectrometers can distinguish very close wavelengths, making it possible to perform fine analysis of complex mixtures.

[0011] Non-destructive testing: Many types of spectroscopic analysis do not require destroying the sample, which is especially important in the identification of cultural relics or the study of precious samples.

[0012] Fast response: Some spectrometers can acquire data in a short time, making them suitable for real-time monitoring applications.

[0013] Multifunctionality: The spectrometer is suitable for samples in various physical forms (solid, liquid, gas) and can process light in different wavelengths from ultraviolet to infrared.

[0014] High degree of automation: By combining computer technology, spectrometers can achieve automated data acquisition and processing, improving work efficiency and reducing human error.

[0015] Quantitative and qualitative analysis: It can not only determine which elements or compounds are present (qualitative), but also accurately measure their quantity (quantitative).

[0016] Remote operation capability: Some advanced spectrometers support remote control and data transmission, facilitating measurements in dangerous or hard-to-reach locations.

[0017] In summary, spectrometers are indispensable tools in scientific research and technological applications, providing information that is crucial for understanding natural phenomena and solving practical problems. To efficiently and accurately acquire hyperspectral data from specific regions, local imaging has emerged as a necessary technological approach. Local imaging can image target areas and has wide applications across various fields. Therefore, a portable, efficient, accurate, and low-cost local imaging spectroscopic system is highly anticipated by the market. Utility Model Content

[0018] To address the problems in related technologies, this application proposes a local imaging spectral system based on whiteboard pre-calibration, which is a low-cost, smaller, and more portable local imaging spectral system.

[0019] Therefore, the specific technical solution adopted in this application is as follows:

[0020] A local imaging spectral system based on whiteboard pre-calibration includes: an imaging lens, a beam splitter, a visible light camera, a beam modulation assembly, a focusing lens group, and a single-point spectrometer. The beam splitter is mounted on one side of the imaging lens, the beam modulation assembly is mounted on the side of the beam splitter away from the imaging lens, the visible light camera is mounted above the beam splitter, the focusing lens group is mounted above the beam modulation assembly, and the single-point spectrometer is mounted above the focusing lens group. The visible light camera and the single-point spectrometer are connected to a main control board for data transmission. The main control board is equipped with a control module that controls the beam modulation assembly to flip at a certain angle. When using this local imaging spectral system based on whiteboard pre-calibration for imaging, a whiteboard calibration system is used before imaging.

[0021] The spectral system of this application collects a mixed signal that includes the reflectance of the object, rather than the reflectance signal of the object itself. In this environment, a signal data is first obtained using a whiteboard with known reflectance. This signal is then divided with the reflectance of the unknown object in the same environment to eliminate other interference factors. Based on the whiteboard with known reflectance, the reflectance of the object under test is obtained. Therefore, the optical path of this system is simpler, the cost is lower, and the equipment can be made smaller and more portable.

[0022] Furthermore, the beam splitter splits the incident light into beams of different directions or angles.

[0023] Furthermore, the beam modulation component is a device that performs partial reversal of the beam to achieve the desired effect. It modulates the beam after it has been split. The beam modulation component adopts a DMD or a liquid crystal spatial light modulator.

[0024] Furthermore, a shutter assembly is installed between the shooting lens and the beam splitter, which controls the light flow through the shooting lens.

[0025] Furthermore, visible light cameras include monochrome cameras, color cameras, or standalone CMOS chips.

[0026] Furthermore, the imaging angle range of the shooting lens is adjustable, and lenses with different wavelength ranges can also be selected as needed.

[0027] Furthermore, the shutter assembly includes an electronic shutter or a physical mechanical shutter.

[0028] The beneficial effects of this application are as follows: This application can perform local imaging of a specified target in any scene, obtain the reflectivity of the object under test based on a whiteboard with known reflectivity, and the optical path of this system is simpler, the cost is lower, and the equipment can be made smaller and more portable. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a local imaging spectral system based on whiteboard pre-calibration according to an embodiment of this application.

[0031] In the picture:

[0032] 1. Shooting lens; 2. Shutter assembly; 3. Beam splitter; 4. Visible light camera; 5. Beam modulation assembly; 6. Focusing lens group; 7. Single-point spectrometer; 8. Main control board; 9. Computer. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] like Figure 1As shown, a local imaging spectral system based on whiteboard pre-calibration includes: a shooting lens 1, a beam splitter 3, a visible light camera 4, a beam modulation assembly 5, a focusing lens group 6, and a single-point spectrometer 7. The beam splitter 3 is mounted on one side of the shooting lens 1, and the imaging angle range of the shooting lens 1 is adjustable. The beam splitter 3 splits the incident light into beams of different directions or angles. A shutter assembly 2 is installed between the shooting lens 1 and the beam splitter 3. The shutter assembly 2 controls the light transmission and deactivation of the shooting lens 1. The shutter assembly 2 includes an electronic shutter or a physical mechanical shutter. The beam modulation assembly 5 is mounted on the side of the beam splitter 3 away from the shooting lens 1. The beam modulation assembly 5 modulates the light beam... The target device is achieved by performing local flipping. The beam after beam splitting is modulated. The beam modulation component 5 adopts a DMD or liquid crystal spatial light modulator. The visible light camera 4 is installed above the beam splitter 3. The visible light camera 4 can be a black and white camera or a color camera. The focusing lens group 6 is installed above the beam modulation component 5. The single-point spectrometer 7 is installed above the focusing lens group 6. The visible light camera 4 and the single-point spectrometer 7 are connected to the main control board 8 for data transmission. The main control board 8 is equipped with a control module that controls the beam modulation component 5 to flip by a certain angle. When using this local imaging spectral system based on whiteboard pre-calibration for imaging, the whiteboard calibration system is used before imaging.

[0035] The working principle of this local imaging spectral system based on whiteboard pre-calibration is as follows: The signal acquired by this spectral system is not the reflectance signal of the object, but a mixed signal including the environment. In this environment, a signal data is first acquired using a whiteboard with known reflectance. This signal is then divided with the reflectance of the unknown object in the same environment to eliminate other interference factors. Based on the whiteboard with known reflectance, the reflectance of the object under test is obtained. After the whiteboard is calibrated, the light passing through the imaging lens 1 passes through the beam splitter 3. The beam splitter 3 splits the incident light into two beams with different directions or angles. One beam reaches the visible light camera 4, while the other beam passes through the DMD5 to the focusing lens group 6 and continues to be transmitted to the single-point spectrometer 7. The light inlet of the single-point spectrometer 7 is installed at the focal point of the focusing lens group 6, ensuring that the light is received while the light is transmitted into the optical fiber. In summary, this local imaging system provides more accurate imaging. By using whiteboard calibration, the system can be made smaller and more portable. The single-point spectrometer is also cheaper. Furthermore, the optimization difficulty of line detectors is lower than that of area detectors, and the use of CMOS chips in the visible light camera can also reduce costs.

[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A local imaging spectroscopy system based on whiteboard pre-calibration, characterized by, It comprises: A shooting lens (1), a beam splitter (3), a visible light camera (4), a light beam modulation assembly (5), a focusing lens group (6), and a single-point spectrometer (7). The beam splitter (3) is installed on one side of the shooting lens (1), the light beam modulation assembly (5) is installed on the side of the beam splitter (3) away from the shooting lens (1), the visible light camera (4) is installed above the beam splitter (3), the focusing lens group (6) is installed above the light beam modulation assembly (5), and the single-point spectrometer (7) is installed above the focusing lens group (6). The visible light camera (4) and the single-point spectrometer (7) are connected to a main control board (8) for data transmission. The main control board (8) is equipped with a control module for controlling the light beam modulation assembly (5) to flip by a certain angle. When using the local imaging spectral system based on whiteboard pre-calibration to image, the whiteboard calibration system is used before imaging.

2. The local imaging spectroscopy system based on whiteboard pre-calibration according to claim 1, wherein, The beam splitter (3) divides the incident light into light beams in different directions or angles.

3. The local imaging spectroscopy system based on whiteboard pre-calibration of claim 1, wherein, The light beam modulation assembly (5) is a device that flips the light beam locally to achieve the purpose. It modulates the light beam after splitting. The light beam modulation assembly (5) uses a DMD or a liquid crystal spatial light modulator.

4. The local imaging spectroscopy system based on whiteboard pre-calibration of claim 1, wherein, A shutter assembly (2) is installed between the shooting lens (1) and the beam splitter (3). The shutter assembly (2) controls the on-off of the light of the shooting lens (1).

5. The local imaging spectroscopy system based on whiteboard pre-calibration of claim 1, wherein, The visible light camera (4) includes a black and white camera, a color camera, or a separate CMOS chip.

6. The local imaging spectroscopy system based on whiteboard pre-calibration of claim 1, wherein, The imaging angle range of the shooting lens (1) can be adjusted.

7. The local imaging spectroscopy system based on whiteboard pre-calibration of claim 4, wherein, The shutter assembly (2) includes an electronic shutter or a physical mechanical shutter.

Images