An integrated handheld spectrometer

Abstract

The utility model discloses a kind of integrated handheld spectrometer, belong to spectral detection equipment technical field.The spectrometer includes spectrometer body, integrated optical integrated chip (including arrayed waveguide grating and adjustable optical filter) in silicon substrate, light source system, detection system and data processing system.Optical integrated chip adopts Z-shaped arrayed waveguide grating structure, and the resolution of 0.05nm level is reached with 3% of the light splitting efficiency promotion;Adjustable optical filter realizes center wavelength dynamic tuning (range 10-5nm, precision ±0.1 DEG C) by temperature modulation device (micro thermoelectric refrigerator+temperature sensor).Spectrometer body is ergonomics handle design, integrated operation button and liquid crystal display screen.Compared with prior art, the utility model significantly reduces volume, reduces cost by silicon-based integrated optical technology, while improving resolution and stability, suitable for alloy, ore, environment, consumer goods and other fields of on-site rapid detection.

Description

Technical Field

[0001] This utility model relates to the field of spectral detection equipment technology, and in particular to an integrated handheld spectrometer. Background Technology

[0002] A handheld spectrometer is a spectroscopic analysis instrument based on XRF (X-ray Fluorescence) spectral analysis technology. It mainly consists of an X-ray tube, detector, CPU, and memory. Due to its high efficiency, portability, and accuracy, it has important applications in fields such as alloys, ores, environment, and consumer products.

[0003] However, traditional spectrometers, due to their dispersed optical path systems and large size (usually occupying desktop space), cannot meet the portability requirements for on-site testing. While existing portable spectrometers attempt to reduce size, the use of discrete optical components (such as prisms and lenses) results in low integration, high cost (over 10,000 yuan per device), and limited resolution (generally greater than 1 nm). Furthermore, the optical path adjustment of traditional spectrometers relies on mechanical structures, making them susceptible to vibration interference and lacking stability. Therefore, we propose a new integrated handheld spectrometer. Utility Model Content

[0004] The main purpose of this invention is to propose an integrated handheld spectrometer that can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: an integrated handheld spectrometer, comprising:

[0006] The spectrometer body is equipped with a handle.

[0007] An optical integrated chip, integrated on a silicon substrate, includes an arrayed waveguide grating for beam splitting and an adjustable optical filter for filtering, wherein the silicon substrate is fixedly installed inside the spectrometer body;

[0008] The light source system, located at the front end of the spectrometer body, is used to emit a detection light source;

[0009] The detection system, located at the rear of the spectrometer, is used to receive optical signals and convert them into electrical signals;

[0010] An embedded microcontroller is fixedly installed inside the spectrometer body to process and analyze electrical signals to obtain spectral information.

[0011] As a further description of the above technical solution, the adjustable optical filter is connected to a temperature modulation device, which includes a miniature thermoelectric cooler and a temperature sensor.

[0012] As a further description of the above technical solution, the arrayed waveguide grating includes multiple channel waveguides, each of which is composed of alternating straight waveguide portions and curved waveguide portions.

[0013] As a further description of the above technical solution, from the top view of the optical integrated chip, the straight waveguide portion and the curved waveguide portion form a Z-shaped array waveguide grating.

[0014] As a further description of the above technical solution, the spectrometer body is equipped with operation buttons and an LCD screen, and the overall shape is ergonomically designed.

[0015] As a further description of the above technical solution, the adjustable optical filter, light source system, detection system, operation buttons and liquid crystal display screen are all electrically connected to the embedded single-chip microcomputer.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The highly integrated and portable optical system is integrated on a silicon substrate, replacing traditional discrete optical components (such as prisms and lenses), significantly reducing the size. The overall shape is ergonomically designed for easy handheld operation, meeting the needs of on-site testing. Furthermore, the spectrometer body is made of lightweight engineering plastics (such as ABS), further reducing the weight of the equipment and improving portability.

[0018] 2. High precision and stability Z-shaped array waveguide grating: The channel waveguide is formed by alternating straight and curved waveguides to create a Z-shaped broken line structure, which improves the spectral efficiency by 3% compared with the traditional straight waveguide and achieves a resolution of 0.05nm, which is better than the resolution of existing portable spectrometers that are generally greater than 1nm.

[0019] 3. The adjustable optical filter integrates a miniature thermoelectric cooler (TEC) and a temperature sensor, with a temperature adjustment accuracy of ±0.1℃ and a center wavelength tuning range of 10-5nm. It can dynamically adapt to the detection needs of multiple scenarios and avoid the problem of vibration interference in traditional mechanical optical path adjustment, thus significantly improving stability.

[0020] 4. Low cost and ease of use: Mature silicon-based integrated optical chip technology reduces the cost of discrete components, and the cost of a single device can be controlled within 10,000 yuan, which is significantly lower than the cost of traditional portable spectrometers. The spectrometer body has operation buttons and an LCD screen on its surface. Combined with an embedded data processing system (such as an ARM chip), it can output spectral data in real time, simplifying the operation process and allowing detection to be completed without a professional laboratory environment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an integrated handheld spectrometer according to the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of an integrated handheld spectrometer according to the present invention;

[0023] Figure 3 This is a structural diagram of an array waveguide grating for an integrated handheld spectrometer according to the present invention.

[0024] In the diagram: 1. Spectrometer body; 2. Light source system; 3. Optical integrated chip; 4. Detection system; 5. Embedded microcontroller; 6. Handle; 11. Operation buttons; 12. LCD screen; 31. Silicon substrate; 32. Arrayed waveguide grating; 33. Adjustable optical filter; 34. Temperature modulation device; 322. Straight waveguide section; 323. Bent waveguide section. Detailed Implementation

[0025] To make the technical means, creative features, and objectives of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please see Figure 1-3 This utility model provides a technical solution: an integrated handheld spectrometer, comprising:

[0029] Spectrometer body 1: The spectrometer body 1 is made of lightweight engineering plastic such as ABS. The spectrometer body 1 is equipped with a handle 6, which is designed in an ergonomic grip shape. The surface is equipped with operation buttons 11 and an LCD screen 12.

[0030] Optical integrated chip 3: Integrated on silicon substrate 31, including beam splitting module array waveguide grating 32, focusing module and at least one adjustable optical filter 33, to realize beam splitting, filtering and focusing of incident light. Silicon substrate 31 is fixedly installed inside the spectrometer body 1.

[0031] Light source system 2: Located at the front end of the spectrometer body 1, it includes a light source emission port and has a built-in LED light source or halogen tungsten lamp light source to provide broadband or monochromatic excitation light;

[0032] Detection system 4: Located at the rear end of the spectrometer body 1, it includes a light signal receiving window and a built-in CCD / CMOS detector, which can convert light signals into electrical signals;

[0033] Embedded microcontroller 5: It adopts an ARM chip and is fixedly installed inside the spectrometer body 1. It is electrically connected to the optical integrated chip 3 and the detection system 4 through circuit connection lines. It has a built-in spectral analysis algorithm and outputs spectral data in real time.

[0034] Adjustable optical filtering technology: The adjustable optical filter 33 integrates a temperature modulation device 34, such as a miniature thermoelectric cooler TEC and a temperature sensor. By adjusting the filter temperature accuracy to ±0.1℃, its center wavelength tuning range of 10-5nm can be dynamically changed to adapt to the detection needs of multiple scenarios.

[0035] Z-shaped arrayed waveguide grating: From the top view of the optical integrated chip 3, each channel waveguide of the arrayed waveguide grating 32 is formed by alternating straight waveguide portion 322 and curved waveguide portion 323 to form a Z-shaped broken line structure. Compared with the traditional straight waveguide, the splitting efficiency is improved by 3%, and the resolution can reach the 0.05nm level.

[0036] To further explain, the adjustable optical filter 33, the light source system 2, the detection system 4, the operation buttons 11, and the LCD screen 12 are all electrically connected to the embedded microcontroller 5. The handle 6 is equipped with a rechargeable lithium battery to provide power to the entire spectrometer.

[0037] It should be noted that this utility model is an integrated handheld spectrometer. The spectrometer body 1 is internally divided into a light source cavity, an optical chip cavity, and a circuit cavity by a partition. The light emitted by the light source system 2 is guided into the incident end of the optical integrated chip 3 through a collimating lens, and then sequentially passed through an adjustable optical filter 33 and a Z-shaped array waveguide grating 32 for dispersion. Finally, it is focused by a focusing module to the detection system 4. The temperature modulation device 34 adjusts the filter temperature in real time through the PID controller of the embedded microcontroller 5. For example, when detecting pesticide residues in food, the center wavelength of the filter is adjusted to 34nm, corresponding to the characteristic absorption peak of organophosphorus compounds. The electrical signal output by the detection system 4 is amplified and converted from analog to digital. The embedded microcontroller 5 then analyzes the signal into a spectral curve using algorithms such as Fourier transform and displays it on the LCD screen 12. Compared with existing integrated handheld spectrometers, this utility model significantly reduces size and cost through silicon-based integrated optical technology, while improving resolution and stability. It is suitable for rapid on-site detection in fields such as alloys, ores, environment, and consumer products.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated handheld spectrometer, characterized in that, include: The spectrometer body (1) is provided with a handle (6). An optical integrated chip (3) is integrated on a silicon substrate (31) and includes an arrayed waveguide grating (32) for beam splitting and an adjustable optical filter (33) for filtering. The silicon substrate (31) is fixedly installed inside the spectrometer body (1). The light source system (2) is located at the front end of the spectrometer body (1) and is used to emit a detection light source; The detection system (4) is located at the rear end of the spectrometer body (1) and is used to receive optical signals and convert them into electrical signals; An embedded microcontroller (5) is fixedly installed inside the spectrometer body (1) and is used to process and analyze electrical signals to obtain spectral information.

2. The integrated handheld spectrometer according to claim 1, characterized in that, The adjustable optical filter (33) is connected to a temperature modulation device (34), which includes a miniature thermoelectric cooler and a temperature sensor.

3. The integrated handheld spectrometer according to claim 1, characterized in that, The arrayed waveguide grating (32) includes multiple channel waveguides, each of which is composed of alternating straight waveguide portions (322) and curved waveguide portions (323).

4. An integrated handheld spectrometer according to claim 3, characterized in that, From the top view of the optical integrated chip, the straight waveguide portion (322) and the curved waveguide portion (323) form a Z-shaped array waveguide grating.

5. An integrated handheld spectrometer according to claim 2, characterized in that, The spectrometer body (1) is provided with operation buttons (11) and an LCD screen (12) on its surface, and the handle (6) is ergonomically shaped.

6. An integrated handheld spectrometer according to claim 5, characterized in that, The adjustable optical filter (33), the light source system (2), the detection system (4), the operation button (11) and the liquid crystal display screen (12) are all electrically connected to the embedded microcontroller (5).

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