LISUN HSCD-860 Handheld Spectrophotometer: Research on a Portable Color Detection Device Based on Grating Spectroscopy and Array Sensor Design

Abstract
In modern industrial production, accurate color detection and consistent color control are crucial links affecting product quality. With the continuous upgrading of industrial intelligence, portable color detection equipment has become the preferred tool in various fields due to its flexibility and efficiency. The LISUN HSCD-860 handheld spectrophotometer, independently developed by LISUN GROUP, is a high-performance portable color detection device integrating grating spectroscopy technology and array sensor design. This paper will conduct an in-depth study on the technical principles, performance parameters, product characteristics and practical application scenarios of this equipment, aiming to provide a comprehensive reference for relevant industries in the selection and application of color detection equipment.

1. Introduction
Color, as an important visual attribute of products, directly affects consumers’ purchasing decisions and the market competitiveness of products. In industries such as plastics, printing and packaging, coatings and building materials, textile and clothing, food, hardware and home appliances, and automotive interiors, strict color control throughout the production process is required to ensure the consistency of product colors. Traditional color detection methods have limitations such as cumbersome operation, low measurement accuracy and poor portability, which can no longer meet the needs of modern industrial production.

The emergence of handheld spectrophotometers has solved the above problems. As a portable color detection instrument, it can quickly and accurately measure the color parameters of samples, providing a reliable basis for product quality control and color matching. The LISUN HSCD-860 handheld spectrophotometer, as a representative product in this field, adopts advanced grating spectroscopy technology and array sensor design, and complies with international standards such as CIE No.15 and ISO 7724-1 in research and development and manufacturing. It has the characteristics of simple operation, high measurement accuracy and strong stability, and is widely used in various industrial fields. This paper will conduct a detailed analysis and research on this equipment.

2. Technical Principles of LISUN HSCD-860 Handheld Spectrophotometer

2.1 Grating Spectroscopy Technology

The LISUN HSCD-860 handheld spectrophotometer adopts grating spectroscopy technology, which is a core technology for accurate color measurement. The grating, as a key optical component, can disperse the composite light emitted by the light source into monochromatic light of different wavelengths. When measuring, the light source irradiates the surface of the sample, and the reflected light is collected by the optical system and projected onto the grating. The grating disperses the reflected light into a continuous spectrum, and then the array sensor detects the light intensity of each wavelength. Through data processing and calculation, the spectral reflectance curve of the sample is obtained, and then various color parameters are derived based on the spectral reflectance curve.

Compared with traditional prism spectroscopy technology, grating spectroscopy technology has the advantages of high spectral resolution, uniform dispersion and wide wavelength coverage, which can effectively improve the accuracy and stability of color measurement. The LISUN HSCD-860 handheld spectrophotometer uses nano-integrated optical devices as spectroscopic components. Only an optical device with a thickness of 5 microns can achieve nanoscale spectroscopic capabilities, which greatly improves the measurement accuracy and stability.

2.2 Array Sensor Design

The array sensor is another key component of the LISUN HSCD-860 handheld spectrophotometer. The equipment is equipped with dual 16-group silicon photodiode array sensors, which can simultaneously detect the light intensity of multiple wavelengths. Compared with a single-point sensor, the array sensor has the advantages of fast detection speed and high detection efficiency, which can shorten the measurement time while ensuring measurement accuracy.

In the measurement process, after the monochromatic light dispersed by the grating irradiates the array sensor, each photodiode in the array sensor corresponds to a specific wavelength. The photodiode converts the optical signal into an electrical signal, and the electrical signal is transmitted to the data processing system for amplification, filtering and analog-to-digital conversion. Finally, the color parameters of the sample are calculated according to the corresponding algorithm. The design of the array sensor not only improves the measurement speed of the instrument, but also enhances the stability and reliability of the instrument.

2.3 Dual Optical Path Design

The LISUN HSCD-860 handheld spectrophotometer adopts a dual optical path design, which is an important technical measure to improve measurement stability. The dual optical path design means that the instrument has two optical paths: one is the measurement optical path, which is used to measure the signal of the sample; the other is the reference optical path, which is used to monitor the energy fluctuation of the light source.

During the measurement process, the light source energy may fluctuate due to factors such as voltage changes and temperature changes, which will affect the measurement results. The reference optical path can real-time monitor the energy fluctuation of the light source, and the data processing system will automatically correct the measurement results according to the monitored energy fluctuation, thereby effectively reducing measurement interference and improving measurement stability. Through the dual optical path design, the measurement repeatability of the LISUN HSCD-860 handheld spectrophotometer is optimized to ΔE*ab≤0.02, ensuring that the measurement speed, accuracy, stability and inter-instrument difference consistency all meet high standards.

3. Performance Parameters of LISUN HSCD-860 Handheld Spectrophotometer

The performance parameters of the LISUN HSCD-860 handheld spectrophotometer directly determine its measurement effect and application scope. The detailed performance parameters are shown in the following table:

LISUN Model	HSCD-780	HSCD-800	HSCD-860
Main Functions	Small Aperture Testing	High-precision Testing
Measurement Structure	D/8, SCI	D/8, SCI+SCE
Measurement Repeatability	ΔE*ab≤ 0.05	dE*ab≤0.04	dE*ab≤0.02
Difference Between Stations	N/A	dE*ab≤0.4	dE*ab≤0.2
Accuracy	0.01
Measurement Aperture	stable type with 1 aperture：Φ1mm	stable type and agile type with with 2 apertures：Φ11mm, ▽11mm	stable type and agile type with with 6 apertures：Φ11mm+Φ6mm+Φ3mm， ▽11mm+▽6mm+▽3mm
Measurement Indicators	Spectral reflectance, CIE-Lab, CIE-LCh, HunterLab, CIE-Luv, XYZ, Yxy, RGB, Color difference (ΔE*ab, ΔE*cmc, ΔE*94, ΔE*00), Whiteness (ASTM E313-00, ASTM E313-73, CIE, ISO2470/R457, AATCC, Hunter, Taube Berger Stensby), Yellowness (ASTM D1925, ASTM E313-00, ASTM E313-73), Blackness (My, dM), Staining fastness, Color fastness, Tint (ASTM E313-00), Color density CMYK (A, T, E, M), Metamerism index Milm, Munsell, Opacity, Strength (Dye strength, Tinting strength)
Light Source Conditions	A, B, C, D50, D55, D65, D75, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12, CWF, U30, U35, DLF, NBF, TL83, TL84, ID50, ID65, LED-B1, LED-B2, LED-B3, LED-B4, LED-B5, LED-BH1, LED-RGB1, LED-V1, LED-V2
Lighting Source	Full-spectrum balanced LED light source		LED+UV
Measurement and Observation Methods	Visual	Camera
Calibration	Intelligent automatic calibration
Software Support	Andriod, iOS, Windows, WeChat Mini Program
Accuracy Guaranteed	Ensure accurate measurement		Ensure first-level measurement accuracy
Field of View	2°, 10°
Integrating Sphere Diameter	20mm	40mm
Meets the Standards	CIE No.15, ISO7724-1, ASTM E1164, DIN5033 Teil7, GB/T 3978, GB 2893, GB/T 18833
Spectroscopic Method	Nano-integrated Optical Devices
Sensor	Dual 16-element silicon photodiode array
Wavelength Range	400~700nm
Wavelength Interval	10nm
Reflectance Measurement Range	0~200%
Reflectivity Resolution	0.0001
Measurement Method	Single measurement, average measurement (2-99 times)
Measurement Time	Approximately 1 second
Interface	USB, Bluetooth	USB	USB, Bluetooth
Screen	2.4 inch full-color touch screen	3.5 inch full-color touch screen
Battery Capacity	It can perform 8,000 consecutive measurements on a single charge, 3.7V/3000mAh.
Light Source Lifespan	1 million times in 10 years
Language	English and Chinese
Storage	Instrument: 10,000 data points; APP: Massive storage capacity

It can be seen from the table that the LISUN HSCD-860 handheld spectrophotometer has excellent performance in various aspects. In terms of measurement accuracy, its measurement repeatability is as high as ΔE*ab≤0.02, and the inter-instrument difference is ≤0.2, which can meet the high-precision color measurement needs of various industries. In terms of measurement indicators, it covers a variety of color parameters and evaluation methods, which can meet the different measurement needs of users. In terms of portability, the instrument is small in size and light in weight, and is equipped with a high-capacity battery, which can realize continuous measurement for a long time, making it convenient for users to carry out on-site measurement.

4. Product Characteristics of LISUN HSCD-860 Handheld Spectrophotometer

4.1 High Measurement Accuracy and Stability

The LISUN HSCD-860 handheld spectrophotometer achieves high measurement accuracy and stability through a series of advanced technical designs. In addition to the aforementioned grating spectroscopy technology, array sensor design and dual optical path design, the instrument also uses a zirconium material calibration whiteboard with Mohs hardness 9. This whiteboard does not change color with changes in temperature and humidity, supports automatic calibration, and ensures the long-term stability of the instrument.

Compared with similar ceramic or plastic whiteboards, the zirconium whiteboard has higher hardness and better stability, is not easy to scratch, and can maintain its optical performance for a long time. This provides a reliable guarantee for the long-term accurate measurement of the instrument. At the same time, the instrument complies with a number of international standards, and the measurement results are authoritative and reliable, which can be recognized by various industries.

4.2 Rich Measurement Functions

The LISUN HSCD-860 handheld spectrophotometer has a wealth of measurement functions, covering almost all color-related measurement indicators. It can not only measure basic color parameters such as spectral reflectance, CIE-Lab, CIE-LCh, but also calculate various color difference values, whiteness, yellowness, blackness and other evaluation indicators. In addition, the instrument also supports the measurement of color fastness, color density, metamerism index, Munsell value, hiding power, strength and other parameters, which can meet the diverse measurement needs of different industries.

For example, in the textile and clothing industry, the instrument can measure the color fastness of fabrics, providing a basis for evaluating the quality of fabrics; in the printing and packaging industry, it can measure the color density of printed matter, ensuring the consistency of printed colors; in the paint and coating industry, it can measure the hiding power and color matching effect of coatings, guiding the production and application of coatings.

4.3 Simple Operation and Strong Portability

The LISUN HSCD-860 handheld spectrophotometer adopts a humanized design, with a 3.5-inch full-color touch screen, which is intuitive and easy to operate. Users can complete various measurement operations through simple touch and click, without the need for professional training. At the same time, the instrument supports multiple operating systems such as Android, iOS, Windows and WeChat Mini Program. Users can connect the instrument to a mobile phone or computer through USB or Bluetooth to realize data transmission and processing. The APP can realize mass storage of data, which is convenient for users to manage and query measurement data.

In terms of portability, the instrument is small in size and light in weight, and can be easily carried by users. The battery capacity of 3.7V/3000mAh allows the instrument to measure continuously 8000 times on a single charge, which can meet the needs of long-term on-site measurement. Whether it is in the workshop, warehouse or construction site, users can use the instrument to quickly measure the color parameters of samples, improving work efficiency.

4.4 Wide Range of Optional Accessories

The LISUN HSCD-860 handheld spectrophotometer provides a variety of optional accessories to meet the measurement needs of different samples and application scenarios. The optional accessories include powder measurement boxes, powder measurement boxes with transparent glass slides, ISO17025 laboratory metrology reports, ceramic test substrates, 800 quartz cylindrical cuvettes, 12-color tiles, 24-color tiles, etc.

For example, when measuring powder samples, users can use the powder measurement box to load the sample, ensuring the accuracy of the measurement; when measuring liquid samples, the 800 quartz cylindrical cuvette can be used to hold the liquid, facilitating the measurement of the sample. The ISO17025 laboratory metrology report can provide users with authoritative metrology certification, ensuring the accuracy and reliability of the instrument’s measurement results. The rich optional accessories expand the application scope of the instrument, making it more adaptable to different measurement scenarios.

5. Application Scenarios of LISUN HSCD-860 Handheld Spectrophotometer

5.1 Plastics Industry

In the plastics industry, the color of plastic products is an important quality indicator. The LISUN HSCD-860 handheld spectrophotometer can be used for color detection and color difference analysis of plastic raw materials, semi-finished products and finished products. It can help manufacturers control the color consistency of products in the production process, avoid color differences caused by raw material changes, process adjustments and other factors, and improve product quality and market competitiveness. For example, in the production of plastic toys, the instrument can measure the color of plastic parts to ensure that the color of each toy is consistent, meeting the requirements of consumers and relevant standards.

5.2 Printing and Packaging Industry

In the printing and packaging industry, the color of printed matter directly affects the appearance and promotional effect of products. The LISUN HSCD-860 handheld spectrophotometer can be used for color measurement and color matching of printing inks, as well as color detection of printed matter. It can accurately measure the color density, color difference and other parameters of printed matter, ensuring that the color of printed matter is consistent with the design sample. At the same time, the instrument can also detect the metamerism of printed matter, avoiding color differences under different light sources, which is of great significance for improving the quality of printed matter and reducing customer complaints.

5.3 Coatings and Building Materials Industry

In the coatings and building materials industry, the color of coatings, paints, tiles, wallpapers and other products is an important factor affecting the decorative effect. The LISUN HSCD-860 handheld spectrophotometer can be used for color matching and quality inspection of coatings and building materials. It can accurately measure the color parameters of coatings and building materials, help manufacturers adjust the formula to achieve the desired color effect, and at the same time ensure the color consistency of products in the production process. For example, in the production of architectural coatings, the instrument can measure the color of coatings to ensure that the color of coatings used in the same building is consistent, improving the decorative effect of the building.

5.4 Textile and Clothing Industry

In the textile and clothing industry, the color of fabrics and garments is one of the key factors affecting consumers’ purchasing decisions. The LISUN HSCD-860 handheld spectrophotometer can be used for color detection and color fastness testing of fabrics and garments. It can measure the color parameters of fabrics, help manufacturers control the color consistency of fabrics, and at the same time test the color fastness of fabrics to washing, rubbing, light and other factors, ensuring that the color of garments does not fade or change color easily during use. This is of great significance for improving the quality of textile and clothing products and enhancing brand image.

5.5 Other Industries

In addition to the above industries, the LISUN HSCD-860 handheld spectrophotometer can also be widely used in food, hardware and home appliances, automotive interiors and other industries. In the food industry, it can be used for color detection of food such as fruits, vegetables, meat and beverages, helping manufacturers control food quality and shelf life; in the hardware and home appliances industry, it can be used for color detection of metal surfaces and plastic parts of home appliances, ensuring the appearance quality of products; in the automotive interior industry, it can be used for color detection of automotive seats, dashboards and other interior parts, ensuring the consistency and decorative effect of automotive interiors.

6. Conclusion

The LISUN HSCD-860 handheld spectrophotometer, as a portable color detection device based on grating spectroscopy technology and array sensor design, has the characteristics of high measurement accuracy, strong stability, rich measurement functions, simple operation and strong portability. It complies with a number of international standards, and its measurement results are authoritative and reliable. The instrument is widely used in various industrial fields such as plastics, printing and packaging, coatings and building materials, textile and clothing, food, hardware and home appliances, and automotive interiors, providing a reliable basis for product color detection, color difference analysis and consistency control.

With the continuous development of industrial intelligence, the demand for portable color detection equipment in various industries will continue to increase. The LISUN HSCD-860 handheld spectrophotometer, with its excellent performance and wide application prospects, will play a more important role in the field of industrial color control. In the future, with the continuous advancement of technology, it is believed that the LISUN HSCD-860 handheld spectrophotometer will be further improved and upgraded in terms of performance and functions, providing more powerful support for the development of various industries.

Tags：HSCD-860