Abstract
In the production and quality control of transparent and translucent materials such as plastics, films, glass, and LCD panels, color consistency, haze, and light transmittance are core indicators for measuring product performance. Traditional testing equipment often suffers from limitations such as single function, complex operation, and insufficient data accuracy, making it difficult to meet the demand for one-stop measurement. This paper takes the LISUN HM-700 Haze Light Transmission Meter as the research object, and combines its technical parameters, functional characteristics, and application scenarios to conduct a detailed analysis of the core advantages of this equipment in the detection of transparent and translucent materials. By interpreting the equipment’s standard compliance, measurement accuracy, operational convenience, and scenario adaptability, this paper expounds its practical value in multiple industries, providing technical references for enterprises to improve product quality control efficiency and reduce testing costs.
1. Introduction
Transparent and translucent materials are widely used in fields such as packaging, electronics, construction materials, and displays. Their optical properties directly affect the product’s appearance, user experience, and functional stability. For example, excessively high haze of food packaging films will affect the visibility of the contents; color deviation of LCD panels will lead to distorted display effects; and insufficient light transmittance of automotive glass may affect driving safety. Therefore, accurate detection of parameters such as color, haze, and spectral transmittance of these materials is a key link for enterprises to ensure product quality and meet market demands.
Under the traditional testing mode, enterprises usually need to use multiple devices such as haze meters and spectrophotometers to measure different parameters separately. This not only increases the cost of equipment procurement but also has problems such as cumbersome testing processes, difficult data integration, and low testing efficiency. As a professional manufacturer of testing instruments, LISUN Group has launched the HM-700 Haze Light Transmission Meter, which innovatively integrates haze measurement, color analysis, and light transmittance detection functions into one, realizing “one-stop” detection of transparent and translucent materials. This paper will comprehensively analyze the technical value and practical significance of this equipment from aspects of its working principle, technical parameters, functional advantages, and application scenarios.
2. Working Principle and Core Functions of the Haze Light Transmission Meter
2.1 Working Principle
The LISUN HM-700 Haze Light Transmission Meter is based on the principle of optical transmission. It realizes the comprehensive measurement of optical parameters of transparent and translucent materials by precisely controlling the light source, optical filters, and detectors. Its working process is mainly divided into three stages: light source emission and modulation, sample transmission and optical signal separation, and signal detection and data calculation.
In the light source emission stage, the equipment selects a specific light source (such as CIE-A, CIE-D65, etc.) according to the measurement requirements, and modulates the light source into a stable parallel light beam through the optical system. In the sample transmission stage, after the light beam passes through the sample to be tested, it is divided into direct light and scattered light. The direct light maintains its original propagation direction, while the scattered light changes direction due to the internal structure of the sample (such as impurities, grain boundaries, surface defects). The equipment separates the two types of light through a dedicated optical component. In the signal detection stage, the detector receives the light intensity signals of direct light and scattered light respectively, and calculates the haze (the ratio of scattered light to total transmitted light), transmittance (the ratio of total transmitted light to incident light), and color parameters (values such as Lab and Luv based on the CIE standard color space) of the sample by combining the preset optical model and algorithm.
2.2 Core Functions
The core functions of the LISUN HM-700 Haze Light Transmission Meter focus on “one-stop measurement, high-precision analysis, and user-friendly operation”, which are specifically reflected in the following four aspects:
• Comprehensive Parameter Measurement Capability: It can simultaneously measure haze, total transmittance, spectral transmittance, and a variety of color parameters. Among them, the color parameters cover dozens of indicators such as Lab, LCh, CIE Luv, XYZ, whiteness (WI), yellowness (YI), platinum-cobalt index (Pt-Co), and Gardner index, meeting the testing needs of different industries for transparent and translucent materials.
• Multi-Standard Compatible Detection System: It strictly complies with authoritative domestic and foreign standards such as ASTM, ISO, GB, and JIS. For example, haze measurement complies with ASTM D1003 and GB/T 2410-08, and color measurement complies with CIE No.15 and ISO 7724/1. This ensures that the test results are universal and recognized, helping enterprises’ products meet the market access requirements of different regions.
• Flexible Light Source and Viewing Angle Configuration: It provides three light source options (CIE-A, CIE-C, CIE-D65) for haze measurement, adapting to lighting conditions in different scenarios. For color measurement, it offers 24 types of light sources (such as D50, D65, F1-F12, etc.) and two observation angles (10°/2°), which can simulate color perception effects in different usage environments and accurately evaluate the “metamerism” phenomenon.
• Intelligent Data Management and Operation: Equipped with a 7-inch Android-based capacitive touch screen, it supports intuitive touch operation. It comes standard with the “Haze QC” data analysis and management software for PC, which can realize data storage (supporting 20,000 values), curve plotting (spectral transmittance curve), report generation, and printing, greatly improving the management efficiency of test data.
3. Technical Parameters and Advantages of the LISUN HM-700 Haze Light Transmission Meter
3.1 Detailed Technical Parameters
The technical parameters of the LISUN HM-700 Haze Light Transmission Meter directly determine its detection accuracy and application range. The core parameters are shown in Table 1. From the parameters, this equipment performs well in wavelength coverage, repeatability, and sample adaptability. Especially, the haze measurement repeatability (≤0.05%) and transmittance resolution (0.01%) reach a high level in the industry, which can meet the demand for high-precision detection.
Table 1 Core Technical Parameters of LISUN HM-700 Haze Light Transmission Meter
HM-700 Haze Meter and Spectrophotometer(Transmittance)
Parameter Category
Parameter Name
Parameter Specification
Light Source Configuration
Haze/Transmittance Light Source
CIE-A, CIE-C, CIE-D65
Color Measurement Light Source
A, C, D50, D55, D65, D75, F1-F12, CMF, U30, DLF, NBF, TL83, TL84 (24 types in total)
Compliance Standards
Detection Standards
ASTM D1003/D1044, ISO13468/ISO14782, JIS K 7105, GB/T 2410-08, CIE No.15, etc.
Measurement Parameters
Optical Parameters
Haze (HAZE), Total Transmittance (T), Spectral Transmittance
Color Parameters
CIE Lab, LCh, CIE Luv, XYZ, Yxy, Hunter Lab, CMYK, Whiteness, Yellowness, Platinum-Cobalt Index, etc.
Optical Performance
Wavelength Range
400-700nm (visible light range)
Wavelength Interval
10nm
Optical Path Structure
0/d (Vertical Illumination, Diffuse Reflection Reception)
Illumination/Sample Aperture
16.5mm/21mm
Accuracy and Repeatability
Measurement Range
0-100% (Transmittance/Haze)
Resolution
0.01 unit
Repeatability
Haze ≤0.05% when haze https://www.lisungroup.com/news/technology-news/application-and-technical-analysis-of-haze-light-transmission-meter-in-the-detection-of-transparent-and-translucent-materials.html
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