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25 Oct, 2022 617 Views Author: Cherry Shen

LISUN solution for haze, transmittance and light transmittance measurement

Characteristics of Haze Meter:
Haze is the percentage of the transmitted light intensity that deviates 2.5 ° from the incident light to the total transmitted light intensity.
Transmittance (T) refers to the percentage of the luminous flux transmitted through a transparent or translucent body and its incident luminous flux.

LISUN fogmeter is suitable for one-stop measurement solution of color, haze and transmissivity of transparent and translucent materials such as plastic, film, glass, LCD panel and touch screen.
1. Comply with ASTM and ISO haze measurement standards
2. Provide A, C and D65 kinds of measuring light sources for haze measurement
3. Provides color measurement function, measurement index and measurement light source
4. Open measuring area, which frees up the limitation of sample size
5. The 5.0 inch TFT display screen is adopted, with a good human-computer interaction interface
6. Provide haze, color and transmittance measurement and analysis software to meet the user’s analysis and management of test data

Introduction to the principle of haze meter:
Test principle:
In the test, when there is no incident light, the received luminous flux is 0%;
During the test, when the sample is not placed, the incident light is completely transmitted, and the received luminous flux is 100%, which is T1;
At this time, use the light trap to absorb the parallel light, and the received luminous flux is the scattered luminous flux T3 of the instrument;
Then place the sample, and the luminous flux received by the instrument through the sample is T2;
At this time, if the parallel light is absorbed by a light trap, the luminous flux received by the instrument is the sum of the scattered luminous flux T4 of the sample and the instrument.
The light transmittance and haze can be calculated according to the measured values of T1, T2, T3 and T4.

Key points of the method:
0% calibration and 100% calibration
Note: During calibration, the operation of compensation port shall be selected according to the current selection standard. If it is ISO standard, the compensation port cover cannot be closed, and the compensation port shall be kept open all the time; If it is ASTM standard, the compensation port shall be covered with the compensation port cover.
At 100% calibration, the incident luminous flux T1 and the scattered luminous flux T3 of the instrument will be obtained, and then saved for calculation of transmittance and haze.

ASTM Standards:
During the transmissivity test, the sample is placed at the test port, the paddle is automatically moved to the optical trap to block the optical trap, and the transmissive luminous flux T2 is obtained after one test.
During the haze test, the sample is placed at the test port, and the paddle automatically moves to the optical trap to block the optical trap. After one test, the transmitted luminous flux T2 is obtained, and then the paddle automatically moves to the compensation port to test once, and the scattered luminous flux T4 of the instrument plus the sample is obtained.

ISO Standards:
During transmissivity test, first place the sample at the compensation port, and the paddle will automatically move to the optical trap. Test once to obtain the incident luminous flux T1, replace the 100% calibrated T1 value, and then place the sample at the test port, with the paddle position unchanged. Test once to obtain the transmitted luminous flux T2.
During the haze test, the sample is placed at the test port, and the paddle automatically moves to the optical trap to block the optical trap. After one test, the transmitted luminous flux T2 is obtained, and then the paddle automatically moves to the compensation port to test once, and the scattered luminous flux T4 of the instrument plus the sample is obtained.

LISUN lauched Haze Meter and Spectrophotometer HM-700 is designed for color, haze, spectral transmittance and total transmittance measurement of transparent and translucent materials such as plastic sheets, films, glass, LCD panel and touch screen, etc.

HM 700 Haze And Transmittance Measurement

HM-700 Haze Meter and Spectrophotometer(Transmittance)

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are GoniophotometerIntegrating SphereSpectroradiometerSurge GeneratorESD Simulator GunsEMI ReceiverEMC Test EquipmentElectrical Safety TesterEnvironmental ChamberTemperature ChamberClimate ChamberThermal ChamberSalt Spray TestDust Test ChamberWaterproof TestRoHS Test (EDXRF)Glow Wire Test and Needle Flame Test.

Please feel free to contact us if you need any support.
Tech Dep: Service@Lisungroup.com, Cell/WhatsApp:+8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp:+8618117273997

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