Hazemeter is a special instrument for measuring the haze of transparent and translucent materials.

Intelligent high-precision haze meter for glass film (th-100)

Haze is the ratio of scattered light flux and transmitted light flux that deviates from the direction of incident light through the sample, expressed as a percentage. Generally, only the scattered luminous flux that deviates from the direction of incident light by more than 2.5 degrees is used to calculate haze.

working principle:
When a parallel beam is incident on a medium (such as transparent plastic Yang), due to the non-uniformity of material optical properties, surface defects, non-uniformity of internal organization, existence of bubbles and impurities, the beam will change direction (diffusion and deflection), and some disordered light generated is called scattered light. Internationally, it is stipulated that the ratio of the scattered luminous flux passing through the sample and deviating from the direction of the incident light to the transmitted luminous flux is expressed as a percentage, which is the so-called haze. The sample with high haze will give people a more blurred feeling. When the light passes through the sample, it will also produce loss, that is, the transmitted luminous flux passing through the sample is always less than the incident luminous flux irradiated on the sample. The ratio of the two, expressed as a percentage, is internationally defined as transmittance.
The reasons for the decrease of transmittance are the reflection of light on the two surfaces of the sample and the light energy absorption of the full wavelength or part of the wavelength of the incident light. In the process of testing the haze and transmittance of the sample, the incident luminous flux (T1), the transmitted luminous flux (T2), the scattered luminous flux of the instrument (T3) and the scattered luminous flux of the sample (T4) must be measured.
Calculation method of haze and transmittance:
Light transmittance: TT = T2 / t1x100%
Haze: H = [T4-T3 (T2 / T1)] / t2x100%
The haze value H formula can be simplified as: H (%) = [(T4 / T2) - (T3 / T1)] × 100%
Relationship between haze and transmittance:
Haze and transmittance are two very important optical performance indexes of transparent materials. In packaging applications, hazy films may reduce the quality feeling of consumers, such as the appearance of packaging products. Generally speaking, the haze value of materials with high light transmittance is low, and vice versa, but not completely. Some materials have high light transmittance but high haze value, such as ground glass. Therefore, transmittance and haze are two independent indicators.
Standard for selecting Hazemeter:
1. Light source. At present, the Haze Meter th-100 adopts LED light source. LED light source Hazemeter consumes less energy and has longer service life than halogen lamp Hazemeter. The haze meter of halogen lamp generally needs to change the light source once every 1-2 years. The haze meter of LED light source does not need to change the light source for ten years. Therefore, LED light source is the development direction of Haze Meter Industry in the future.
2. Measure the time. In order to meet the efficient detection work, the time of measuring samples by instruments is very important. Especially when many samples are measured, the long measurement time will greatly affect the work efficiency. The unique optical design of Haze Meter th-100 makes its measurement time only 2 seconds, which greatly improves the work efficiency.
3. Double standard. There are two main standards for haze measurement, ASM standard and ISO standard. The difference lies in whether there is light compensation. The color spectrum haze meter can manually select ASTM / ISO standard measurement according to the requirements of users, which can meet the standard requirements of all users. The color spectrum Haze Meter th-100 meets the dual standards of asto standard and ISO standard.
4. Sample bin. There are some brands of haze meters at home and abroad, and their sample bin is closed, which limits the size of the measured sample and brings a lot of inconvenience to the testing work. The Hazemeter th-100 and cs-700 adopt the open sample bin design, which not only liberates the limitation of the instrument on the sample size, but also ensures that the measurement results of the instrument are not affected by the ambient light
5. Large color screen display. Modern instruments stress that they have a good human-computer interaction interface and clear operation logic. The Hazemeter th-100 is equipped with a 5-inch TFT LCD screen, which is simple to operate and easy to use.
6. Qualified judgment. With the progress of economy and the improvement of product quality requirements of enterprises, the detection trend of haze parameter as QC is becoming more and more obvious. Therefore, the haze meter should be able to set the tolerance of haze value, compare the measurement results of standard sample and sample, and clearly judge whether the measurement results are qualified or unqualified. This is the required function of a haze meter.
7. Save data. In the era of intelligence, the emphasis is on efficiency and convenience. The testing, saving and viewing of data can be realized on one machine, which makes the testing work much more convenient. The Hazemeter th-100 can save 20000 groups of test data, and the previously saved data can be found in "data view".
8. Data output port. At present, many laboratories need to connect the instrument to the computer for operation. The staff hope that the instrument can realize massive data storage and print test reports. Nowadays, without data output port, it is difficult to meet the requirements of users. The Haze Meter th-100 comes with free computer data management software, which can connect the instrument to the computer to realize computer-side operation.
The above explanations represent the development direction of the haze meter industry and provide our users with very clear options.