Reflectivity is an important parameter to describe the ability of a material to reflect light, especially in reflective materials, the magnitude of reflectivity directly affects its reflective performance. So, how do you measure reflective material reflectivity? This article briefly introduces the measurement method of reflectance of reflective materials.
Reflectivity is the ratio of the reflected light to the incident light when it hits the surface of an object. The mathematical expression is: reflectivity ( ) = (reflected energy incident energy) 100%. Ideally, the higher the reflectivity, the greater the material's ability to reflect light.
1.Spectrophotometry: This method uses the principle of spectral analysis to disperse the incident light according to the wavelength, and measure the reflected energy at each wavelength, and then calculate the reflectance of the material. The method is highly accurate and suitable for laboratory measurements.
2.Integrating sphere method: An integrating sphere is a cavity sphere coated with a white diffuse reflective coating inside, in which light rays are reflected multiple times and then emitted evenly from the open surface. By measuring the intensity of light at the exit surface, the reflectivity of the material can be calculated. This method is easy to use and suitable for fast measurements.
3.Image measurement method: This method calculates the reflectivity of the material by capturing the reflection image of the material surface and extracting the information such as the reflection area and brightness by using image processing technology. This method has the advantage of being contactless, fast, and real-time.
The specific measurement process can be referred to: "Measurement of reflectivity of reflective materials, choose YS4580 spectrophotometer!" 》
1.Prepare the sample: Select a representative sample of reflective material and ensure that the surface is clean and flat.
2.Choose a measuring instrument: Choose the right measuring instrument according to the actual needs, here we choose the YS4580 spectrophotometer.
3.Set measurement parameters: Set the appropriate incident light source, incident angle, observation angle, measurement mode and other parameters according to the instructions for use of the instrument.
4.Start measuring: Hold the YS4580 spectrophotometer in your hand, attach the measuring port of the instrument to the reflective material, measure according to the operation steps, and record the data.
5.Data processing: According to the software supplied with the instrument or the program written by itself, the measurement data is processed and analyzed, and the reflectivity is calculated.
6.Verification of results: Verify the accuracy of measurements by comparing them with other materials with known reflectivity or calibrating with standard samples.
1.Wavelength of incident light: Different wavelengths of light may have different reflectivity on the surface of a material, so choosing the right wavelength range is critical to accurately measuring reflectivity.
2.Angle of incidence and angle of observation: The angle at which the light hits the surface of the material and the angle at which the reflected light is observed can affect the reflectance measurement. Therefore, it is necessary to ensure the consistency of the angle of incidence and the angle of observation during the measurement.
3.Cleanliness and flatness of the sample surface: Stains, scratches, or irregularities on the sample surface can cause distortion of the measurement results, so the sample surface should be cleaned and leveled before measurement.
4.Environmental factors: Environmental factors such as ambient temperature, humidity, and barometric pressure can also have an impact on reflectance measurements, so measurements need to be made under constant ambient conditions.
Guangzhou Baolaifa Instrument Co., Ltd. products are widely used in domestic printing, coatings, auto parts, metals, home appliances, gold standard test strips, food safety, medical testing and other industries and scientific research institutions, while the industry application range is still expanding, the company unremittingly carries out technology research and development and brand service to ensure the stability of the company's products, and is committed to providing users with high-quality products and services with technology. The main color colorimeter, spectrophotometer, hyperspectral camera, standard light source box, gloss meter, haze meter, thickness gauge, resolution test card, image test card, test software and other color matching system products and provide solutions.
This article is provided by Baolaifa, for more details, please see the official website of Baolai Hair colorimeter manufacturer.
Guangzhou Baolaifa Instrument Co., Ltd. products are widely used in domestic printing, coatings, auto parts, metals, home appliances, gold standard test strips, food safety, medical testing and other industries and scientific research institutions, while the industry application range is still expanding, the company unremittingly carries out technology research and development and brand service to ensure the stability of the company's products, and is committed to providing users with high-quality products and services with technology. The main color colorimeter, spectrophotometer, hyperspectral camera, standard light source box, gloss meter, haze meter, thickness gauge, resolution test card, image test card, test software and other color matching system products and provide solutions.
This article is provided by Baolaifa, for more details, please see the official website of Baolai Hair colorimeter manufacturer.