Excellent visible light transmittance/reflectance measurement system

Integrated visible light spectrometer

Integrated xenon lamp, or halogen tungsten lamp, as light source

Built-in probe

Can realize textile color detection

Textile fabric transmittance detection, transmittance detection

Polymer material Nanomaterial transmittance detection, transmittance detection, reflectance detection

Glass transmittance detection

Semiconductor film thickness detection

LED bulb detection, etc.

Application example 1: Fabric reflectance measurement case

Test system is set up as shown above

Test requirements, calculate the ratio of reflectance in the near-infrared region 780-880nm and reflectance in the visible light region 610-710nm

1. On the left is a halogen tungsten lamp 350-2500nm light source, which is a bulb imported from Germany

2. In the middle is a reflective integrating sphere,

3. On the right is a spectral instrument SPM3-350-1050 using a Hamamatsu detector imported from Japan, with a wavelength range of 350-1050nm, a minimum resolution of 0.6nm, and an imported 600-line grating made in the United States

4. With a computer, data is collected via USB

Test process 1

1. Turn off the light source and collect electronic noise of the spectral equipment

2. Turn on the light source, set the exposure time to 1000ms, place the white board, and collect the reference spectrum

3. Remove the white board, place the object to be tested, and collect the spectrum of the object to be tested. The coordinate axis X-axis is the spectrum wavelength, and the Y-axis is the reflectivity corresponding to the wavelength

Application example 2: Reflectivity measurement of polymer materials/nanomaterials relative to quartz

Test process 1

1. Turn off the light source and collect electronic noise of the spectral equipment

2. Turn on the light source, set the exposure time to 500ms, place the whiteboard, and collect the reference spectrum

3. Remove the whiteboard, place the object to be tested, and collect the spectrum of the object to be tested. This data shows that the reflectance spectra of samples 1 and 2, sample 1 (the lower curve), the reflectance in the range of 350-1000nm is 72%, sample 2 (the upper curve), the reflectance in the range of 350-1000nm is 82%, the coordinate axis X axis is the spectrum wavelength, and the Y axis is the reflectance corresponding to the wavelength

Below is the official filter coating spectrum. By comparison, we can see that the measurement data of this device at 70% filter, 10% filter and 3% filter are exactly the same as the official data.

It should be noted here that the transmittance less than 10% is relatively difficult to measure because the light is weak and easily confused with noise, but thanks to the powerful spectral performance of our SPM3, we can accurately measure the transmittance even in weak light conditions.