Bandpass Filter against stray light
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Using a bandpass filter reduces disturbing backlight and eliminates scattering light and noise to increase your signal. All filters offer an efficiency of 85%!
When we ship a filter we take care about the "blue shift". This effect comes up while the laser heats up and changes its wavelength by 0.2 to 0.3 nm per °C. The bandwidth of the filter will be selected in order to fit the application.