Beauty Equipment 640nm long pass filter is satisfied that the macro filter manufacturers sales

Compared with traditional colored optical glass filters, I produced a short pass and long pass filters have a cutoff steepness large, high transmittance and a large backlit density advantage, and with the traditional method of optical glass complete different point, when the incident angle changes (rotational angle from 0 degrees to large), cut-off wavelength characteristics will move to shorter wavelength. This function can be used to fine-tune aspects of the system, and be able to get your desired wavelengths. Optical indicators: by bands: 640nm-1100nm minimum transmittance: T> 95% center wavelength: 640nm ± 3 cutoff wavelength: 350nm-615nm cutoff depth: T <0.01%