Filters are designed by their manufacturers to transmit or absorb different wavelengths of light. And optical filters are widely used in scientific experiments and industrial applications where that change is necessary. China star optics can supply a full range of filters, Color Separation Filter, Neutral Density Filter, Filter, Short/Long Wave Pass Filter,Bandpass Filter and Interference Filter High transmission, High wavelength precision, High pass band transmission, High blocking, High stability. Applications: Spectrum Devices, Fluorescence Analytical Instruments, Biochemistry Devices. Medical and clinical instrumentation, Telecommunications, Analytical instrumentation