Narrowband filter main role is to make a specific wavelength of light through, so that reflects other wavelengths of light (or attenuation) of the optical element. Half-wave width is usually controlled at 20nm or less, can be ultraviolet, visible, near-infrared wavelength, the far-infrared band. My company's narrowband filter multilayer subdural by ion assisted deposition of high vacuum evaporation nanomaterials made dense film is good, high-resolution imaging. Applications: 440nm laser, 440nm blue diode, infrared cameras, medical instrumentation, fluorescence microscopy analysis equipment, tunable laser, ink recognition Size: 1) 11mm × 14.0mm × 1.1mm 2) the diameter of 25.4 ± 0.1 × 1.1 ± 0.1mm 3) 7.0mm × 7.0mm × 1.10mm 4) can be customized according to customer demand Material: K9 transmittance "90% cut-off depth: OD6 incidence angle: 0 ° or 45 ° surface quality: 40/20 Aperture> 90% of the wavelength changes with temperature: 85% peak transmittance> 85% of the half-bandwidth: 40nm ± 2nm cutoff: 200nm ~ 400nm, 500nm ~ 1100nm cutoff rate: T <0.1% Appearance requirements: 60/40 Features: Monolithic do not use glue-type glass thin, only 1.1mm thickness, plating dura, long life, wavelength positioning accuracy, ion deposition, temperature drift, penetration rate, high cut-off depth.