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Filters

Tempotec fabricate many kinds of optical filters including color glass filter, neutural density filter, band pass filter, IR cut filter, IR pass filter, birefringent filter, interference filter, etc..

Color Glass Filter It's fabricated by special color glass material. the material will absorption some wavelength and appeare different colors. The applications are including camerar filter, machine vision lens filter. Neutural Density Filter Neutral density (ND) filters are used to attenuate incident radiation without altering its spectral distribution. The neutral density value of an ND filter is related to the transmittance. Band pass Filter Bandpass filters are optical elements that are designed to transmit a specific spectral band with high efficiency, while reject others. The characteristics of the bandpass are controlled by multilayer dielectric coatings IR Cut Filter It's fabricated by special blue glass (BG39 from Schott or equivalent). The glass will absorb IR wavelength and let visible light pass. It widely used for digital camara. Laser line interference Filter By a cut-off type color glass filter with special multi layer coating, the intererence filter has a narrow pass band. Birefringent filter Tempotec birefringent filter is made by crystal quartz. It's used in the laser cavity for wavelength selection. We can provide different thickenss birefringent filter for our customer's laser applications.