Shortpass Filters are also called infrared cut-off filters. Generally, a light beam in a certain wavelength range is required to be transmitted, and the light beam deviating from this wavelength is changed to reflection (or cut-off). Usually, we call filters that reflect (cut-off) the short-wave region and transmit the long-wave region long-wave pass filters. On the contrary, filters that reflect (cut-off) the long-wave region and transmit the short-wave region are called short-wave pass filters.

Shortpass filters are an important optical element in the field of optics. Their characteristics are that they allow short-wave light to pass through and cut off long-wave light. The short-wave pass filters we produce have high transmittance, high cut-off depth, and steep transition band. Conventional shortpass filter can cut off to 1200nm. AOS Optics can customize ultra-long cut-off ranges, such as cutting off to long waves to 2000nm. In addition, the short-wave transmission range is as short as 200nm; the conventional cut-off depth is OD4; AOS Optics can accept customized cut-off filters with higher cut-off depths.

Short pass filters are mainly used in laser protection, ultraviolet light sources, heat reflection lighting systems, digital imaging, stage lighting fingerprint recognition, ink recognition systems, etc. They are also widely used in optical experiments, spectral measurement, industrial measurement, medical analysis, biochemical testing, scientific instruments and other fields.