Circular-step neutral-density optical filter GCO-07 series

coloredbroadbandBK7

Circularly variable neutral density filters are designed to simplify attenuation and beamsplitting from VIS to near IR. The optical density gradually varies around a 270 circle for convenient attenuation adjustment by simply rotating the filter. Attenuation is achieved by a thin Ni-Cr-Fe film, allowing these attenuators to withstand moderate laser energy as well as to act as variable beamsplitters. Circularly variable ND filters are available with BK7 substrates for general laboratory use, or with UV fused silica substrates for maximum thermal stability. Although the coatings are optimized for 400-700nm, they will operate from 400-1100nm with only minor losses. The GCO-07 series Round Continuously Variable Metallic Neutral Density Filters installed on a rotary-axis holder, enabling 360° rotational adjustment. Equipped with angle scales, the minimum graduation is 2°. Circularly variable neutral density filters are designed to simplify attenuation and beamsplitting from VIS to near IR. The optical density gradually varies around a 270 circle for convenient attenuation adjustment by simply rotating the filter. Attenuation is achieved by a thin Ni-Cr-Fe film, allowing these attenuators to withstand moderate laser energy as well as to act as variable beamsplitters. Adapters for M6 mounting holes are included with each filter, enabling compatibility with GCM-03 series posts. 360° Rotational Adjustment and Minimum Graduation 2° Matieral：H-K9L Reflvetive Neutral Density Filters