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          產品展示

          吸收型濾光片

          Absorptive ND filters are one of simple light attenuators to be used to control the amount of light, They possess level spectral transmittance characteristics in the visible region and attenuate light by absorption with minimal reflection. they do not affect the colors of the light Since the filters have low dependency on wavelengths and optically neutral. Absorptive ND filters are useful in light control applications for measuring instruments and exposure control in imaging.
           

          Specifications

          Item                        
           Commercial
           High Precision
          Material: 
          Color glass from schott or equivalent
          Dimension X×Y(φ):  
          1×1mm~25.4×25.4mm;φ3~φ25.4mm
          Dimension tolerance:
          ±0.1mm
            ±0.03mm
          Parallelism:
          <3′
          <30″
          Clear aperture:
          85%
          Surface quality:
          MIL20-10
          Flatness(per 25.4mm):
           λ/4@ 632.8nm
           λ/8@ 632.8nm
          Optical density tolerance:
          Typical ±5%
          Coating:
          Specified by customer  

           

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