Neutral density filters are useful in the calibration of photometric, spectrophotometric, or radiometric systems. Calibrated filters are used to assess the dynamic range of detectors and optical systems. A set of transmittance standards offers a convenient way of checking the performance of any spectrophotometer.
Avian Technologies offers three types of filter:
- Schott Glass (TFS-NDG)
- Metal (Inconel) on Glass (TFS-ND)
- Metal on Quartz (TFS-NDU)
Filters are available in two formats
- 2” square
- Standard 10mm cuvettes, canted to eliminate inter-reflection error
Our filters are aged in an oxidizing atmosphere to aid in long-term stability.
Stock Neutral Density Filter Sets
Sets are calibrated with tabular data at 20 nm intervals and digital data at 1 nm intervals, traceable to NRC/NIST. All sets come boxed.
We also offer custom sets and single filters; contact us to discuss your specific application.