• Calibrated using NIST certified standards

• Four optical density values (OD 0.1, 0.3, 0.5, & 1.0)

• Five discrete calibration wavelengths (OD filters)

• Holmium Oxide filter

• Wooden storage case 

This is a convenient and practical set of secondary transmittance and spectral standards for the calibration of visible wavelength spectrophotometers. All calibrations are derived from National Institute of Standards and Technology (NIST) certified standards.

Newport\'s visible spectrum spectrophotometer calibration filter set provides the user with a set of secondary standards for everyday use in the calibration of spectrophotometric instrumentation.

Each set consists of four (4) absorptive glass optical density filters, one (1) holmium oxide filter, and one (1) blank filter holder. The filters are packaged in a hardwood storage case for protection and convenient storage. A calibration chart is included with the set. The optical density filters are calibrated using NIST certified secondary standards. Stated values of transmittance are accurate to ±1.0%. Transmittance will not vary more than ±1.0% of the stated value over the period of one year. Newport sets should be returned to Newport for periodic recalibration. Each optical density filter is calibrated at five discrete wavelengths: 440.0, 465.0, 546.1, 590.0 and 625.0 nanometers.

The holmium oxide filter is provided for use in wavelength calibration of spectrophotometers. A spectral scan is included for reference.

The blank filter holder is provided for use in the reference path of dual beam spectrophotometers during calibration to allow balancing of the sample and reference beams.

Set Contents