The unit also has an additional “USER” position that allows for custom levels to be set for unique testing requirements. Internal filters provide a close match to the Spectral Energy Distribution of the Night Sky Spectra. The systems lightweight, compact format makes it an invaluable tool for NVIS evaluations and training. The LM-33-80A, when used with our LM-33-402M (USAF 1951 Medium Resolution Bar Chart), is the ideal choice when performing the MIL-STD-3009 System Level Visual Acuity Test. Calibration Data is supplied in both NVIS Irradiance and NVIS Lux.

NSN: 6920-01-534-7288

Key features

  • Portable
  • Battery operated

RELIABILITY

  • Reliable and vesatile
  • Internal filters provide a close match to the Spectral Energy Distribution of the Night Sky Spectra