What is NVIS Green A?

It specifies that NVIS White for crew cockpit and utility lighting. NVIS Green A is grand fathered into the cockpit for certain applications, but not for new applications. The chromacity of NVIS White makes it a full spectrum light even though is appears to have a green tint.

What is NVG compatibility?

Compatibility means, in effect, the extent to which the lighting emissions and the NVG sensitivity range overlap each other. The smaller the overlap the more invisible the light will be to the NVG, for a given level of luminance, and so the more compatible the lighting is.

What is NVG lighting?

NVG friendly lighting is typically used for aircraft exterior lighting and certain warship lights. It is designed to be visible to NVG users at a certain distance, but not to have an adverse impact on NVG performance. Covert lighting is only visible through NVGs and invisible to the unaided viewer.

How to determine the level of NVIS radiance?

The process for determining the level of NVIS radiance is to make a spectral radiance measurement and then apply these weighting functions to the measured spectral data. The area under the combination of these curves, given by computing the integral, shows how much energy from the cockpit lighting would be “seen” by the NVG.

What are the different types of NVIS colors?

NVIS colors include Type 1 Class A NVIS Blue, NVIS Green A, NVIS Green B, NVIS White, and NVIS Yellow A. Additionally, for Class B cockpits we manufacture NVIS Yellow B and NVIS Red.

Which is the most sensitive measurement of NVIS?

NVIS radiance measurements are one of the most difficult lighting measurements to make. NVG’s are highly sensitive because they must amplify the limited light available in typical night time scenes, so it is critical that the NVIS radiance from lighting sources in the environment are lower than the night scene levels.

What kind of lighting is compatible with NVIS?

Type II Lighting compatible with any projected image NVIS (see 3.1.2) utilizing Generation III image intensifier tubes. Class A Lighting compatible with NVIS utilizing 625 nm minus blue objective lens filters (see 3.1.3) with the specifications in FIGURE 1.