|
ABC (Automatic brightness control)
See AGC.
AGC (Automatic gain control)
AGC feedback circuitry optimizes the gain, or level of NVIS intensification. A sudden increase in radiance reduces or shuts down intensification so that the phosphor image dims and loses contrast. This protects the NVIS user from being blinded and disoriented by the flash of an explosion or flare. As soon as the radiance goes down, normal intensification resumes. AGC also increases intensification when ambient irradiation is low.
AN/AVS-6 goggles
See ANVIS, below.
AN/PVS-5 goggles
A Gen 2 NVIS for ground operations.
AN/PVS-7 goggles
A Gen 2 or unfiltered Gen 3 NVIS (with a single intensifier tube) for ground applications.
ANVIS (Aviator Night Vision Imaging System)
Know more precisely as AN/AVS-6 goggles, ANVIS is a Gen 3, Type I, Class A NVIS for use in helicopters and slow fixed-wing aircraft. The original MIL-L-85762 only addressed ANVIS and lighting compatible with it.
ANVIS compatible
Describes illumination compatible with ANVIS or the AN/AVS-6 goggles, as defined in MIL-L-85762. ANVIS compatibility is equivalent to Type I, Class A NVIS compatibility, as defined by MIL-L-85762A.
Blooming
Refers to the halo-like flaring around a display seen through the NVIS when the display emits a critical amount of radiant energy in the NVIS response range. MIL-L-85762A specifies a minimal amount of blooming in caution, master caution, and warning displays to get the pilot’s attention.
Cat’s Eyes
The Mark III Cat’s Eyes are a Gen 3, Type II, Class B NVIS developed by GEC in the United Kingdom. They are the standard for high-speed fixed-wing aircraft.
Class A
Refers to a 625 nm minus-blue filter added to a Gen 3 NVIS to reduce its sensitivity to visible light below the red band. Class A NVIS photoresponse is one percent at 595 nm.
Class B
Refers to a 665 nm minus-blue filter added to a Gen 3 NVIS to reduce its sensitivity to visible light, including most of the red band. Class B NVIS photoresponse is one percent at 625 nm.
|
