ANVIS 6

Question 1

Where should you look during your OSAP?

Answer 1

Something high contrast that is 50m away

Question 2

What are operational defects?

Answer 2

Defects relating to the reliability of the image intensifier and are an indication of stability, if identified are a cause for immediate rejection

Shading, Edge Glow, Flashing, Flickering, intermittent Operation, Emission Points

Question 3

What is shading?

Answer 3

Each monocular should present a full circle, if shading is present a full circle will not appear

Question 4

What is edge glow?

Answer 4

A bright area, sometimes sparkling, in the outer portion of the viewing area

Question 5

What is flashing, flickering or intermittent operation?

Answer 5

The image may appear to flicker or flash, this can occur in one or both monocular

Question 6

What is emission points?

Answer 6

A steady fluctuation of pinpoint bright light in the image area that does not go away when all light is blocked from the objective lense

Question 7

What is a cosmetic blemish?

Answer 7

Usually a result from manufacturing imperfections that do not affect the image intensifier reliability and are not normally a cause for rejection

Bright spots, black spots, fixed pattern noise (honey comb), chicken wire, image disparity, output brightness variation, image distortion

Question 8

What are bright spots?

Answer 8

Caused by a flaw in the film on the MCP. Small and not uniform and disappears when light is blocked out

Question 9

What are black spots?

Answer 9

Usually from dirt or debris between the lenses, also be from sun exposure

Question 10

What is fixed pattern noise (honeycomb)?

Answer 10

Usually from viewing bright lights, a faint hexagonal pattern will appear

Question 11

What is chicken wire?

Answer 11

An irregular pattern of dark think lines in the FOV

Question 12

What is image disparity?

Answer 12

Exists when there is a difference in brightness between two image intensifier assemblies

Question 13

What is output brightness variation?

Answer 13

Varying brightness in or across the image area

Question 14

What is image distortion?

Answer 14

Vertical objects appear to have a wave or bend

Question 15

How do you know there is low battery associated with your NVGs?

Answer 15

Red LED at the bottom of the mount, indicates there are 30 minutes left

Question 16

How much weight can you have as a counterweight for your NVDs?

Answer 16

No more than 22oz

Question 17

What are the NVG considerations?

Answer 17

Color-no colors in the NVG
Airspeed limits-don’t out fly the visibility from the aircraft
Lights- be aware of whiteout, halo, tunnel vision
Magnification-there is none
Weather-can see through obscurations, may fly into IMC
Weapons-guns can blind you with auto brightness control
Aircraft lighting-no red lighting in cockpit, blue/green only
Distance/Depth-difficult to estimate
Scanning techniques- need to turn head and eyes
Obstruction detection-wires and towers are hard to see
Spatial D- avoid abrupt attitude changes, 30* max recommened

Question 18

What are the NVG considerations?

Answer 18

Color-no colors in the NVG
Airspeed limits-don’t out fly the visibility from the aircraft
Lights- be aware of whiteout, halo, tunnel vision
Magnification-there is none
Weather-can see through obscurations, may fly into IMC
Weapons-guns can blind you with auto brightness control
Aircraft lighting-no red lighting in cockpit, blue/green only
Distance/Depth-difficult to estimate
Scanning techniques- need to turn head and eyes
Obstruction detection-wires and towers are hard to see
Spatial D- avoid abrupt attitude changes, 30* max recommend

Question 19

What are the NVG characteristics?

Answer 19

D: A helmet mounted, light intensification device that allows aircrews to conduct operations at terrain flight altitudes during low ambient light levels
I: 2000-3500 x light intensification
A: Best acuity is 20/40 with ideal conditions and proper OSAP
L: limited field of view of 40*
V: voltage low indicator when voltage drop to 2.4, signaling 30 min left
P: power supply is 2 AA batteries

Question 20

What does OSAP stand for?

Answer 20

Optimum
Site
Adjustment
Point

Question 21

How does NVGs function?

Answer 21

Objective Lens: captures reflected light and inverts image
Photocathode: converts reflected light into electrons
Micro-Channel Plate: intensifies electrons
Phosphor Screen: turns intensified electrons into visible picture
Power Supply: provides 3.0 vdc
Fiber Optic Inverter: re-inverts image
Eyepiece Lens: how eye views image