NVG

Question 1

What are the components of the NVG tube?

Answer 1

Objective Lens, Photocathode, Micro-Chanel Plate, Ion Barrier, Power Supply, Phosphor Screen,Fiber Optic Inverter, Eyepiece Lens

Question 2

Objective Lens

Answer 2

Projects photons onto photocathode. Inverts image due to shape of lens.

Question 3

Photocathode

Answer 3

Releases electrons proportional to amount of incoming photons

Question 4

Micro-Chanel Plate

Answer 4

Amplifies electrons

Question 5

Ion Barrier

Answer 5

Prevents negatively charged electrons from stricking the phophor screen

Question 6

Power Supply

Answer 6

Provides 3.0 VDC to photocathode, MC plate, and phosphor screen

Question 7

Fiber Optic Inverter

Answer 7

Re-inverts image (upright)

Question 8

Eyepiece Lens

Answer 8

Focuses the image to the individual eye

Question 9

Automatic Brightness Control (ABC)

Answer 9

Regualtes brightness of the NVG Seeen when transitioning from low to highlight conditions

Question 10

Bright Source Protection (BSP)

Answer 10

Reduces brightness when photocathode is exposed to very bright light. Protects from going blind under gunfire

Question 11

What is the visual acuity under goggles on a good night?

Answer 11

20/25

Question 12

What is the visual acuity under goggles on a bad night?

Answer 12

20/75

Question 13

What is visual acuity unaided at night?

Answer 13

20/200

Question 14

The field of view with the NVG is ___?

Answer 14

40 degrees

Question 15

Name the cosmetic bemishes (FCBBIIO)

Answer 15

Fixed Pattern Noise (Honeycomb), Chicken Wire, Bright Spots, Black Spots, Image Distortion, Image Disparity, Output Brightness Varriation

Question 16

Fixed Pattern Noise

Answer 16

Hexagonal patter in the viewing area

Question 17

Chicken Wire

Answer 17

Irreguar dark lines that are square or hexagonal

Question 18

Bright Spots

Answer 18

small, non-uniform bright areas that may remain constant or flicker. Will go away if the light is blocked from the tube. Not to be confused with emission points

Question 19

Black Spots

Answer 19

Dirt or debris between lens

Question 20

Image Distortion

Answer 20

Vertical objects may bend or move. Ground may swell or sink

Question 21

Image Disparity

Answer 21

Different image between the tubes

Question 22

Output Birghtness Variation

Answer 22

Areas of varrying brightness. Not to be confused with shading

Question 23

Name the opperational defects (SEEF)

Answer 23

Shading, Edge Glow, Emission Points, Flickering

Question 24

Shading

Answer 24

Darking shading of an image that cannot be seen through that migrates inward

Question 25

Edge Glow

Answer 25

Bright area on edge of FOV that flickers or remains constant

Question 26

Emission Points

Answer 26

Steady or flickering points of light that do not go away. Remain when light is covered from tube

Question 27

Flickering

Answer 27

Self explanatory. Usually a connection problem

Question 28

What are the NVG considerations? (CALM WAD SOS)

Answer 28

Color Discrimination, Air/Ground Speed Limits, Lights, Magnification, Weather, Weapons, Aircraft Lighting, Depth Perception, Scanning Techniques, Obstruction Detection, Spatial Disorienation

Question 29

Phosphor Screen

Answer 29

Screen struck by electrons causing phosphor glow