ANVIS visual deficiencies

Question 1

Name the Operational Defects for the ANVIS:

Answer 1

• Flashing, flickering, or intermittent operation: Image may flicker or flash. Can occur in both or either monocular.
• Edge glow: bright area in the outer portion of the viewing area.
• Shading: Each monocular should present a full circle, if this isnt the case, shading may be present.
• Emission points: is an electrical short in the micro-channel plate caused by debris in the manufacturing process.

Question 2

Name the cosmetic blemishes associated with the ANVIS:

Answer 2

• Image distortion: trees or poles appearing to wave or bend when you move your head.
• fixed pattern noise (honeycomb): blemish characterized by a hexagonal pattern in viewing area.
• Image disparity: exists when there is a difference in brightness between the two image intensifiers within the same binocular.
• Chickenwire: irregular pattern of dark lines in a field of view that is either part or entire viewing area.
• Bright spots: Signal induced blemishes in the image area, caused by a flaw in the film on the MCP.
• Output brightness variation: Areas of varying brightness in or across the image area.
• Black spots: Blemishes in an image intensifier, or dirt/debris in between the lenses.

Question 3

What are the two groups of visual deficiencies associated with the ANVIS?

Answer 3

• Operational defects

- Cosmetic blemishes

Question 4

OSAP:

Answer 4

-Optimal sight adjustment point.