AN/PVS-7

PVS-7 collimator assembly, comprising of multiple lens and a triangular prism to duplicate intensifier image from one 10130 tube to both eyes

when disassembled, the following components, comprising of lenses and rings would pop out in the following order

for the 1 component, insert the lens with the convex side facing towards the collimator housing

for the 2 step, insert one of the thick metal ring into the collimator housing

for step 3, inset the thick lens, convex side facing towards the collimator housing

for step 4, [1] there will be three components needed to be placed together in a bundle

for step 4, [2], place the metal ring onto a flat surface for convenience

for step 4, [3], place the lens onto the metal ring with the convex side facing towards the metal ring

for step 4, [4] place the thin metal ring onto the lens

Made by Litton Industries.