Infrared catadioptric zoom relay telescope with an asperic prima
Inner focus type telescope
Interconnection of zoom operating member and zoom drive member
Interpupillary distance adjusting mechanism for use in binocular
Interpupillary distance adjustment mechanism for optical device
Keplerian finder optical system
Keplerian zoom finder optical system
Keplerian zoom finder optical system
Keplerian zoom finder optical system
Laser theodolite
Lens hood for a camera lens
Light intensifying device
Light transmitting device
Lightweight binocular telescope
Lightweight binocular telescope
Line of sight adjustment for night vision binoculars
Loupe hinge for magnification viewer
Low orbit missile-shaped satellite for electro-optical earth...
Low-cost, light-weight, compact binoculars
Magnification viewer