Circular extinction contrast imaging microscope
Clip-on optical mounting structure
Close-up attachment lens for a binocular
Coarse and fine adjustment focusing apparatus for a microscope
Coarse and fine drives for a monocular
Coaxial drive for the object stage of a microscope
Collapsible binocular
Collapsible field glasses
Collapsible terrestrial telescope
Collapsible viewing instrument
Collimator/diopter assembly with folder optics for a night visio
Combat vehicle with a hatchway in its armored roof and including
Combined illuminated reticle and focus knob
Combined telescope and autocollimator
Common axis three mirror anastigmatic optic
Common-aperture optical system incorporating a light sensor...
Compact afocal reimaging and image derotation device
Compact binoculars for nighttime vision
Compact high resolution panoramic viewing system
Compact keplerian telescope