Security article with holographic or diffractive pattern

Security device with metameric features using diffractive...

Security diffraction devices difficult to exactly duplicate

Security element comprising basic reflective structures

Security system for optical plug-in connector

See-d-fish

Segmental readout device

Segmented 3-d hologram display

Segmented cane mach-zehnder interferometer

Segmented complex diffraction gratings

Segmented complex fiber gratings

Segmented optical guide that can be incorporated into a...

Segmented projection screen construction

Segmented retroreflective sheeting and methods of making and...

Segmented thin film add/drop switch and multiplexer

Segmented waveguide for large diameter fiber optic rotary joint

Selective emissivity coatings for interior temperature...

Selective interference light filter

Selective interference optical filtration system

Selective reflectors