Optical pickup apparatus having improved holographic optical ele

Optical position sensor using coherent detection and polarizatio

Optical pressure detection method and apparatus

Optical pressure/density measuring means

Optical probe

Optical profiler for films and substrates

Optical scanning microscope

Optical scattering monitor

Optical sensing apparatus and method

Optical sensing arrangements

Optical sensing devices

Optical sensing systems

Optical sensor having a wave guide substrate with interferometer

Optical sensor system and method for detection of hydrides...

Optical sensor with intermodal interferometry

Optical signal monitor for multiwave optical signals

Optical signal rejection filter and application of said filter t

Optical smoke detector

Optical smoke detector inlet screen

Optical smoke detectors