Focus detection system with zero crossing detection for use in o

Focus-type encode device

Focused laser beam measurement system and method of beam locatio

Focused line identifier for a bar code reader

Focused optical beam encoder of position

Focusing method

Foil-type pressure sensor

Folded-path optical analysis gas cell

Folding apparatus of a web-fed printing press including a...

Follower finger sheet separating apparatus

Force measuring apparatus with optical sensor enabling limitatio

Force-feedback input device

Force/pressure detection device utilizing a monomode optical fib

Foreign object detecting method and device

Foreign object insertion detector device

Foreign particle inspection apparatus

Forward and back scattering loss compensated smoke detector

Frame detection circuitry for microfilm reader apparatus

Frequency correlator having a non-linear optical fiber

Frequency division and/or wavelength division multiplexed...