Passive optical rangefinder

Passive optical rangefinder-sextant

Passive radio altimeter

Passive range estimation using image size measurements

Passive range finding apparatus utilizing television sensors

Passive rangefinder

Passive ranging system especially for use with an electro-optica

Passive ranging technique for infrared search and track (IRST) s

Passive ranging to a target reflecting solar radiation

Passive ranging to source of known spectral emission

Passive ranging to source of known spectral emission

Passive ranging to source of known spectral emission to cue...

Passive stereovision range finder

Passive target detector

Phase detector

Phase diversity ranging sensor

Phase diversity ranging sensor

Phase measurement method and application thereof

Phase noise compensation for interferometric absolute...

Photo detecting device, distance measuring apparatus, and...