Failure detecting optoelectronic sensor

Fiber optic refractometer

Fiber optic refractometer

Fiberoptic sensing of temperature and/or other physical paramete

Field test unit for windscreen optical evaluation

Filter regulator for microspectrophotometer

Flow cell

Fluid composition sensor using reflected or refracted light moni

Fluid detection system

Fluid sample analysis by optical fourier transform imaging

Fluid-sealed refractometer having data transmission means

Fluxes scintillometer

Focalization process of spherical concave diffraction gratings

Focus detecting unit, and refractive index measuring...

Frequency locking device

Gas detector tube reader

Guar gum composition and process for making it

Half-maximum threshold circuit for optical micrometer

Hand-held automatic refractometer

Handy refractometer