초록 ▼

An opto-electronic transducer is provided for converting small displacements into optical intensity or phase variations which may then be converted into varying electric currents. A first optical fiber guide is disposed with its end face stationary, for example, while a second optical fiber guide is

An opto-electronic transducer is provided for converting small displacements into optical intensity or phase variations which may then be converted into varying electric currents. A first optical fiber guide is disposed with its end face stationary, for example, while a second optical fiber guide is disposed so that its free end may be laterally displaced from the axis of the first guide in proportion to the parameter to be measured. The sensitivity of the transducer is enhanced through the use of large core, large numerical aperture, multimode optical fibers. The opposed faces of the cooperating fibers are equipped with or are used to illuminate regular arrays of equally spaced opaque, absorptive, or reflective grating systems providing intensity or phase modulation of the propagating light energy in proportion to wave guide deflection.

대표청구항 ▼

Optical transducer means including: mounting means having at least first casing means with an inert damping fluid disposed therewithin, said first casing means including first pressure sensing diaphragm means which has a first time constant, first optical wave guide means disposed upon said mounting

Optical transducer means including: mounting means having at least first casing means with an inert damping fluid disposed therewithin, said first casing means including first pressure sensing diaphragm means which has a first time constant, first optical wave guide means disposed upon said mounting means and having a first longitudinal axis and a first end face, second optical wave guide means disposed upon said mounting means and having a second longitudinal axis and a second end face, said first and second axes being normally coincident at least in the unexcited state of said transducer means, whereby said first and second end faces then lie in substantially parallel relation and form a gap therebetween, first and second regular grating array means interposed in substantially parallel spaced relation within said gap substantially perpendicular to said first and second longitudinal axes, and suspension means adapted to permit relative displacement between said first and second regular grating array means in response to deflections of said first pressure sensing diaphragm means for modulation of light passing through said first and second regular grating array means.