Abstract: A method and apparatus for holographically processing optical signals in a fiber-optic sensor system. In the present invention, holographic processors are utilized in various combinations with light sources, fiber-optic transmission means, sensors and detectors to provide low cost, compact, sensitive and accurate sensor systems.By means of the holographic processors of the present invention, the aforementioned sensor systems are used to monitor such physical parameters as temperature, pressure, flow-rate, and the like, and to provide output signal indications thereof that are compatible with digital receiving stations and immune to electro-magnetic interference, hazardous atmosphere, and the inimical effects of inadvertent intensity variation due to equipment vibration and the like.

Abstract: An inexpensive, light weight fiber optic accelerometer to convert input mechanical motion (e.g. acceleration) into digitized optical output signals. The output of the accelerometer may be connected directly to data processing apparatus without the necessity of space consuming analog to digital interface means.

Abstract: An inexpensive, lightweight fiber optic micro-sensor that is suitable for applications which may require remote temperature sensing. The disclosed temperature sensor includes a phosphor material that, after receiving incident light stimulation, is adapted to emit phosphorescent radiation output signals, the amplitude decay rate and wavelength of which are functions of the sensed temperature.

Abstract: Optical sensor apparatus and associated means by which to color multiplex optically encoded information signals over a compact fiber optic transmission system. The sensor apparatus includes a movable coded masking means. The masking means is fabricated with a plurality of parallel rows, each of which rows comprising a binary weighted pattern of alternately spaced transparent and opaque areas. Incident white light is spectrally dispersed, so that each of the rows of the masking means receives a respective color. As the masking means is moved in response to an input physical parameter that is to be sensed, the corresponding binary coded output color signals that are transmitted through the transparent areas of the masking means are recombined and multiplexed over either a singel optical fiber or a bundle of incoherent optical fibers.

Abstract: A temperature sensor comprising an optical transducer member having an array of birefringent crystals. The length and, accordingly, the sensitivity to temperature change of successive birefringent crystals varies according to a particular relationship. The transducer is interconnected with a fiber optic transmission and detecting system. Respective optical output signals that are transmitted from the birefringent crystals via the fiber optic transmission system are detected and decoded so as to correspond to digits of a numbering system, whereby an accurate digital representation of temperature can ultimately be provided.