Abstract: An optical waveguide path coupling structure is realized without requiring highly accurate alignment.

Abstract: The invention is of a vehicle interlock system which utilizes non-invasive, optically based methods for detecting and measuring levels of certain target chemical substances in the blood or tissues of a user in preventing operation of the vehicle by persons exhibiting higher (or lower) than prescribed levels of such chemicals. The system of the present invention is not limited to simply measuring blood alcohol levels as are presently available breathalizer-based interlock systems, but lends itself to use in detecting unacceptable systemic levels of virtually any chemical for which the system if programmed to measure. In addition, the present system includes components for positively identifying, and during the course of vehicle operation, re-identifying the intended user and alcohol or drug user testee.

Abstract: An ultra violet light sterilizing apparatus utilizing a silicon carbide (SiC) photodiode sensor is described. The ultraviolet light fluid sterilization apparatus includes a fluid chamber, at least one ultraviolet light source configured to emit ultraviolet light into the fluid chamber, and at least one ultraviolet light sensor that includes a silicon carbide photodiode. Each UV light sensor includes a sealed outer housing having an optically transparent window. A silicon carbide photodiode is located inside the housing adjacent the transparent window. Each UV light sensor also includes a signal amplification unit that includes an amplifier mounted on a printed circuit board located inside the housing. The UV sterilization apparatus also includes a controller configured to receive, as input, a signal from each ultraviolet light sensor.

Abstract: An optical printer includes magneto-optical storage elements (light switching elements) formed on a carrier body (substrate) of comparatively small dimensions. The light switching elements LZ on the substrate T are combined so as to form groups M which are separated from one another by an equidistant space a. Each group M is associated with a self-focusing lens LS so that the distances between all image points of a plurality of groups M on a record carrier Z are equal.