Abstract: An electrodynamic optical scanner and stabilizer for a pointer and tracker used on a seeking device. The seeking device used for air to air missiles, air to ground missiles, or any other use of a scanner requiring scanning speed and accuracy with the ability to generate different scanning patterns.

Abstract: A flying spot scanner is utilized to scan a beam of laser radiation along a fixed spacial path on a moving web material. An optical detector assembly is positioned to receive radiation reflected from individual elements of the web to produce an electrical signal which is processed to determine and monitor the number of the individual web elements per unit length.

Abstract: A short fiber optic image transmitter receives an image produced by a fiberscope objective and transmits the image to the image receiving end of the flexible fiber optic bundle of the fiberscope. The short image transmitter is oscillated about an axis normal to its direction of image transmission for causing images transmitted thereby to scan across the image receiving end of the fiberscope bundle. Synchronous scanning of the opposite image emitting end of the fiberscope bundle renders the received images stationary and of enhanced resolution.

Abstract: An apparatus for concentrating light from a linear field on to a relatively small receiver disposed at the end of a rod light guide on the peripheral surface of which light emanating from the linear field is directed. The linear field is arranged substantially at the focal distance from a first concave strip mirror which is disposed so as to extend optically parallel to the field and reflects the incident light from the field to a second concave strip mirror which is optically parallel with the first mirror and forms therewith a substantially telecentric system and which, in turn, reflects the incident light to the peripheral surface of the rod light guide.

Abstract: A laser doppler anemometer includes a source producing a laser beam which is then split into a plurality of partial radiation beams. A common optical image-forming system illuminates a measuring volume by the partial radiation beams and receives the back-scattered signal radiation therefrom which is directed into a detector, and a partially reflecting mirror arrangement is positioned in the common optical imageforming system for the purpose of masking out scattered signal radiation leaving the common optical image-forming system. The partially reflecting mirror arrangement can comprise two mirrors disposed plane parallel to each other, and it can include light transmissive elliptical rings or strips. A pinhole diaphragm, adjustable in a direction orthogonal to the optical axis of the detector and through which the back-scattered signal radiation passes is also provided and precedes the detector.

Abstract: To excite a liquid-crystal display element, a square wave is applied to opposite electrodes of that element by a source of alternating voltage through a switching circuit which briefly short-circuits the display element, during every change of polarity of the voltage source, by connecting both electrodes to the same potential via a low-impedance path. As the display element discharges over that path, the source is open-circuited whereby energy consumption is reduced.