Method and photographic apparatus for performing motion studies on a moving subject. The moving subject is photographed through a rotating disc having at least one transparent aperture and a plurality of filter apertures covered with filter plates. Opaque regions of the disc separate the apertures from one another. Preferably, miniature spotlights are connected to moving points of the subject that are desired to be studied. Each of the spotlights projects a beam having essentially one selected w...

A passive infra-red ranging system for a photographic camera or the like includes two infra-red responsive sensors spaced apart a predetermined distance from one another on the camera body. Each sensor includes a plurality of vertically aligned segments which receive a portion of the infra-red radiation emitted from the subject(s) of principal interest. In one embodiment, the segments of the two sensors are scanned in a successive serial manner by scanning circuitry with the composite output of ...

Light projected from active lighting means or light projecting means toward an object is reflected by said object and a light spot is produced on a light sensitive element by the reflected light. A distance to said object is determined by sensing a position of said light spot. When a shade detector scanning the surface of the light sensitive element shields the light spot generated by the light reflected from the object, a photoelectric output from said light sensitive element is varied. Corresp...

Vehicle guidance system including means for projecting a beam of light to guide a vehicle such as an aircraft, and means for pulse coding the normally lower and upper portions of the beam whereby pulse coded signals are encountered by the aircraft following the beam on any departure into the pulse coded portions. The lower and upper pulse coded portions of the beam are differentiated by frequency and/or color coding. The duration of the pulses is also preferably varied in accordance with the deg...

A method and apparatus for precisely evaluating the lubricity characteristics of various oils and greases while they are under load and in motion and subject to variations in temperature.

An electrical synchroscope, modified to accomodate a light source and a light sensitive device, both mounted on a vertically adjustable mechanism and facing each other through a slot in the dial of the synchroscope so that as the instrument pointer rotates it can block the light rays from the light sensitive device at different indicated points on the dial, this in turn initiating an externally operated electrical circuit.

Optical radar includes a linear transmitter diode array with each diode in the array being individually controllable for transmitting a light pulse on being triggered; and a receiver diode array is positioned in relation to the transmitter array in conjunction with optical imaging means such that a diode of the transmitter array is imaged on the ground on the same area which is seen by a particular diode of the receiver array so that a 1:1 relation is established between a diode providing a part...

A short-ranging laser system having an improved pulser which includes a drive pulse signal generator and a driver. The drive pulse signal generator is essentially a triggered bipolar avalanche transistor that outputs a drive pulse signal through a voltage shifting circuit to the driver. The driver is essentially two parallel-connected power MOSFETs that output a driver pulse to a GaAs heterojunction laser diode. By circuit design, the deadtime plateau is substantially reduced so that the laser r...

To measure the distance to a selected object, the range finder transmits infrared light in a beam having a straight limiting edge on one side. The object reflects light back from the illuminated region and a lens receives part of the light and creates an image of the illuminated region including the straight limiting edge on a plane inclined at an angle to the optical axis of the lens. A detector, including a photoelectric transducer part of which is masked by a mask having a straight edge, is m...

A remote sensing instrument using optical aperture synthesis comprises at least two independent remote sensing devices each comprising at least two light collecting means delivering light beams and having a selected field of view and a selected resolution and further comprising recombination means adapted to recombine interferometrically the light beams delivered by said devices so as to deliver a final light beam associated with a resolution better than or equivalent to the lowest resolution of...