Abstract: Pattern projection apparatuses are placed on each other in a stack manner in a stripe pattern direction for projecting the same patterns. An image pickup apparatus (camera 1) is placed between the pattern projection apparatuses. The optical axes of the pattern projection apparatuses and the image pickup apparatus are aligned on the same plane parallel with the stripe pattern direction. On the plane, the principal points also become the same. An image of a stripe pattern is picked up directly by the image pickup apparatus without the intervention of a half mirror, etc., and is recoded. An image of the recoded stripe pattern is picked up by an image pickup apparatus (camera 2) and is decoded and the range of an object is measured by triangulation based on image correspondence points.

Abstract: An antenna base, a control circuit section, and a high-frequency circuit section are enclosed in an inner space defined by a housing and a radome. Inside this inner space, the control circuit section and the high-frequency circuit section are surrounded by the antenna base and the housing. A circuit GND common to the control circuit section and the high-frequency circuit section is electrically connected to the antenna base and the housing, and it is connected to a body GND through only capacitive impedance.

Abstract: A regulated ultrasonic generator operable for supplying a driving signal to an ultrasonic transducer is disclosed. The generator includes: a power supply; a bridge inverter circuit for generating a power signal having two alternating components of opposite potential; a timing circuit for generating a timing signal equal in frequency to the desired frequency of the power signal; a bridge driver circuit for periodically generating base drive signals for switching on the bridge inverter circuit; a bridge modulating circuit for controlling the amount of time during each cycle that the bridge inverter circuit is on so as to regulate the power content of the power signal; and means for supplying the power signal to the ultrasonic transducer.

Abstract: A radar warning receiver is provided having a police radar signal band discrimination circuit which generates evaluation signals, the state of which indicates the voltage level relative a threshold voltage of a discriminator output as the local oscillator is swept through the radar bands. The times during which the evaluation signals are in one state or the other are utilized to identify in which band the received signal is operating (e.g., X-band or K-band).

Abstract: A monopulse antenna feed system utilizing multiple modes within the feed. In one embodiment a TEM mode and one or two TE.phi..sub.11 modes are utilized in the antenna feed system to provide a data and a reference signal responsive to the one or two TE .sub.11 modes and to provide an error indicating signal responsive to the TEM mode that provides monopulse tracking operation. The relative phase of the TEM mode and the one or two TE .sub.11 modes is indicative of the off-axis orientation of a far-field source relative to the axis of the antenna system. The relative amplitude of the TEM mode is indicative of the angular departure the source from the axis.

Abstract: A method of determining the bearing "S" of a signal transmitter relative to a remote signal receiver. A signal pulse having a high signal to noise ratio is transmitted and sampled at closely spaced receivers displaced from the transmitter by a distance "D". Sampled phase components are derived at each receiver by deriving in-phase and quadrature components of the sampled pulse and by deriving the arctangent of each such component. The arrival time of the sampled pulses is measured by applying a least squares Gaussian fit to the modulus or to the amplitude envelope of the pulse samples. The difference ".delta.t" between the time of arrival of the pulse at each receiver is determined and then the approximate phase difference 2.pi..omega..delta.t between the sampled pulses is determined where ".omega." is the carrier frequency of the transmitted pulse. The phase difference is then applied to resolve the phase ambiguity of the phase components and the bearing "S" is then calculated.

Abstract: A braking device for focal plane shutter in a photographic camera, in which the braking device has a braking function in its reciprocating motion. The braking device is moved forward by a shutter opening member near the end of aperture opening by the shutter opening member, and is moved backward by the shutter closing member near the end of aperture closing. During its reciprocating movement, braking force is applied to the shutter opening and closing members, and, in association with forward movement of the shutter opening and closing members, synchro-switch contacts are closed, while they are opened in association with the backward movement thereof. Further, in association with return of the aperture opening member to its original position at the shutter charging, the braking device is made returnable to its initial position.