Abstract: An ultrasonic probe according to the present invention includes: an ultrasonic element unit for transmitting and receiving an ultrasonic wave while carrying out ultrasonic scanning; a storage portion for storing the ultrasonic element unit; and an acoustic medium liquid charged in the storage portion. The ultrasonic element unit is supported by an elastic supporting member, and the storage portion is sealed by the supporting member in a liquid-tight state.

Abstract: An ultrasonic probe according to the present invention includes: an ultrasonic element unit for transmitting and receiving an ultrasonic wave while carrying out ultrasonic scanning; a storage portion for storing the ultrasonic element unit; and an acoustic medium liquid charged in the storage portion. The ultrasonic element unit is supported by an elastic supporting member, and the storage portion is sealed by the supporting member in a liquid-tight state.

Abstract: An ultrasonic diagnostic apparatus comprises at least one piezoelectric transducer which is moved in a scanning process. A first transmission signal and a second transmission signal are different from each other. One of the first and second transmission signals is selectively applied to the transducer. The transducer converts the applied one of the first and second transmission signals into a beam of corresponding ultrasonic wave. The transducer emits the ultrasonic wave beam toward an examined body and receives an echo of the ultrasonic wave beam from the examined body. The transducer converts the received echo into a corresponding received signal. A first signal processor and a second signal processor have different characteristics. The received signal is selectively applied to one of the first and second signal processors to be processed thereby. A sectional image of the examined body is generated on the basis of an output signal from one of the first and second signal processors.

Abstract: An apparatus for working an aspherical surface on a workpiece including a mechanism for adjusting a position of a workpiece in a horizontal direction, a rotary table having a vertical axis of rotation rotatably mounted on the adjusting mechanism, the rotary table including a work chuck for holding a workpiece on the rotary table, a spindle having a tool on a lower end thereof, a mechanism for rotating the spindle around an axial direction thereof and a compressed spring for supporting the spindle. A first mechanism adjusts a position of the tool in the axial direction of the spindle, the first mechanism including a sliding plate for sliding the spindle in the axial direction thereof.

Abstract: An f.multidot..theta. lens system for use in an apparatus such as a facsimile, machine laser printer, and the like for scanning and recording by a laser beam. The lens system minimizes the amount of image distorted in the sagittal direction and provides equal angular scanning velocity, high brightness and high resolution. The lens system comprises five serially disposed lenses the first of which is a positive meniscus lens whose concave surface is directed toward the incident side of a laser beam, the second lens is a negative meniscus lens whose concave surface is directed toward the incident side of the laser beam, and the third to fifth lenses a positive meniscus lenses whose concave surfaces are directed toward the beam incident side, wherein these lenses satisfy particular conditions relating to the radii of curvatures of their surfaces, lens thickness, refractive indices and lens-to-lens distances.

Abstract: Processing of plural works can be made simultaneously by using divided laser beams which is issued from one large Co.sub.2 laser beam source, the dividing being made by one or more rotary chopper mirror(s) comprising reflecting parts and light passing parts, and its ration and pulsive start and stop of laser oscillation are controlled in interrelated manner and by controlling the duty time of the laser oscillation in PWM manner. The distribution of powers of the laser beams divided by the rotary chopper mirrors is desirably selectable, thereby enabling simultaneous processing of plural works under the different processing conditions.

Abstract: In a polygon mirror construction comprising a polygon mirror with a hole formed at the central position for passing through a shaft of a motor and a supporting means fixed to the shaft of the motor for supporting the polygon mirror, and a space, a groove or a heat insulating plate is formed between the polygon mirror and the supporting means, thereby a heat rise of the polygon mirror is prevented and high accuracy of the polygon mirror construction is assured.