Abstract: A new laser oscillation device is provided which is capable of readily cooling down a laser medium without employing any large-size complicated separate or discrete devices such as fan blowers while at the same time improving the laser oscillation efficiency to thereby easily generate high-output laser light. To this end, a Lorentz force drive electromagnetic pump means and a cooling means are provided in a way such that the Lorentz force drive electromagnetic pump means is operable to drive the laser medium while allowing the cooling means to cool down the laser medium being driven.

Abstract: The present invention provides a novel metal-vapor pulsed laser capable of being manufactured without using a large-sized laser tube or an expensive discharging circuit. The output and the efficiency of the laser can be improved economically and easily. The laser includes a laser tube having a cathode and an anode. A discharging circuit induces an electric discharge in the laser tube. A grid electrode is mounted close to the cathode of the laser tube. A preliminary discharge is produced between the grid electrode and the cathode to thereby induce a main discharge.

Abstract: A new laser oscillation device is provided which is capable of readily cooling down a laser medium without employing any large-size complicated separate or discrete devices such as fan blowers while at the same time improving the laser oscillation efficiency to thereby easily generate high-output laser light. To this end, a Lorentz force drive electromagnetic pump and a cooling device are provided in a way such that the Lorentz force drive electromagnetic pump is operable to drive the laser medium while allowing the cooling device to cool down the laser medium being driven.

Abstract: In a high-speed video camera, a light beam from a main lens (3) is split into a plurality of light beams having identical optical information, and then these plurality of light beams are intermittently transmitted to different positions of an imaging device (11) in sequence. As a beam splitter may be used a multi-lens assembly (8) or a prism (14) having a plurality of light-receiving surfaces. In order to intermittently transmit the plurality of light beams in sequence to the imaging device, an image-selecting rotary shutter (12) having a fan-shaped opening (12a) is used. This shutter (12) and another shutter (5) for defining exposure time are synchronized with each other, and also synchronized with a vertical sync signal from a sync generator. In order to establish synchronization an adjustable delay circuit (38) is used.