45results about How to "Low excitation voltage" patented technology

Provided is an electron beam apparatus in which an electron beam emitted from an electron gun is separated by a plurality of apertures, images of said apertures are reduced in more than two stages to form multi-beams on a sample surface and to scan said sample thereby, and secondary electrons from said sample are passed through an objective lens, where distances between said secondary electrons are extended, further through an E×B separator, where said secondary electrons are separated from the primary beam, and finally onto secondary electron detectors, where said secondary electrons are detected, wherein a lens defined in the second step for reducing said image of the aperture is composed of two stage lens and an enlarged image of the secondary electron is formed on a position between a first and a second lenses of said two stage lens, thereby reducing an aberration of the optical system for detecting the secondary electrons and allowing as many multi-beams as possible to be formed in the vicinity of a single optical axis.

Microcavity plasma devices and arrays of microcavity plasma devices are provided that have a reduced excitation voltage. A trigger electrode disposed proximate to a microcavity reduce the excitation voltage required between first and second electrodes to ignite a plasma in the microcavity when gas(es) or vapor(s) (or combinations thereof) are contained within the microcavity. The invention also provides symmetrical microplasma devices and arrays of microcavity plasma devices for which current waveforms are the same for each half-cycle of the voltage driving waveform. Additionally, the invention also provides devices that have standoff portions and voids that can reduce cross talk. The devices are preferably also used with a trigger electrode.

A kind of magnetic-current liquescent soft startup device, including ring flange which integrates with drive shaft, ring flange connects on the shell, and drive shaft is set up in the shell, field electric coil is set up on the drive shaft, outside the field electric coil magnetism insulation ring and inside retainer on which inside friction disks are set interval are set up orderly, flux rings are set up on both ends right-and-left of the magnetism insulation ring and inside retainer. Outside retainers are set up on the shell inner circle, and on the outside retainers inside friction disks are set working in the inside friction disks, space is set aside to fill in magneto fluid used as power delivery mediator. In the shell, lock ring and packing gland are set up on one side of the left flux rings and the right flux rings are fixed joint with ring flange of the drive shaft. This invention eliminates of heat by fans through its circumrotating, it has simple structure, small volume, big delivery moment of force, perfect elimination of heat nature, high efficiency of elimination of heat, long operating life and broad practicability.

The invention discloses a medium-power carbon dioxide laser tube, which is mainly characterized in that the discharge tube (4) and the water-cooled tube (6) are placed in a large gas storage tube (5), and the two ends of the large gas storage tube are connected to the Water-cooled tube burning, the discharge tube and water-cooling tube components placed in the large gas storage tube are provided with at least two groups, and the ends and tails of each component are burnt to each other to form a Π shape, a V shape, a Z shape, or a W shape. Shaped series optical path, each of the discharge tubes communicates with the large gas storage tube through the gas return tube (2), the initial end of the first discharge tube is provided with a total reflection mirror (9), and the end of the last discharge tube is provided with an output A coupling mirror (7), and a total reflection turning mirror (1) is provided at the head and tail burn-in ports of each discharge tube, and the inner electrodes of each discharge tube are respectively electrically connected to a DC power supply. The design of the present invention is successful, its volume is small, its weight is light, it is not affected by temperature changes, its output power and light spot mode are stable, and it adopts DC power supply segmental excitation, effectively reduces the excitation voltage, increases the control range of output power, and can be widely used Used in laser processing industry.