93results about How to "Shorten the propagation distance" patented technology

To achieve a solid-state laser element capable of outputting a high-power laser, in a planar waveguide type solid-state laser element that causes a plurality of fundamental laser beams to oscillate in a direction of an optic axis within a flat plate-like laser medium, and forms a waveguide structure in a thickness direction of the laser medium, which is a direction perpendicular to a principal surface of the flat plate-like laser medium, the laser medium is separated in a principal-surface width direction of the laser medium, which is a direction perpendicular to the direction of the optic axis and the thickness direction of the laser medium, by a groove extending in the direction of the optic axis within the laser medium.

Flowmeters are disclosed herein that include one or more flow path features for improving the measurement accuracy or other aspects of the flowmeter. A flowmeter can include an elongate body having a first end and a second end and a flow path extending between the first and second ends along a longitudinal axis. An ultrasonic transducer can be disposed in a measurement section of the flow path and configured to emit ultrasonic waves into a material flowing through the flow path. First and second protrusions can be formed in a conditioning section of the flow path upstream from the measurement section, the first and second protrusions extending radially inward from a sidewall of the flow path and being configured to reduce swirling flow through the measurement section.

A light guide composition includes a substrate and a first microstructure layer. The substrate has a first main surface. The first microstructure layer is disposed on the first main surface. A refractive index of the substrate with respect to a first light wavelength is greater than a refractive index of the first microstructure layer with respect to the first light wavelength, a refractive index of the substrate with respect to a second light wavelength is smaller than a refractive index of the first microstructure layer with respect to the second light wavelength, and the first light wavelength is smaller than the second light wavelength.

The invention adopts a radio frequency gas discharge manner to excite the inert gas plasmas and provides a device for generating a vacuum ultraviolet light source. The device comprises four parts: a central cylindrical shaped interaction cavity, a coaxial circular power charge light source cavity, a radio frequency spiral resonance excitation cavity and an ultrahigh vacuum flange connection component. The device uses a circular tube made of magnesium fluoride crystal materials as its optical window; the vacuum ultraviolet light is generated in the coaxial circular power charge light source cavity on the outer wall of magnesium fluoride circular tube, then penetrates and is radiated into the central cylindrical shaped interaction cavity so that the light could act on a target material directly. In this manner, the travel distance of the light rays is shortened; the effective size of the light source is increased; the beam-divergence angle is reduced; and the utilization efficiency of the light source is increased. According to the invention, the device adopts an electrodeless radio frequency charge manner to excite the gas plasmas, and produces vacuum ultraviolent photons with specific wavelengths by filling different inert gases. Through the adjustment of the parameters of the gases like gas pressure, radio frequency and power, it is possible to adjust the output power of the vacuum ultraviolet light so as to meet the requirements of various applications on the light source.