46results about How to "Wide range of variation" patented technology

A light oscillation part including an active layer for generating light by current injection, a tuning layer with an intermediate layer formed between the active layer and the tuning layer, for varying an oscillation wavelength by current injection and a diffraction grating formed near the active layer and the tuning layer, and a light amplification part including an active layer for amplifying light by current injection are formed on a semiconductor substrate. Light oscillation elements having wide wavelength variation ranges and the light amplification are integrated on a semiconductor substrate, whereby wide wavelength variation ranges can be obtained and the output light can be much increased.

The variable transconductance circuit includes: a voltage-current conversion circuit for outputting a current signal linear with an input voltage signal; first and second MOS transistors for converting the current signal received to a square-root compressed voltage signal; and third and fourth MOS transistors for converting the square-root compressed voltage signal to a linear current signal. A bias current at the first and second MOS transistors and a bias current at the third and fourth MOS transistors are varied to control transconductance.

The invention discloses a dual-mode composite infrared electric control liquid crystal micro-lens array chip which comprises a chip shell, an electric control light divergence liquid crystal micro-lens array and an electric control light condensation liquid crystal micro-lens array. The electric control light divergence liquid crystal micro-lens array and the electric control light condensation liquid crystal micro-lens array are in cascade coupling connection to form a dual-mode composite electronic speed controller framework. The electric control light divergence liquid crystal micro-lens array and the electric control light condensation liquid crystal micro-lens array are both arranged inside the chip shell, are tightly attached to each other and are connected with the chip shell. The optical axis of the electric control light divergence liquid crystal micro-lens array coincides with the optical axis of the electric control light condensation liquid crystal micro-lens array. The light incident plane of the electric control light divergence liquid crystal micro-lens array and the light emergent plane of the electric control light condensation liquid crystal micro-lens array are exposed out through an opening in the top face of the chip shell and an opening in the bottom face of the chip shell respectively. The dual-mode composite infrared electric control liquid crystal micro-lens array chip is compact in structure, capable of being used for forming various light beam forms, better in light field adaptability compared with a conventional electric control liquid crystal micro lens, high in control precision and capable of being coupled with a conventional infrared optics and optoelectronic mechanical structure easily.

A first electrode is integral to a beam having two ends securedly affixed to a support fixed onto a substrate. Residual stresses cause buckling of the beam so that the arch of the beam is close to at least one second electrode. The support can be formed by a ring fixed to the substrate by means of two fixing bases arranged on each side of the ring on a fixing axis passing through the centre of the ring, the beam being arranged on a diameter of the ring perpendicular to the fixing axis. The ring comprises at least one layer tensile stressed along the fixing axis. The beam can comprise at least one layer stressed in compression along a longitudinal axis of the beam. The second electrode can be integral to an additional support, the beam being arranged between the substrate and the second electrode.

The output of a flow restricting ozone generator assembly is connected through a conveying chamber to a low pressure port of a venturi nozzle which is inserted into the water circulating plumbing of a pool or spa. The conveying chamber then stores the water vapors from the water flow through the nozzle which are communicated to the ozone generator to promote the reaction products hydroxyradical OH that is then drawn through the port to mix with the circulating water flow. A spring biased valve at the inlet to the ozone generator is urged to close upon the instance when the flow through the nozzle ceases, terminating the low pressure at its throat and thereby fully confusing the reaction products from inadvertent escape.

A variable-shape mirror is provided with: a support base; a mirror portion that is disposed to face the support base and that has, on a side thereof facing away from the support base, a mirror surface which is irradiated with a light beam; fixed portions that fix the mirror portion to the support base; and piezoelectric elements that are sandwiched between the support base and the mirror portion and that vary a shape of the mirror surface. Here, the piezoelectric elements are arranged closer to a center of the mirror portion than the fixed portions are.