Abstract: A speaker can have a main body with a generally spheroidal shape, which can be supported standing on its end. The speaker can include a subwoofer that faces forward. A plurality of mid-range drivers can be distributed around the sub-woofer, facing generally forward and radially outward. A plurality of tweeters can be distributed around the sub-woofer, facing generally forward and generally outward. The outer housing portion of the speaker can be covered with a fabric material. A user interface ring 162 can be touch sensitive to receive input, and can have a plurality of lights that can be illuminated separately to convey information to the user.

Abstract: The present invention comprises methods and apparatus utilizing multiple detectors to measure properties related to light scattered by particles. Characteristics of particles are determined from the measured properties.

Abstract: These methods and apparatus improve the determination of particle characteristics from information derived from light scattered by particles.

Abstract: Apparatus and methods for determining information about at least one particle by measuring light scattered from the particles. Scattered light is combined with light from a light source to produce an optical interference signal utilizing a plurality of beam splitting functions. Scattered light signals are corrected for signal components which are not derived from particle scatter.

Abstract: The present invention comprises methods and apparatus utilizing multiple detectors to measure properties related to light scattered by particles. Characteristics of particles are determined from the measured properties.

Abstract: The present invention comprises methods and apparatus utilizing multiple detectors to measure properties related to light scattered by particles. Characteristics of particles are determined from the measured properties.

Abstract: Apparatus and methods for determining information about at least one particle by measuring light scattered from the particles. Scattered light is combined with light from a light source to produce an optical interference signal utilizing a plurality of beam splitting functions. Scattered light signals are corrected for signal components which are not derived from particle scatter.

Abstract: An instrument for measuring characteristics of particles. A particle sample is introduced into a sample cell. The sample particles are subjected to gravitational or centrifugal forces wherein particle motion is dependent upon particle characteristics. The particles are illuminated by an illumination device to produce light scattered by the particles. The light is detected by at least one detector. Characteristics of the particles are determined from the detector signals.

Abstract: The present invention comprises methods and apparatus for measuring light scattering from particles and images of particles, and for combining size distributions from the measurements to produce a single size distribution over a larger size range.

Abstract: The present invention comprises methods and apparatus for measuring light scattering from particles and images of particles, and for combining size distributions from the measurements to produce a single size distribution over a larger size range.

Abstract: The present invention comprises methods and apparatus for measuring light scattering from particles and images of particles in the same sample cell utilizing two light sources.

Abstract: An instrument for measuring characteristics of particles. A particle sample is introduced into a sample cell. The sample particles are subjected to gravitational or centrifugal forces wherein particle motion is dependent upon particle characteristics. The particles are illuminated by an illumination device to produce light scattered by the particles. The light is detected by at least one detector. Characteristics of the particles are determined from the detector signals.

Abstract: The present invention comprises methods and apparatus utilizing multiple detectors to measure properties related to light scattered by particles. Characteristics of particles are determined from the measured properties.

Abstract: Method and apparatus are described for improving measurements of scattered light from particles by controlling multiple scattering and coincidence count levels. The scatter path in the particle dispersion and particle concentration are adjusted to reduce multiple scattering in ensemble particle scattering measurement. And the particle dispersion volume and particle concentration are adjusted to reduce coincidence counts in single particle scattering measurements. Alignment of the optical system, for measuring scattered light, is maintained by a reflection apparatus.

Abstract: Apparatus and methods are described for determining information about at least one particle by measuring light scattered from the particles. Scattered light is detected from a region of a particle dispersion or from a larger region in a generally collimated illumination beam. Scattered light is also detected from a plurality of regions for improvement of repeatability.

Abstract: Method and apparatus are described for improving measurements of scattered light from particles by controlling multiple scattering and coincidence count levels. The scatter path in the particle dispersion and particle concentration are adjusted to reduce multiple scattering in ensemble particle scattering measurement. And the particle dispersion volume and particle concentration are adjusted to reduce coincidence counts in single particle scattering measurements. Alignment of the optical system, for measuring scattered light, is maintained by a reflection apparatus.

Abstract: An apparatus and method for determining characteristics of particles, by measuring characteristics which are related to the velocity of the particles. Particle size distribution is determined from motion of the particles in an acceleration field, or from Brownian motion of the particles. Zeta potential and particle mobility are determined by measuring velocity related characteristics of charged particles in an electric field. Particle velocity characteristics are determined by measuring dynamic properties of light, which is scattered by the particles. A light source illuminates the particles. Scattered light, from the particles, is mixed with light, from the light source, onto at least one light detector. The detector produces a signal, which is indicative of velocity related characteristics of the particles. The velocity characteristics are also determined by measuring light scattered from particles moving through an illumination pattern, with a periodic intensity structure.

Abstract: An instrument for measuring characteristics of a particle sample by counting and classifying particles into selected ranges of particle characteristics. The particle concentration is reduced to the level where the probability of measuring scattering from multiple particles of interest at one time is reduced to an acceptable level. A light beam is projected through a sample space, through which the particles flow. As each particle passes through the beam, it scatters, absorbs, and transmits different amounts of the light, depending upon the particle characteristics. So both the decrease in the beam intensity, due to light removal by the particle, and light scattered by the particle, may be used to determine the particle characteristics, to classify the particle and count it in a certain range of particle characteristics.

Abstract: An apparatus and method for determining characteristics of particles, by measuring characteristics which are related to the velocity of the particles. Particle size distribution is determined from motion of the particles in an acceleration field, or from Brownian motion of the particles. Zeta potential and particle mobility are determined by measuring velocity related characteristics of charged particles in an electric field. Particle velocity characteristics are determined by measuring dynamic properties of light, which is scattered by the particles. A light source illuminates the particles. Scattered light, from the particles, is mixed with light, from the light source, onto at least one light detector. The detector produces a signal, which is indicative of velocity related characteristics of the particles. The velocity characteristics are also determined by measuring light scattered from particles moving through an illumination pattern, with a periodic intensity structure.

Abstract: An instrument for measuring characteristics of a particle sample by counting and classifying particles into selected ranges of particle characteristics. The particle concentration is reduced to the level where the probability of measuring scattering from multiple particles of interest at one time is reduced to an acceptable level. A light beam is projected through a sample space, through which the particles flow. As each particle passes through the beam, it scatters, absorbs, and transmits different amounts of the light, depending upon the particle characteristics. So both the decrease in the beam intensity, due to light removal by the particle, and light scattered by the particle, may be used to determine the particle characteristics, to classify the particle and count it in a certain range of particle characteristics.