Abstract: A leveling assembly for an interior wall system includes an elongate floor channel secured to the floor, a floor rail longitudinally disposed within the floor channel for supporting the wall panel, and levelers positioned along the floor channel. The levelers each include a base resting on the floor channel, a threaded rod projecting upwardly from the base, an outer threaded sleeve capable of telescoping movement over the threaded rod, and a threaded nut secured in an opening defined in a bottom surface of the floor rail. The threaded nut supports the floor rail. The levelers vertically space apart the floor rail from the floor channel.

Abstract: A multi-spectrum, multi-channel imaging spectrometer includes two or more input slits or other light input devices, one for each of two or more input channels. The input slits are vertically and horizontally displaced, with respect to each other. The vertical displacements cause spectra from the two channels to be vertically displaced, with respect to each other, on a single image sensor on a stationary image plane. The horizontal displacements cause incident light beams from the respective input channels to strike a convex grating at different respective incidence angles and produce separate spectra having different respective spectral ranges. A retroflective spectrometer includes a convex grating that, by diffraction, disperses wavelengths of light at different angles and orders approximately back along an incident light beam. A single concave mirror reflects both the input channel and the dispersed spectrum.

Abstract: A liquid mercury optical scintillator for simulating atmospheric laser scintillation effects is described which comprises a partially bounded mercury pool, a transducer operatively connected to the the pool for coupling vibrational energy to the surface of the pool, and a detector for measuring spatial irradiance variations in a laser beam reflected from the vibrating mercury surface which variations correspond to probability distributions matching atmospheric In-normal statistics.