An optical tomographic diagnostic instrument developed for the acquisition of high-speed time-resolved images has been fielded at the Dual-Axis Radiographic Hydrodynamic Test (DARHT) Facility at Los Alamos National Laboratory. The instrument was developed for the creation of time histories of electron-beam cross section through the collection of Cerenkov light. Four optical lines of sight optic...

A differential absorption lidar (DIAL) instrument for automated profiling of water vapor in the lower troposphere has been designed, tested, and is in routine operation at Montana State University. The laser transmitter for the DIAL instrument uses a widely tunable external cavity diode laser (ECDL) to injection seed two cascaded semiconductor optical amplifiers (SOAs) to produce a laser transm...

A novel multi-wavelength photoacousticnephelometer spectrometer (SC-PNS) has been developed for the optical characterization of atmospheric aerosol particles. This instrument integrates a white light supercontinuum laser with photoacoustic and nephelometric spectroscopy to measure aerosol absorption and scattering coefficients at five wavelength bands (centered at 417, 475, 542, 607, and 675 nm...

I’hc Precision Optical Intcrfcromctcr in Space (POIN’1’S) is a free flying, space-hascd, as~romctric i ntc.rfcrmnc.try mission cmplo ying an inslrumc.nt with two 2-nvclcr bascl inc, intcrfcromctcrs whose baselines form an angle of 90°~ 3°. POIN’1’S will measure the angular clislancc. bclwccn two stars roughly 90° aparl to a precision of 5 microarcscconds @as). POIN”l’S is currently unrlcr joint...

We present a method for recognizing and interpreting the text labels for the instruments in an orchestra score, thereby associating staves with instruments. This task is one of many necessary in optical music recognition. Our approach treats the score system as the basic unit of processing. A graph structure describes the possible orderings of instruments in the system. Each instrument may appl...

Holographic optical tweezers have found many applications including the construction of complex micron-scale 3D structures and the control of tools and probes for position, force, and viscosity measurement. We have developed a compact, stable, holographic optical tweezers instrument which can be easily transported and is compatible with a wide range of microscopy techniques, making it a valuabl...

Pascal's ring is a hexagon each of whose corners represents one of the six cardinal points of an optical system and whose sides represent relationships of relative axial position of the cardinal points. Changes to the ring represent the axial displacements of the cardinal points of the visual optical system of an eye that are caused when a spectacle lens compensates for the ametropia. Pascal's ...

The ellipsometric film thickness measurement precision for equivalent oxide thickness as prescribed by the International Technology Roadmap for Semiconductors is quite high. Although short-term precision on a single ellipsometric instrument can be quite high, deviations of measured film thickness from instrument-to-instrument and from lab-to-lab for short-term and long-term periods of time need...

An instrument based on a scientific grade charge-coupled device (CCD) camera system is performance-qualified to evaluate the transmittance homogeneity of solid optical filter standard reference materials. Measurement results are presented for the new instrument, and compared, where appropriate, with an older, scanning instrument, for a variety of filters spanning transmittances down to 0.01. Th...