Results 141 to 150 of about 697 (159)

On-Machine Measuring Instrument of Workpiece Compliance Using Laser Interferometer

2020 International Symposium on Flexible Automation, 2020
Abstract Workpiece vibration is a crucial issue in machining of thin-walled workpieces because of their large compliance. The workpiece compliance should be considered in setting machining conditions to suppress the vibration. However, the conventional impact test is laborious, and its result depends on the operator’s skill.
Masataka Furusawa, Daisuke Kono
openaire   +1 more source

Robust monolithic ultraviolet interferometer for the SHIMMER instrument on STPSat-1

Applied Optics, 2003
We describe the design, fabrication, and testing of a monolithic interferometer consisting entirely of optically contacted fused-silica optical elements that are assembled, adjusted, and permanently bonded in place. The interferometer is part of a spatial heterodyne spectrometer (SHS) [SHIMMER (Spatial Heterodyne Imager for Mesospheric Radicals)] that ...
John M, Harlander, Fred L, Roesler, Christoph R, Englert, Joel G, Cardon, Robert R, Conway, Charles M, Brown, Jeff, Wimperis   +6 more
openaire   +2 more sources

Using the instrument transfer function to evaluate Fizeau interferometer performance

Optical Design and Fabrication 2017 (Freeform, IODC, OFT), 2017
Advances in test procedures and analysis techniques now enable reliable instrument transfer function measurements to 1000 cycles per aperture independent of several traditional sources of uncertainty and operator error.
Leslie L. Deck, Peter J. de Groot
openaire   +1 more source

Instrumental factors affecting the fringe contrast in optical interferometers

Astrophysics and Space Science, 1990
Interference fringes are the prime observable quantity in astronomical optical and radio interferometers. To maximize the signal-to-noise ratio it is important to keep instrumental causes of fringe contrast decrease to a minimum. I discuss these and derive the tolerances to be, placed on them.
openaire   +1 more source

An end-to-end Far-infrared Interferometer Instrument Simulator (FIInS)

SPIE Proceedings, 2014
FIRI (Far Infra-Red Interferometer) is a concept for a spatial and spectral Space interferometer with an operating wavelength range of 25-400 µm and sub-arcsecond angular resolution, and is based on the combination of Stellar Interferometry and Fourier Transform Spectroscopy to perform spectroscopy at high angular resolution in the Far Infrared.
Roser Juanola-Parramon, Giorgio Savini, Danielle Fenech, Catherine Walsh   +3 more
openaire   +1 more source

The Instrument Function of a Wide Angle Michelson Interferometer Spectrometer

Applied Optics, 1968
The instrument function of a wide angle Michelson interferometer spectrometer is derived in terms of known or easily measured functions using a novel method of computing the phase difference between the two beams. The interferometer essentially achieves immersion with solid materials and has the advantages of a larger field of view and fewer reflecting
openaire   +2 more sources

Novel reconfigurable wide-beam radio interferometer for space physics instrumentation

SPIE Proceedings, 2008
This paper describes the instrumentation design of a novel wide-beam interferometer system for radio astronomy studies. The system measures the Earth's or another planet's atmospheric layers attenuation of the highly energetic galactic electron emissions superimposed on the Cosmic Microwave Background (CMB) and other last scattering surface galactic
Dekoulis, George, Honary, Farideh
openaire   +1 more source

1.3 µm Traveling Wave Interferometer Modulator For Instrument Applications

SPIE Proceedings, 1987
A Ti:LiNb03 interferometer modulator has been fabricated for instrument applications in the 1.3 μm wavelength region. It requires only 3.5 volts switching voltage, and has a fiber-to-fiber insertion loss of -4 dB. This includes a propagation loss of 2 dB and a fiber/device coupling loss of ~ 1 dB/end. Frequency response measurements indicate an optical
openaire   +1 more source

Next Generation Instrumentation for the Very Large Telescope Interferometer

Astrophysics and Space Science, 2003
The scientific capabilities of the VLT Interferometer can be substantially enhanced through new focal-plane instruments. Many interferometric techniques — astrometry, phase-referenced imaging, nulling, and differential phase measurements — require control of the phase to ≲ 1 rad; this capability will be provided at the VLTI by the PRIMA facility. Phase-
openaire   +1 more source

Erratum: Interferometer-Schlieren Instrument for Aerodynamic Investigations

Review of Scientific Instruments, 1953
Robert E. Blue, John L. Pollack
openaire   +1 more source