Results 201 to 210 of about 2,151 (227)
Some of the next articles are maybe not open access.

Saao standards for optical photometry

Astrophysics and Space Science, 1995
A review is given of the development of systems of photometric standard stars at the South African Astronomical Observatory. A brief historical perspective indicates how the Harvard E-regions were chosen as standard sequences and developed into a very precise Southern hemisphere system for UBV(RI) c photometry ...
D. Kilkenny, A. W. J. Cousins
openaire   +1 more source

National Ignition Facility small optics laser-induced damage and photometry measurements program [PDF]

open access: yes, 1999
The National Ignition Facility will require upwards of 25,000 small optical components in its various beam conditioning and diagnostic packages. A quality control program designed to ensure that the elements meet the required specifications will test ...
Sheehan, L   +3 more
exaly   +1 more source

Determination of optical constants by photometry

Journal of Physics D: Applied Physics, 1983
A recent study of the accuracies of determining the optical constants of thin films, for film thicknesses up to 0.04 lambda , has been extended to include film thicknesses up to 0.25 lambda , and the results are reported. It is shown that the method may also be applied to bulk materials.
openaire   +1 more source

Optical photometry with the Kuiper Airborne Observatory

Publications of the Astronomical Society of the Pacific, 1983
The properties of optical photometric data obtainable with the 0.9-meter telescope of the Kuiper Airborne Observatory are described. The major differences between airborne and ground-based data are the absence of scintillation and the increased cosmic-ray background in the airborne data and the large size and vibration of the airborne images.
E. W. Dunham, J. L. Elliot
openaire   +1 more source

Optics on a fractal surface and the photometry of the regoliths

Planetary and Space Science, 1993
The light scattered by a rough surface is calculated in a model where the surface is simulated by a mathematical fractal of dimension (2 < DH < 3) and fractal density in the projected area towards the observer ρH(0 < ρH < 1). The reflectance on such a surface is calculated in the special case of a “hemispherical” fractal, in both the geometric optics ...
openaire   +1 more source

Photometry, Radiometry, and Measurements of Optical Losses

2019
Preface: The revised 2nd edition of this practical book provides an expanded treatment and comparison of techniques used in advanced optical measurements, guiding its reader from fundamental radiometric and photometric concepts to the state-of-the-art in highly sensitive measurements of optical losses and in spectroscopic detection using coherent laser
openaire   +1 more source

Optics and photometry

1998
openaire   +1 more source

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