Zobrazeno 1 - 8
of 8
pro vyhledávání: '"77"'
Publikováno v:
SPIE Proceedings.
Measurements of the polarized radiation often reveal specific physical properties of emission sources, such as strengths and orientations of magnetic fields offered by synchrotron radiation and Zeeman line emission, and the electron density distribut
Publikováno v:
SPIE Proceedings.
We describe the design and optimization of a wide-field ne ar-infrared camera and spectrograph (NICAS) for Mt Abu 1.2 m, f/13 Cassegrain telescope of Physical Research Laboratory. The principal science goals include photometric mapping of star formin
Autor:
Gerard Anthony Luppino, Michael Eads, Majid Zandian, Ryan Bradley, Eric Moore, Mark Farris, Craig A. Cabelli, Selmer Anglin, Rick Demers, Min Xu, Donald E. Cooper, Richard Blank, Sid Bhargava, William Lavelle, Jing Chen, James W. Beletic, Raphael Ricardo, E. Piquette
Publikováno v:
High Energy, Optical, and Infrared Detectors for Astronomy V.
Teledyne’s H2RG focal plane arrays have been widely used in scientific infrared and visible instruments for ground-based and space-based telescopes. The majority of applications use the H2RG with 2.5 micron cutoff HgCdTe detector pixel at an operat
Publikováno v:
SPIE Proceedings.
A near infrared (NIR) and long-wavelength infrared (LWIR) dual-band infrared photodetector, which can switch detection bands with light bias, is demonstrated at 77 K. The demonstrated scheme consists of series connected photodetectors for different b
Autor:
Donald W. McCarthy, Roland J. Sarlot
Publikováno v:
Current Developments in Lens Design and Optical Engineering II.
A cryogenic mechanism has been built to correct for the blurring effects of atmospheric dispersion in adaptive-opticsimages from large aperture telescopes. Steward Observatory's 6.5m telescope features a deformable Cassegrainsecondary mirror compensa
Publikováno v:
Optical Astronomical Instrumentation.
We report on first astronomical results with a cross-dispersed optical echelle spectrograph fed by a near single-mode fiber. We also present on a novel design of a new adaptive optics (AO) optimized fiber-fed cross-dispersed echelle spectrograph. The
Publikováno v:
Instrumentation in Astronomy VIII.
The thermal conductivity, specific heat, and elastic moduli of silicon indicate that silicon is an attractive material for the substrates of large cryogenic mirrors. Elemental silicon is available in large single crystals as well as polycrystalline b
Publikováno v:
SPIE Proceedings.
The UCB submm heterodyne receiver is a complete system for high-resolution astronomical spectroscopy in the 350-micron and 450-micron atmospheric windows. This compact system mounts directly at the Cassegrain focus of large optical and IR telescopes.