Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Ramsey K. Melugin"'
Autor:
Ramsey K. Melugin, Paul K. Davis
Publikováno v:
33rd Aerospace Sciences Meeting and Exhibit.
The Stratospheric Observatory for Infrared Astronomy (SOFIA) is a planned NASA facility consisting of an infrared telescope of 2.5 meter system aperture flying in a modified Boeing 747. It will have an image diameter of 1.5 arc seconds, an operating
Autor:
G. C. Augason, Steven D. Howard, Kenneth C. Lawton, Steven N. Wong, Ramsey K. Melugin, Jeffrey A. Young, Michael Scanlan, Dana S. Clarke
Publikováno v:
SPIE Proceedings.
A 46 cm diameter, lightweight, Amersil TO8E, fused-natural-quartz mirror with a single-arch cross section was tested at the NASA-Ames Research Center Cryogenic Optical Test Facility to measure its cryogenic distortion at 6.5 K. Then the mirror was re
Publikováno v:
Space Optics for Astrophysics and Earth and Planetary Remote Sensing.
The Space Infrared Telescope Facility (SIRTF) is an orbital, great observatory planned by NASA to enable diffraction-limited astronomical studies in the infrared from 2 μm to 700 μm. The telescope must be cryogenically cooled by Superfluid Helium a
Publikováno v:
Cryogenic Optical Systems and Instruments IV.
A thermal model of the dewar and optical system of the Cryogenic Optical Test Facility at NASA-Ames Research Center was developed using the computer codes SINDA and MONTE CARLO. The model was based on the geometry, boundary conditions, and physical p
Autor:
Robert P. Hanel, Ramsey K. Melugin, Walter F. Brooks, George L. Sarver, Jeffrey M. Lee, Lawrence A. Manning
Publikováno v:
Cryogenic Optical Systems and Instruments IV.
The Space Infrared Telescope Facility (SIRTF) mission based on a cryogenically cooled telescope is described. The SIRTF makes it possible to perform background limited measurements with three focal plane instruments in the wavelength range 2-700 micr
Publikováno v:
Cryogenic Optical Systems and Instruments IV.
A 50 cm diameter, lightweight, Amersil TO8E, fused-natural-quartz mirror with a single arch cross section was tested at the NASA/Ames Research Center Cryogenic Optics Test Facility to measure cryogenic distortion and hysteresis. The mirror was cooled
Publikováno v:
SPIE Proceedings.
The SIRTF (Space Infrared Telescope Facility) optical subsystem, including the primary mirror, has been modeled using lumped-parameter techniques and a thermal and cryogenic transient analysis program developed previously. Since silica mirrors have b
Publikováno v:
SPIE Proceedings.
Earlier work funded by DARPA, evaluating the optical stability of a 0.5-m ultra-lightweight, frit-bonded, fused silica mirror, is extended from the previous 100 deg K specification down to 8 deg K. The thermal stability is excellent and comparable to
Publikováno v:
SPIE Proceedings.
The finite element method was used to study the effect of mount-induced aberrations on the optical surface of a lightweight double arch mirror subjected to cryogenic temperatures. The mount design was controlled by the requirements imposed on the opt
Autor:
Ramsey K. Melugin, William P. Barnes
Publikováno v:
SPIE Proceedings.
The SIRTF optics are intended for operation at 20 K (or less); it will be extremely inconvenient, expensive, and time consuming if it becomes necessary to accomplish all of the optical element testing, assembly, and alignment at comparable temperatur