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The New LOTIS Test FacilityThe Large Optical Test and Integration Site (LOTIS) at the Lockheed Martin Space Systems Company in Sunnyvale, CA is designed for the verification and testing of optical systems. The facility consists of an 88 foot temperature stabilized vacuum chamber that also functions as a class 10k vertical flow cleanroom. Many problems were encountered in the design and construction phases. The industry capability to build large chambers is very weak. Through many delays and extra engineering efforts, the final product is very good. With 11 Thermal Conditioning Units and precision RTD s, temperature is uniform and stable within 1oF, providing an ideal environment for precision optical testing. Within this chamber and atop an advanced micro-g vibration-isolation bench is the 6.5 meter diameter LOTIS Collimator and Scene Generator, LOTIS alignment and support equipment. The optical payloads are also placed on the vibration bench in the chamber for testing. This optical system is designed to operate in both air and vacuum, providing test imagery in an adaptable suite of visible/near infrared (VNIR) and midwave infrared (MWIR) point sources, and combined bandwidth visible-through-MWIR point sources, for testing of large aperture optical payloads. The heart of the system is the LOTIS Collimator, a 6.5m f/15 telescope, which projects scenes with wavefront errors <85 nm rms out to a 0.75 mrad field of view (FOV). Using field lenses, performance can be extended to a maximum field of view of 3.2 mrad. The LOTIS Collimator incorporates an extensive integrated wavefront sensing and control system to verify the performance of the system.
Document ID
20090015877
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Bell, R. M.
(Lockheed Martin Space Systems Co. United States)
Cuzner, G.
(Lockheed Martin Space Systems Co. United States)
Eugeni, C.
(Lockheed Martin Space Systems Co. United States)
Hutchison, S. B.
(Lockheed Martin Space Systems Co. United States)
Merrick, A. J.
(Lockheed Martin Space Systems Co. United States)
Robins, G. C.
(Lockheed Martin Space Systems Co. United States)
Bailey, S. H.
(Arizona Univ. Tucson, AZ, United States)
Ceurden, B.
(Arizona Univ. Tucson, AZ, United States)
Hagen, J.
(Arizona Univ. Tucson, AZ, United States)
Kenagy, K.
(Arizona Univ. Tucson, AZ, United States)
Martin, H. M.
(Arizona Univ. Tucson, AZ, United States)
Tuell, M.
(Arizona Univ. Tucson, AZ, United States)
Ward, M.
(Arizona Univ. Tucson, AZ, United States)
West, S. C.
(Arizona Univ. Tucson, AZ, United States)
Date Acquired
August 24, 2013
Publication Date
September 22, 2008
Publication Information
Publication: 25th Space Simulation Conference. Environmental Testing: The Earth-Space Connection
Subject Category
Optics
Distribution Limits
Public
Copyright
Public Use Permitted.

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