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Deformable mirror with thermal actuators
Optics Letters, 2002Low-cost adaptive optics is applied in lasers, scientific instrumentation, ultrafast sciences, and ophthalmology. These applications demand that the deformable mirrors used be simple, inexpensive, reliable, and efficient. We report a novel type of ultralow-cost deformable mirror with thermal actuators.
Gleb, Vdovin, Mikhail, Loktev
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SPIE Proceedings, 2006
Beam correction of high power lasers often requires large wavefront deformations with very slow rates of change. Adaptive Optics Associates, Inc. (AOA) has developed a new type of deformable mirror in which thermal expansion of tubes control the mirror's figure. This paper is the subject of a patent disclosure.
Carlos A. Caicedo +5 more
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Beam correction of high power lasers often requires large wavefront deformations with very slow rates of change. Adaptive Optics Associates, Inc. (AOA) has developed a new type of deformable mirror in which thermal expansion of tubes control the mirror's figure. This paper is the subject of a patent disclosure.
Carlos A. Caicedo +5 more
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Thermal conductivity of deformed potassium chloride
Physical Review B, 1989The thermal conductivities of plastically deformed KCl crystals weremeasured in the temperature range 0.02--10 K. The measurements indicatethat thermal phonons are scattered strongly by dislocations. Heat-pulsemeasurements support this interpretation. The thermal conductivity of adeformed KCl sample is restored by ..gamma.. irradiation, suggesting that
, Yang, , Anderson
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Thermally activated deformation. II. Deformation of sintered iron
Journal of Applied Physics, 1974The atomic processes associated with the plastic deformation of commercial-quality sintered iron were investigated. Stress relaxation tests were carried out over the 17–19-kg mm−2 range of initial stress levels at room temperature. The experimental results were analyzed with the deformation kinetics theory discussed in Paper I. The analysis showed that
T. O'D. Hanley, A. S. Krausz, N. Krishna
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Deformation Data from Thermal Marking
Strain, 2003Abstract: A novel experimental technique for strain measurement, named thermal moiré, and based on a combination of thermography and moiré concepts, is presented in this paper. The proposed technique essentially involves the temporary imprinting of a thermal pattern onto the surface of the object of interest as a substitute for conventional gratings ...
M. Heredia Ortiz +2 more
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Thermal deformation of helical gears
SPIE Proceedings, 2010The analytical equation for the thermal field of a helical gear under normal working condition in a stable thermal field is established using mathematical physics, and the thermal deformation of the gear can be computed using this equation. The variations of gear geometric parameters, such as radial dimension, tooth depth, spiral angle, pressure angle,
Yong Zhang, Ye-tai Fei, Shan-lin Liu
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Thermal Deformations of Solid Mirrors
Applied Optics, 1970The tensor equations of elasticity including temperature terms in nonorthogonal coordinates are presented in a form suitable for the method of dynamic relaxation. A nonorthogonal coordinate system that includes a wide class of circular solid mirrors or lenses is described.
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Precision Modular Thermal Deformation Modeling
Heat Transfer, Part B, 2005The thermal response test of payloads in a vacuum chamber, commonly referred to as TVAC, is one of the most widely used performance characterizations of the payload in the aerospace industry. This verification test almost always requires modeling and validation of the performance of the payload under operational and off-design mission scenarios.
Jennifer Batson, Ab Hashemi
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