scholarly journals Cryogenic optical performance of a lightweighted mirror assembly for future space astronomical telescopes: correlating optical test results and thermal optical model

2013 ◽  
Author(s):  
Ron Eng ◽  
William R. Arnold ◽  
Markus A. Baker ◽  
Ryan M. Bevan ◽  
Gregory Burdick ◽  
...  
Keyword(s):  
Optical Model ◽  
Test Results ◽  
Optical Performance ◽  
Future Space ◽  
Optical Test

scholarly journals FCI PFM optical test results

2021 ◽  
Author(s):  
Julien Ouaknine ◽  
Catherine Gaudin-Delrieu ◽  
Arnaud Liotard ◽  
Alessandro Boni ◽  
Donny Aminou ◽  
...  
Keyword(s):  
Test Results ◽  
Optical Test

SIRTF-CTA optical performance test results

2003 ◽  
Author(s):  
John P. Schwenker ◽  
Bernhard R. Brandl ◽  
William F. Hoffmann ◽  
Joseph L. Hora ◽  
Amanda K. Mainzer ◽  
...  
Keyword(s):  
Performance Test ◽  
Test Results ◽  
Optical Performance

Ultrasonic Detection of Fiber Orientation in Composite Laminates for Use of Vehicular Structures

2005 ◽  
Vol 297-300 ◽  
pp. 2109-2114
Author(s):  
Je Woong Park ◽  
Kwang Hee Im ◽  
David K. Hsu ◽  
Seung Woo Na ◽  
Young Nam Kim ◽  
...  
Keyword(s):  
Fiber Orientation ◽  
Composite Laminates ◽  
Azimuthal Angle ◽  
Normal Incidence ◽  
Test Results ◽  
Ultrasonic Signals ◽  
Fiber Placement ◽  
Reinforced Plastics ◽  
Vector Decomposition ◽  
Optical Test

The layup of a CFRP (carbon-fiber reinforced plastics) composite laminates affects the properties of the laminate, including stiffness, strength and thermal behavior. It is very important to detect ply error before the laminate is cured for both manual procedure and fiber placement procedure. An ultrasonic technique would be very beneficial, which could be used to test the part after and before curing laminates and requires less time than the optical test. Also cross-polarized scan is very sensitive to the layup errors and ply misorientations. Scanners were set out for different measurement modalities for acquiring ultrasonic signals as a function of in-plane azimuthal angle. Firstly, a manual scanner was built for making transmission measurements using a pair of normal-incidence shear wave transducers to find the effect of fiber misorientations of composite laminates. Also a method for nondestructively determining the ply layup in a composite laminate is presented. The method employs a normal-incidence longitudinal ultrasound to perform C-scan of ply interfaces of the laminate. And a ply-by-ply vector decomposition model has been utilized for evaluating layup errors in composite laminates fabricated from unidirectional plies. Test results between after and before curing laminates with model data were compared for a fiber orientation of the laminates.

Optical test results of fast pnCCDs

2008 ◽  
Author(s):  
Sebastian Ihle ◽  
Robert Hartmann ◽  
Marc Downing ◽  
Lothar Struder ◽  
Sebastian Deiries ◽  
...  
Keyword(s):  
Test Results ◽  
Optical Test

The Involvement of Coloring Agent, Cu, and its Effects on the Optical Performance for Color Glass

2011 ◽  
Vol 328-330 ◽  
pp. 1082-1085
Author(s):  
Xiao Hua Bai ◽  
Xiao Guang Hao ◽  
Shu Jing Li ◽  
Li Ping Dai
Keyword(s):  
Glass Melting ◽  
Color Glass ◽  
Test Results ◽  
Optical Performance ◽  
Glass Material ◽  
Mixed Batch

The paper presents the study by changing of Oxidizability –Reducibility of mixed batch glass material and changing the quantities of Coloring agent, Cu, in glass melting. The analysis of Spectrum Transmittance and Chroma Index have been carried out on the different sample plates obtained in the glass melting. The test results indicate: The wavelength T≥52.73% shown by the transmittance of light for the glass in the following conditions: a) When the value of COD of mixed batch glass material was equal to 473.06( i.e. the quantity amount of CuO in percentage is 0.3%) . b) When a= 0.596 and b=6.560 was shown in the Chroma Index of glass. The wavelength T = 10.33% at lowest shown by the transmittance of light for the glass in the following conditions: a) When the value of COD of mixed batch glass material was equal to 160.23( i.e. the quantity amount of CuO in percentage is 0.3% as well) b) When a= - 18.039 and b= - 9.178 was shown in the Chroma Index of glass.

A Nonimaging Receiver for Parabolic Trough Concentrating Collectors

Solar Energy ◽  
2002 ◽  
Author(s):  
Randy Gee ◽  
Gilbert Cohen ◽  
Roland Winston
Keyword(s):  
Thermal Energy ◽  
High Performance ◽  
Optical Model ◽  
Energy Output ◽  
Optical Performance ◽  
Parabolic Trough ◽  
Optical Efficiency ◽  
Indirect Benefits ◽  
Reduce Heat Loss ◽  
Insight Into

The design of a nonimaging secondary reflector as part of a parabolic trough receiver has been developed and evaluated. A detailed optical model was used for evaluation, which offered insight into the optical performance of the secondary and showed that the design offers about a 1% net increase in optical efficiency. In addition, the secondary was estimated to reduce heat loss from a high-performance evacuated receiver by about 4%. Overall, the net performance advantage of the secondary reflector is calculated to be 1.4%, that is, the entire trough collector field would have a 1.4% greater annual thermal energy output. This performance increase is small, but the non-imaging secondary also achieves other indirect benefits such as better flux uniformity around the absorber tube, and increased tolerance of parabolic trough collectors to optical errors.

Optical performance analysis and test results of the EUCLID near-infrared spectro-photometer

2016 ◽  
Author(s):  
C. Gal ◽  
H. Thiele ◽  
E. Gubbini ◽  
A. Mecsaci ◽  
A. Kuisl ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Near Infrared ◽  
Test Results ◽  
Optical Performance
Sign in / Sign up

Export Citation Format

Share Document