Two quality control tests determine reflectivity and curvature faults of concave solar mirrors. Curvature defects in solar mirrors are easily revealed by photographing mirror surface. Calibrated aperture placed in front of camera lens admits rays reflecting only from acceptable areas of mirror, blocking out diverging rays reflected from defective areas. Defects can pinpoint problems that may exist in production. Same photograph can be obtained using calibrated disk instead of aperture, except that, this time, only defective areas would be exposed.
Detecting surface faults on solar mirrors
NASA Tech Briefs ; 5 , 2
01.09.1980
Sonstige
Keine Angabe
Englisch
NTRS | 1984
|NTRS | 1982
|Detecting Faults In High-Voltage Transformers
NTRS | 1988
|