From Event: SPIE Optical Engineering + Applications, 2016
In this work we proposed a flat null-screen method to test parabolic trough solar collectors (PTSC). The null-screen testing method measures the slope of the test surface and by a numerical integration procedure the shape of the test surface can be obtained. In this work, we show that the test can be sensitive to small surface deformations, such as those caused by sinusoidal deformations with different amplitudes and spatial periods introduced on the PTSC surface. These calculations also show that the attainable theoretical slope accuracy in the rms sense is about 0.34 mrad. This value was obtained under the assumption that is possible to achieve a 1-pixel resolution on the measurement of the position departures of the centroids of the targets of the null-screen.
Manuel Campos-García, Oliver Huerta-Carranza, José Rufino Díaz-Uribe, Víctor Iván Moreno-Oliva, Agustín Santiago-Alvarado, and Andrés Peña-Conzueloa, "Sensitivity analysis in the test of a parabolic trough solar collector (PTSC) with flat null-screens," Proc. SPIE 9951, Optical System Alignment, Tolerancing, and Verification X, 99510M (Presented at SPIE Optical Engineering + Applications: August 29, 2016; Published: 27 September 2016); https://doi.org/10.1117/12.2238287.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.