Parabolic reflector

About: Parabolic reflector is a research topic. Over the lifetime, 3375 publications have been published within this topic receiving 30735 citations. The topic is also known as: paraboloid reflector & paraboloidal reflector.

Mid-infrared spectroscopy-based trace gas detection method and device combining long-optical-path open light path with wavelength modulation technique

Abstract: The invention discloses mid-infrared spectroscopy-based trace gas detection method and device combining a long-optical-path open light path with a wavelength modulation technique. The detection device mainly consists of a continuous wave quantum cascade laser (CW-QCL), a laser driving and controlling unit, a plane mirror, a beam splitter, a visible laser, a reference gas pool, mercury, tellurium and cadmium (MCT) detector, an off-axis parabolic mirror, a corner reflector, a digital lock-in-amplifier and a computer. By using the CW-QCL as a light source, long-optical-path open light path is combined with the wavelength modulation technique to detect multi-component trace gas with high sensitivity.

Solar concentrators, method of manufacturing and uses thereof

Abstract: A solar concentrator comprising at least one rigid parabolic self-supporting solar collector comprising at least one parabolic reflector and at least one heat collector rigidly supported above a reflective surface of the parabolic reflector; and a positioning unit configured for positioning the solar collector into an operation position for reception of solar beams by the parabolic reflector, and into a rest position in which the reflective surface of said parabolic reflector and the heat collector are at least partly under cover of a back surface of the parabolic reflector.

Parabolic Mirror and Air-Coupled Transducer for Multimodal Plate Wave Detection

Abstract: A conventional contact piezoelectric transducer, excited by a broadband burst (chirp) that covers its whole frequency bandwidth, is used as a transmitter to simultaneously generate several Lamb waves in a plate Throughout the propagation, these modes leak energy into the ambient air, producing bulk waves in many directions The association of a parabolic mirror and an air‐coupled transducer (PMAT) allows these waves to be received in air with a large angular aperture By displacing the PMAT in a direction parallel to the plate, but without changing its orientation like when standard air‐coupled receivers are used, a series of temporal waveforms are captured Signal processing then allows the phase velocity of the several Lamb waves to be measured in large wave number and frequency domains These resulting data are used to identify the moduli of elasticity for composite plates made of long glass fibers and polymer matrix

High intensity illumination light table

Abstract: A stereo viewing system including a stereomicroscope, a film advance system and a high intensity illumination light table. The stereomicroscope includes rhomboid arms for positioning the optics over the film to be viewed. The light table includes a light transmitting cover, and a pair of intersecting reflectors, a pair of lamp assemblies and a diffuser, all combined to produce a diffused pair of intersecting annular rings of illumination. Each reflector is a section of a surface of revolution, preferably a section of a paraboloid. The lamp assemblies are mounted relative to the reflectors so that the filament of each lamp is, at least nominally, at the focal point of each parabolic reflector. The diffuser is, preferably, a pair of cylindrical shaped elements each of which is located between a lamp and its respective reflector and surrounds each lamp. The light table also includes a pair of mechanical dimmers and a cooling system.