Topic
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.
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Patent•
20 Feb 2001
TL;DR: In this article, an illuminating apparatus includes a plurality of light members spaced apart from each other and operable so as to produce forwardly directed parallel light rays, a parabolic reflector disposed in front of the light members, and an integrator unit.
Abstract: An illuminating apparatus includes a plurality of light members spaced apart from each other and operable so as to produce forwardly directed parallel light rays, a parabolic reflector disposed in front of the light members for receiving the forwardly directed parallel light rays from the light members, and an integrator unit. The parabolic reflector has a reflecting surface that confronts the light members. The integrator unit has an input side to receive the light rays reflected by the reflecting surface of the parabolic reflector.
37 citations
Patent•
24 Jul 2009
TL;DR: In this paper, a lens arrangement with an achromatic homogenizer and collimator for multiple LEDs is presented, which combines the hemispherical emittance profiles from one or more LEDS into a collimated beam without chromatic aberration.
Abstract: A lens arrangement with an achromatic homogenizer and collimator for multiple LEDs. The lens arrangement combines the hemispherical emittance profiles from one or more LEDS into a collimated beam without chromatic aberration. The lens arrangement has one or more LEDs, a homogenizer, a solid lightpipe, an internal parabolic reflector, a retroreflector, and a refractor. The emittance profiles of the LEDs are distributed evenly over space and angle by multiple reflections inside a diffusely reflecting cavity of the homogenizer. The internal reflector has a numerical aperture of 1.0, which defines a hemispherical solid angle of collection within air. The retroreflector directs rays away from the LEDs. The retroreflection permits space for the electronics of high radiance LEDs. The refractor converts the retroreflector rays in a plurality of shapes. The lens is optimally designed for applications with high standards for color mixing, uniformity, and efficient conversion of electrical power into light.
37 citations
Patent•
23 Apr 1998
TL;DR: In this article, a rotating polygonal mirror wheel is arranged in the focal point of a parabolic mirror onto which the radiation beam from the laser (3, 4) is directed by telecentric optics which guides the transmitter and receiver beam on the same optical axis.
Abstract: A sensor unit (50), a process and a device are disclosed for inspecting the surface (10', 10'') of an object (10) for determining its surface characteristics, such as structural disturbances. The device has a transmitter module (51) which emits at least one radiation beam (6, 6', 6'') and a receiver module (52) with at least one photo-receiver (15, 16, 20). A rotating polygonal mirror wheel (2) is arranged in the focal point of a parabolic mirror (1) onto which the radiation beam (6) from the laser (3, 4) is directed by telecentric optics which guide the transmitter and receiver beam on the same optical axis. The parabolic mirror (1) guides the deflected radiation beam (6, 6', 6'') over the object (10) at a constant angle relative to the axis of symmetry (7) of the parabolic mirror (1), along a scanning line (23, 24). The reflected radiation beam falls onto the processing unit (5) after being reflected out of the common radiation path.
36 citations
Patent•
19 Feb 2004
TL;DR: In this article, an extracorporeal shock wave system provides a planar wave for the treatment of tissue, and a parabolic reflector is provided in order to propagate the wave through a membrane and to the tissue of a human subject.
Abstract: An extracorporeal shock wave system provides a planar wave for the treatment of tissue. A parabolic reflector is provided in order to propagate the planar wave through a membrane and to the tissue of a human subject. A piezoelectric, electrohydraulic or electromagnetic source may be used to develop the wave.
36 citations
Patent•
14 Sep 1982
TL;DR: In this article, an optical transmission element is arranged with its optical axis OA coaxial to the axis of rotation and light transmitters in different radial regions for the transmission of a plurality of light channels between two parts which rotate relative to each other.
Abstract: For the transmission of a plurality of light channels between two parts which rotate relative to each other, an optical transmission element is arranged with its optical axis OA coaxial to the axis of rotation and light transmitters in different radial regions. By convex lenses or mirrors the bundles of rays coming from the light transmitters are parallelized and impinge on the optical transmission element which individually focuses the bundles of rays. In order to obtain an imaging scale of 1:1 a synchronously rotating rhomboid prism or a parabolic mirror can be used. In addition, HF channels can be transmitted.
36 citations