DE10305448B4 - Optical device for light coupling into a light guide cable - Google Patents

Abstract

optical Device for illuminating the coupling surface of a light guide cable, characterized in that narrowing in a hollow body (3) Cross-section reflective and / or refractive optical elements are arranged, wherein at the larger end face of the hollow body a plane Spotlight (1) and on the smaller surface of the hollow body a Recording device (2) for fixing a coupling surface of a light guide cable is arranged and the areal Spotlight consists of a LED array.

Description

The The invention relates to an optical device for light coupling in a fiber optic cable.

in the The prior art are optical devices for the illumination of Optical fiber bundles known. Such fiber bundles allow the illumination of poorly accessible objects.

at The known devices are used as light sources exclusively cold light sources or high power thermal light sources. These light sources are characterized by a high radiant power and a continuous Spectrum.

adversely Here is a high electrical power requirement for the operation of Lamps and an extremely high thermal load of the environment in the immediate vicinity of the lamp. In the generation of this radiation temperatures above 1000 ° C occur inside the lamp. The Lamphouses of cold light sources or high power thermal light sources are therefore subjected to high thermal stress and must be mechanical very stable be. The high operating temperatures make cold light sources or High-power thermal light sources very sensitive to vibration. movements while of the operation are only with special kinematic arrangements possible. Due to the high thermal load have cold light sources and high power thermal light sources only a short life. Their use is very costly.

To DE 30 10 347 A1 a device for connecting optical fibers by means of an imaging optical element is known, in which a refractive optical element is provided in a hollow body, which concentrates the light of a flat radiator so far that it can be coupled into a Lichtleitphase.

Furthermore, in EP 0 568 190 B1 an optical coupling element known in which a conical hollow body is used, whose walls are formed inside highly reflective.

Of the Invention is based on the object, a device of the above specify the type mentioned, which ensures a long life and cost-effective can be manufactured and operated.

According to the invention Task solved with a device which the claim 1 features specified.

advantageous Embodiments are specified in the subclaims.

The optical device concentrates the emitted from an LED array Light on the coupling surface a fiber optic cable. The deflection of the light is predominantly by reflecting and refractive optical components.

• 1. Durch die Verwendung von LED-Arrays kann die Anordnung sehr kompakt und mechanisch sehr robust aufgeführt werden.
• 2. Die Beleuchtung kann hochfrequent moduliert werden.
• 3. Die bei Kaltlichtquellen und thermischen Hochleistungslichtquellen erforderliche aufwendige Kühlung entfällt, da die LEDs nicht aktiv gekühlt werden müssen und lediglich eine passive Kühlung mit Kühlkörpern benötigen.
• 4. Mit Kaltlichtquellen und thermische Hochleistungslichtquellen werden nur Lebensdauerwerte von weniger als 1000 Gebrauchsstunden erreicht. Die erfindungsgemäß verwendeten LED-Beleuchtungen erreichen eine etwa hundertfach längere Lebensdauer.
• 5. Die Lebensdauer von Kaltlichtquellen und thermischen Hochleistungslichtquellen wird nur erreicht, wenn sie erschütterungsfrei aufgestellt sind. Demgegenüber sind LEDs mechanisch sehr robust und können auch bewegt werden, wenn sie leuchten.
• 6. Die hohe Lichtintensivität von Kaltlichtquellen und thermische Hochleistungslichtquellen bedingen einen hohen Energieverbrauch. Wird einfarbiges Licht genötigt, werden Filter vorgeschaltet, die einen Großteil der Lichtenergie in Wärme umsetzen, während LEDs das Licht in den gewünschten Farben emittieren.

The invention is characterized by a number of advantages. These include in particular:

• 1. Through the use of LED arrays, the arrangement can be listed very compact and mechanically very robust.
• 2. The lighting can be modulated at high frequency.
• 3. Complex cooling required for cold light sources and high-power thermal light sources is eliminated since the LEDs do not need to be actively cooled and only require passive cooling with heat sinks.
• 4. Cold light sources and high intensity thermal light sources only achieve lifetime values of less than 1000 hours of use. The LED lights used in the invention achieve about a hundred times longer life.
• 5. The service life of cold light sources and high-power thermal light sources is only achieved if they are installed vibration-free. In contrast, LEDs are mechanically very robust and can also be moved when they light up.
• 6. The high light intensity of cold light sources and thermal high-power light sources require high energy consumption. When monochrome light is required, filters are placed in front of them, which convert a large part of the light energy into heat, while LEDs emit the light in the desired colors.

The invention will be explained in more detail below with reference to an embodiment. In the accompanying drawing shows 1 a perspective view of an embodiment.

The arrangement is in the present embodiment with a hollow body 3 provided, which is formed in the shape of a truncated cone. The connection surface for the areal radiator designed as an LED array 1 is located on the large-scale end face of the hollow body 3 , At the smaller end face of the hollow body is an opening which forms the Einkoppelstelle for a light guide cable. The Einkoppelstelle consists of a recording device 2 with which the coupling surface of the optical fiber bundle is fixed. The concentration of light takes place inside the hollow body 3 with the aid of reflective optical elements mounted on the inside and with a Fresnel lens which is arranged in the vicinity of the planar radiator.

1

flat radiator

2

recording device for optical cables

3

hollow body

Claims (5)

Optical device for illuminating the coupling surface of a light guide cable, characterized in that in a hollow body ( 3 ) are arranged with narrowing cross-section reflective and / or refractive optical elements, wherein at the larger end face of the hollow body, a flat radiator ( 1 ) and on the smaller surface of the hollow body a receiving device ( 2 ) is arranged for fixing a coupling surface of a light guide cable and the flat radiator consists of an LED array. Optical device according to claim 1, characterized in that on the inside of the lateral surface of the hollow body ( 3 ) reflective elements are arranged. Optical device according to claim 1 or 2, characterized in that in the interior of the hollow body ( 3 ) in the vicinity of the planar radiator ( 1 ) is arranged a collecting optical element. Optical device according to claim 3, characterized in that in that the collecting optical element is designed as a Fresnel lens is. Optical device according to one of the preceding claims, characterized in that the hollow body ( 3 ) has the shape of a truncated cone.