Telecentric lighting system for optical or opto-electronic recording channel

The telecentric lighting system comprises a light source, a tube and an optic. The light source is formed as an Ulbricht cone with a distributive and less selective inner coating, with at least one LED (2) for coupling in the light energy. The LED's have a flat-ground and matted outlet aperture...

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Bibliographische Detailangaben
Hauptverfasser:	BEHR, LOTHAR, 07745 JENA, DE, KUEHM, MATTHIAS, 07747 JENA, DE
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	The telecentric lighting system comprises a light source, a tube and an optic. The light source is formed as an Ulbricht cone with a distributive and less selective inner coating, with at least one LED (2) for coupling in the light energy. The LED's have a flat-ground and matted outlet aperture for achievement of a large opening angle.The optic has an aspherical Fresnel lens (7), whereby the focal point lies in the outlet diaphragm of the Ulbricht cone. The Ulbricht cone is formed as a half cone (1). The number of LED's is a multiple of four and they are arranged on at least one circular track, being randomly distributed.