UV adjustable optical attenuator

An optical element includes a light absorbing medium formed of a transparent material and light absorbing elements encapsulated within the transparent material. The light absorbing elements have an ultraviolet (UV) light-dependent absorption characteristic and UV light is applied to the light absorb...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	WONG TOM SHEAU TUNG, KOH JUAY SIM, FLENS FRANK, VAN HAASTEREN ARJAN
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COLORIMETRY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING LIGHTING MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING MECHANICAL ENGINEERING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS RADIATION PYROMETRY STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING WEAPONS
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Beschreibung
Zusammenfassung:	An optical element includes a light absorbing medium formed of a transparent material and light absorbing elements encapsulated within the transparent material. The light absorbing elements have an ultraviolet (UV) light-dependent absorption characteristic and UV light is applied to the light absorbing medium to change the attenuation of the light absorbing medium to a desired attenuation. UV light is applied to the light absorbing medium in a controlled manner to change the attenuation of the light absorbing medium from an initial attenuation to the desired attenuation. The application of UV light to the light absorbing medium can cause the light absorbing elements encapsulated within the light absorbing medium to degrade such that the amount of light absorbed by the light absorbing medium is reduced. Reducing the amount of light that is absorbed effectively reduces the attenuation of the light absorbing medium.