Lightguide design

Numerous light guides have been fabricated by Eljen Technology to meet a wide variety of light collection applications for scintillators. Light guides are always custom made for each customer's needs. One general rule to remember when considering using light guides: they usually improve the uniformity of light collection but often reduce the average signal amplitude. Light guide types fabricated by Eljen include, but are not limited to, the following general types:

Cast acrylic is also known as PMMA (polymethylmethacrylate) and is often referred to in a generic sense by the many commercial product names under which it is manufactured. Some of these names include: Lucite®, Plexiglas®, Perspex®, and Rohaglas®. It is normally made as cast sheet stock with UV absorbing additives for general purpose commercial applications. When the UV absorbers are omitted to obtain optical transmission into the ultraviolet regions, the product is often referred to as UVT. Sheet stock up to about 6 mm (0.25”) thick are also made by extrusion processes. However, the best optical properties are obtained with the cast material. Acrylic sheets are occasionally used in fabricating tanks for selected liquid scintillators.  In this case, the cast materials provide superior resistance to chemical attack.

Ledlight guides

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ELJEN TECHNOLOGY • 1300 W. Broadway, Sweetwater, TX 79556Email: • Toll Free: (888)-800-8771 • Tel: (325)-235-4276 • Fax: (325)-235-0701

Light guides are fabricated from cast acrylic materials. Cast acrylic generally has good optical clarity, good mechanical properties, and very little natural scintillation response to ionizing radiation.