| 摘要 |
<p>A portable, self-contained, electrically safe apparatus for producing Ultra-Violet (UV) light comprises a source of electrical power (17), a source of UV light (8) and means (15, 14, 13, 9) to connect the source of UV light to the source of power and convert it to a form suitable to operate the source of UV light. The UV light source may be a miniature UV bulb or light emitting diode (LED) and the power source may be an internal battery. The miniature bulb or LED is preferably of the low voltage (20-30V) type. An external power source may be provided as back up. The apparatus may include an optical system (23, 24) to focus and filter the light output. The apparatus may be in the form of a 'light pen' which fits in a pocket and the clip may serve as the switch. The apparatus may be used for detecting forged banknotes or other documents, etc., identifying stolen goods and for medical or scientific purposes.</p> |
