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US 7,599,135 B2Granted
Handheld magnifying device incorporating a circular array of light emitting diodes
OwnerDuan Fenginventor
Life of this patent
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Abstract
An LED-assisted magnifying device having a generally circularly-shaped array of LEDs adapted to provide a uniform pattern of visible illumination below a magnifying lens. An ultraviolet LED is provided as an alternate, optional light source to the generally circularly-shaped array of LEDs. A darkfield illuminator may be advantageously employed with the LED-assisted magnifying device when gemstones are being inspected.
Claims5
An article of manufacture comprising:
- a housing;
- a magnifying lens assembly mounted in said housing;
- a generally circularly-shaped array of a plurality of LEDs adapted to produce a uniform pattern of illuminating radiation below said magnifying lens assembly;
- a power source adapted to provide power to said circularly-shaped array of LEDs;
- a power switch adapted to connect said power source to said circularly-shaped array of LEDs;
- and,
- a darkfield illuminator having a source of darkfield illumination comprising LED light reflected at oblique angles and azimuths inside an open compartment sized to accept gemstones.
4 more elements
Dependencies are inferred from the claim text.