Multi-lens zoom system and method for flashlights

Details Multi-lens zoom system and method for flashlights Multi-lens zoom system and method for flashlights

2007-02-13

2007-02-13

Tso, Laura K. (Department: 2875)

Illumination

Self powered lamp

With movable focusing element

C362S331000, C362S336000, C359S800000, C359S823000

Reexamination Certificate

active

11127028

ABSTRACT:
An efficient system and method for zooming the light from a flashlight is disclosed. Multiple refractive lenses are translated in unison to allow zooming of the light while reducing the size and weight of the required lenses. In another aspect, a meniscus lens is used to reduce the amount of light lost from a light-emitting diode (LED). One method includes providing a light source in a housing and translating a lens arrangement substantially along a light path of a light beam generated by the light source. The lens arrangement includes at least two refractive lenses separated by a gap, a size of the gap being maintained during translation of the lens arrangement.

REFERENCES:
patent: 5900987 (1999-05-01), Kreitzer
patent: 6515803 (2003-02-01), Hirose
patent: 6741404 (2004-05-01), Ue et al.
patent: 6870689 (2005-03-01), Yoshida

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