초록 ▼

A laser flashlight employs a laser emitter disposed within a housing for emitting a coherent light along an optical axis toward the light emitting end of the housing. A power supply selectively applies electricity from a battery pack disposed within the housing to the laser emitter. An optical syste

A laser flashlight employs a laser emitter disposed within a housing for emitting a coherent light along an optical axis toward the light emitting end of the housing. A power supply selectively applies electricity from a battery pack disposed within the housing to the laser emitter. An optical system disposed within the housing intermediate the laser emitter and the light emitting end of the housing includes a laser element pumped by the laser emitter, a frequency/wavelength converter, and a resonator, to form the coherent light into a laser beam. A beam expander receives the laser beam, disperses the laser beam, and transmits the dispersed laser beam from the light emitting end of the housing into the ambient environment. The dispersion of the laser beam is such that the laser beam is safe for the human eye at the light emitting end of the housing.

대표청구항 ▼

[ What is claimed is:] [1.] A hand-held laser flashlight for emitting an eyesafe light dispersion pattern into an ambient environment comprising:a housing having first and second ends;a first laser emitter disposed within the housing for emitting a first coherent light beam toward the first end of t

[ What is claimed is:] [1.] A hand-held laser flashlight for emitting an eyesafe light dispersion pattern into an ambient environment comprising:a housing having first and second ends;a first laser emitter disposed within the housing for emitting a first coherent light beam toward the first end of the housing along an optical axis;a power controller powered by at least one battery for selectively applying an electrical input to the first laser emitter;an optical system disposed within the housing along the optical axis intermediate the first laser emitter and the first end of the housing and responsive to the coherent light beam for generating a laser beam for projection along the optical axis, the optical system including a resonator having an optical element comprising an optically transmissive material for propagating laser energy along the optical axis and a converter, the optical element receiving the first coherent light beam emitted by the diode and emitting a first laser beam having a first wavelength, the converter receiving the first laser beam from the optical element, converting the first wavelength to a second wavelength, respectively, and emitting a second laser beam having the second wavelength toward the first end of the housing, the optical element having a substantially flat end surface facing the first laser emitter, the converter having a convex end surface facing the first end of the housing, the end surface of the optical element and the convex end surface of the converter defining the resonator; anda light transmissive beam expander disposed at the first end of the housing along the optical axis, the beam expander having oppositely disposed input and output optical surfaces, the laser beam impinging the input surface at a first beam diameter and exiting the exit surface at a second beam diameter, the laser beam exiting the exit surface having an intensity which may not be greater than 26 mW/cm.sup.2.