| 摘要 |
An infrared zoom illuminator is contained in a cylindrical housing which may be hand-held. Power is provided to an infrared laser light source from batteries contained in the housing, and a micro lens made of gradient index material is placed between a light exit opening in the housing and the laser light source. Provision is made for selectively interconnecting and disconnecting the light source from the power supply and for changing the distance between the laser light source and the lens. This changes the focus of light exiting from the device from a predetermined maximum divergence, for illuminating a zone, down to the collimated narrow beam of light produced by the laser light source.
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