focus lamp

focus lamp

[′fō·kəs ‚lamp]
(electricity)
A lamp whose filament has a spiral or zigzag form in order to reduce its size, so that it can be brought into the focus of a lens or mirror.
An arc lamp whose feeding mechanism is designed to hold the arc in a constant position with respect to an optical system that is used to focus its rays.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The smartphone's centrepiece is, of course, the 41MP PureView camera with the latest and massive (for smartphones) 1/1.5" BSI sensor, a six lens assembly courtesy Zeiss, optical image stabilisation (OIS), an LED focus lamp and a Xenon flash.
The smartphone's centrepiece is, of course, the 41MP PureView camera with the latest and masA[degrees] sive (for smartphones) 1/1.5" BSI sensor, a six lens assembly courA[degrees] tesy Zeiss, optical image stabilisaA[degrees] tion (OIS), an LED focus lamp and a Xenon flash.