beam spread

beam spread

[′bēm ‚spred]
(engineering)
The angle of divergence from the central axis of an electromagnetic or acoustic beam as it travels through a material.

beam spread

The angle between two directions (on opposite sides of the axis of a light beam, and in the same plane as the beam axis) in which the light intensity equals a stated percent of a maximum reference intensity.
References in periodicals archive ?
This 70 watt LED tank cleaning light provides 6,000 lumens of high quality light and is available in an optional 360 or 180 beam spread.
Two offset LED assemblies within the fixture allow this lamp to provide a 100-degree horizontal beam spread and 140-degree vertical beam spread.
The four lumen packages, which will provide enough punch at mounting heights from 9 feet to 18 feet-plus, coupled with color temperature and numerous beam spread options makes this an ideal track lighting option for a whole host of various supermarket applications.
The floodlights provide a Nema 6 x 7 beam spread for broad light distribution.
T HE FRONT grille features Chevy's famous ' bow- tie' theme; the front lights are big clearlens projection units with an excellent beam spread, though high- intensity discharge ( HID) lamps are missing in action, though the feature that is now standard in this segment.
Designers also have the ability to automatically optimize the optical system to match a specified beam spread.
The challenge, in part, has been to find a lamp safe for the objects, and one that provides a smooth beam spread in a range of beam sizes for small 3-D objects up to very large paintings, with balanced, accurate broad-spectrum light.
As the transmitter uses a high frequency light source, the problems associated with ultrasonic and radar transmitters, such as false echo's caused by beam spread, are eliminated.
Mr Maes said that while there is no international standard for types and styles of LED lights being designed, ADB's new lights will, of course, conform to all ICAO's existing requirements for light intensity, density and beam spread.
The report describes the techniques that the researchers used in their review, including the pulse-echo technique, pitch-catch technique, decibel scale, piezoelectric effect (electric polarity due to pressure), beam diffraction, beam absorption, beam spread (or divergence), beam centerline location, and distance amplitude correction.
Use low-voltage downlights with narrow beam spread to add drama and to highlight wall-hung art or objects on a counter surface,