What is the angle of SMD LED beam?

Narrow Beam SMD LED

Features / Options

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• Choice of colors
• Lead frame / lens casting reliability
• Easy-to-solder leads, gold finish
• Available in tape and reel
• Custom solutions available

Applications / Uses

• Industrial controls
• Medical equipment
• Communications equipment
• Test and measurement
• Security electronics

The viewing angle of LEDs indicates how much the beam of light spreads out from the circuit board. LEDs also have a wide variety of viewing angles available. Standard LEDs have a viewing angle of 60˚, however others may have a narrow beam of 40˚ or less. The LED viewing angle is directly correlated to the epoxy lens that distributes the light. A higher luminous intensity (mcd rating) does not equate to the highest visibility. Light output from an LED chip is very directional. Higher light output is achieved by concentrating light in a tight beam. The higher the mcd rating, the narrower the viewing angle.

Traditional through-hole (non-surface-mount) LEDs are commonly produced with narrow output angles as the LED body is generally moulded around the leadframe using an optical epoxy or silicone. The LED body itself then acts as the lens, focusing the light into beam angles as narrow as 5 degrees, with 30 degrees being a common requirement for many indication and sensing applications. However, with the move to surface-mount components, some design versatility was lost as the LED body is generally injection moulded from non-optical material which is pre-manufactured before the LED die is mounted, and does not therefore form a lens in the same way. As a result, the majority of SMD packages do not incorporate any lensing, emitting light in a wide beam angle which generally exceeds 100°.

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Using a proprietary post die-mount encapsulation process, OMC is able to cost-effectively integrate narrow angle lensing into a range of surface-mount emitters, and can now offer 30 degree beam angles for all standard LED wavelengths, including infrared.

OMC's Commercial Director, William Heath comments: 'Providing a clear human-machine interface is vital, as is ensuring precision and accuracy in a sensing system, and so the selection of the correct light-emitting components is a key design task.  Narrow angle SMD LEDs are very much in demand across a wide spectrum of applications, such as sensing and communications, signalling and indication, but are less commonly available than wide angle devices, particularly for custom wavelengths and CCT/CRIs.  This new series of 30 degree surface-mount LEDs opens up design possibilities for engineers, and in addition to standard devices, we are able to customise the devices to provide the wavelength or other light characteristics the customer may require.'

For additional information, please visit www.omc-uk.com or contact

About OMC:

Founded in the mid-s as The Fibre-Data Group, OMC is one of the longest-established specialist manufacturers of optoelectronics in Europe, headquartered in Cornwall, UK. Accredited to ISO :, ISO : and OHSAS : and winners of the UK National Electronic Component Award for Innovation, OMC is a pioneer in the development, manufacture and application of cutting-edge LED and fibre-optic technologies for a wide range of industries and companies worldwide, and places a major focus on research and development, engineering and innovation. OMC's commitment to the highest standards of quality, performance and engineering support is recognised within the industry. OMC has four key manufacturing divisions: Fibre Optics; LED Backlights and Optical Mouldings; Discrete Optoelectronic Components; and Semiconductor (LED) Lighting.

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