Product category:
Vision and Colour Sensors
News Release from: Firstsight Vision | Subject: CCS UV and IR LEDs
Edited by the Engineeringtalk Editorial
Team on 19 March 2007
IR and UV LEDS ease inspection
Firstsight Vision's UV LEDs are available in 31 different models and have a peak wavelength of 365nm and a light spread of 20 degrees for good intensity, range and uniformity.
Firstsight Vision now offers the new range of UV and IR LED illumination sources from CCS UV and IR lighting provide powerful alternative illumination possibilities for applications where visible light illumination is inadequate
This article was originally published on Engineeringtalk on 1 Mar 2001 at 8.00am (UK)
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Experts from Firstsight Vision can ensure optimum results are obtained using these light sources, by recommending the appropriate optical systems and cameras for use with them.
Most CCD cameras are not very sensitive in the near-ultraviolet region, so for UV applications, it is essential that a suitable camera is selected.
UV filters may be required and it is important to take into account their effects on the overall imaging conditions.
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The IR range is available in 32 models, offering different illumination geometries for different applications.
These include high-density ring lights, power-saving back lights and high-intensity LED arrays.
A choice of two different peak wavelengths of 850nm and 940nm can be selected according to the object to be inspected, since the images taken may be affected by the emission spectrum distribution of the infra-red LED used and the spectral sensitivity characteristic of the CCD camera.
The LED directional characteristic can be selected between 15 degrees for direct light types and 30 degrees for plane emission types as standard models.
The long wavelength of IR light compared to visible light generally results in less surface scattering and greater transmission.
High transmission can make IR ideal for inspecting package fill levels or detecting the presence of foreign matter.
Lower surface scattering means that IR light can provide clear inspection of surface details such as scratches, chips, holes, edges or characters on a wide variety of materials including paper, cloth, plastics and metals, even if they are covered with print or paint.
The UV LEDs are available in 31 different models and have a peak wavelength of 365nm and a light spread of 20 degrees for good intensity, range and uniformity.
The range is characterised by a structure which protects against sparks caused by static electricity.
This prevents illumination failure due to sparks caused by contact with a piece of metal, resulting in significantly improved safety and reliability.
UV light is most commonly used to make materials such as inks or glues fluorescent for identification or bonding integrity inspection.
It also scatters off very small surface features such as scratches more readily than longer wavelengths. Request a free brochure from Firstsight Vision ...
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