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Precision UV LED Curing System
The COOLLED Precision UV LED Curing System is a desk top instrument that is primarily designed to replace existing UV Curing systems. It generates a flood of high intensity, single peak wavelength of UV light for the curing of inks, coatings and adhesives.
The
light source is a high density array of semiconductor light emitting diodes
/ LED / LED's that are die and wire bonded to a custom substrate. The
method of assembly uses a unique patent pending technique to create a
high yet linear spread intensity of irradiation. This instrument has been
developed primarily to demonstrate the features and benefits of generating
UV light from LED's rather than from conventional bulb technology and
in the near future COOLLED will be launching a new large area array for
the ink jet market and other applications. The precision system will also
be modified in future generations to emit light of wavelengths other than
UV such as Infra Red / IR all using LED technology.
The LED array is built into a remote housing connected to the main instrument via a umbilical flexible housing. This housing supplies all necessary power, cooling and temperature sensing. The main instrument houses the water cooling heat exchanger and pump system, the necessary power supplies and a microprocessor board with display for control of the LED intensity and switch on/switch off times.
APPLICATIONS
This versatile instrument provides a precision method of initiating a photo-chemical reaction, not possible with bulb technology. The LED's can be switched on/off instantaneously with zero warm up required and unlike bulb technology the life of the LED's is rated at >10,000 hours of on time. Also as the light intensity of the LED's are controlled precisely the degredation is known and therefore unlike conventional systems, no light meter is required to monitor the LED output.
The light source can be positioned close to the target substrate without any danger of heat damage due to IR / Infra red as this system emits light of a single wavelength with zero IR present. Another added benefit of this system is that a uniform intensity of irradiation is produced over the full area of the array which ensures an even cure across the total area.
The instrument can be programmed for either a single power level or a variable cure program. Short pulses can also be produced to simulate parts / substrates moving under the LED head as would be seen on a conveyor type system.
FUNCTIONS
- Array size 20mm x 10mm or 40mm x 10mm
- Manual mode Power setting 0-100% in 1% steps Manual switch on/off
- Program mode Power setting 0-100% in 1% steps Time setting 0.01sec - 999sec "on" times 5 program capability
TECHNICAL DATA
- Spectral Output 385-405nm
- Peak wavelength 395nm
- Typical output 1.2W/cm2
- Power requirements 110-240V ac 50-60Hz
SAFETY
The safety standard which covers radiation emissions from LED's is IEC/EN60825-1(2001). As it is possible to have this array powered up continuously, the level of UV radiation output from this instrument makes it a Class 3B Product with the following warning
Users should ensure that the array is fixed within a suitable housing to prevent exposure to the light source at all times with all necessary interlocks.
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