WATER-COOLED

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WATER-COOLED

WATER-COOLED

Water-cooled LEDs provide a significant increase in output power needed in large test facilities. Water-cooled LEDs are necessary in large wind tunnels and in applications where higher light intensity is needed, like fast PSP. Large test sections require more excitation light because the model is further from the data acquisition system. Water cooling allows the LEDs to be driven harder than the air-cooled systems. Water-cooled LEDs provide ~3 times the output power of their comparable 2-inch air-cooled varieties. Three parts compose the water-cooled LED: the control box, the LED head and the umbilical cable. The control box houses the drive electronics, power supply and water-circulation system. The umbilical supplies the cooling water and the electrical connection between the control box and the LED head. Umbilical cables are available in 10-, 20- and 30-foot lengths. External water is supplied to the control module.


ISSI LEDs Mounted in Cavity Acoustics Fast PSP Test (Left), Courtesy US Air Force Research Laboratory, ISSI Water-Cooled LEDs mounted in a Fast PSP Turret Test (Right), Courtesy of Stanislav Gordeyev, AME Dept, University of Notre Dame

CONTINUOUS 2-INCH WATER-COOLED LED LIGHT SOURCE

Product ID: LM2XX- XXX, DC2XX
The continuous 2-inch, water-cooled LED light source provides uniform, stable illumination, for pressure and temperature sensitive paint measurements. The unit operates continuously or in long-pulse mode, designed for radiometric systems by connecting to the DC2XX driver box (module for radiometric). The operation mode is set sending an external TTL trigger pulse to the DC2XX to set the output pulse width and frequency. The duty cycle may be set from 0% to 100%. The light distribution from the unit is approximatly Gaussian for distance greater than 18-inches [45-cm] from the source. The units are available in 400-nm and 460-nm, however, other wavelenths are available upon request. This unit surpasses the performance of the 2-inch, air-cooled system as it offers a significant increase in power (3-4 times that of the 2-inch, air-cooled system). Maximum input pressure to the control box is 90 psi. An external water source is required to cool the LED module. The control box contains a flow meter and safety circuit to shut off power to the LED if the flow rate is too low or the LED approaches overheat temperatures.

Ordering information: LM2XX-XXX (LED head with umbilical. –XXX denotes wavelength). DC2XX (DC/long-pulse control box and driver with power supply).


  • LM2XX-XXX LED HeadDC2XX Control Box

SPECIFICATIONS

Output power ~14.0 W
Input 248.2A
Stability ~0.1 % per hour after warm-up
Maximum duty cycle 100%
Rise time (10% - 90%) < 600 ns
Fall time (90% - 10%) < 300 ns
Operating temperature range -10°C to 60°C
Wavelength 400-nm and 460-nm (Standard)
FWHM +/- 18-nm
Warranty 12-months
ECCN EAR99

LIFETIME 2-INCH WATER-COOLED LED LIGHT SOURCE

Product ID: LM2XX- XXX, PUL2XX
The lifetime 2-inch, water-cooled LED light source provides uniform, stable illumination for pressure and temperature sensitive paint measurements. The system is overdriven and designed for lifetime acquisition systems by connecting to the PUL2XX driver box (module for lifetime). Because it is overdriven, the duty-cycle is limited to 5%. Operation is controlled by applying a TTL voltage to the external BNC on the PUL2XX module. The maximum pulse width is limited to 1-ms. A governor circuit in the PUL2XX prevents the system from exceeding 5% duty cycle, which could damage the LED. The light distribution from the unit is approximatly Gaussian for distance greater than 18-inches [45-cm] from the source. The units are available in 400-nm and 460-nm packages, however, other wavelenths are available upon request. This unit surpasses the performance of the 2-inch, air-cooled overdriven system as it offers a significant increase in power (~2 times that of an 2-inch, air-cooled overdriven system). Maximum input pressure to the control box is 90 psi. An external water source is required to cool the LED module. The control box contains a flow meter and safety circuit to shut off power to the LED if the flow rate is too low or the LED approaches overheat temperatures.

Ordering information: LM2XX-XXX (LED head with umbilical. –XXX denotes wavelength). PUL2XX (Overdriven control box and driver with power supply).


  • LM2XX-XXX LED HeadPUL2XX Control Box

SPECIFICATIONS

Output power ~1.6-2.4 W @ 5% Duty Factor
Input 4812.5A
Stability ~0.1 % per hour after warm-up
Maximum duty cycle 5%
Rise time (10% - 90%) < 300 ns
Fall time (90% - 10%) < 125 ns
Operating temperature range -10°C to 60°C
Wavelength 400-nm and 460-nm (Standard)
FWHM +/- 18-nm
Warranty 12-months
ECCN EAR99

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