4-Inch Air-Cooled LEDs

(Product ID: LM4X-DM-XXX)

Where water-cooling is not an option, the choice is 4-inch, air-cooled LEDs. The 4-inch, air-cooled LEDs are utilized in larger wind tunnels or test facilities where a model is relatively far (more than 2 feet). They offer nearly the same power output as the water-cooled LEDs without the need for an external water source. The LED is composed of an LED head with drive electronics and power supply built into the housing.

The continuous 4-inch, air-cooled LED light source provides uniform, stable illumination, for radiometric pressure and temperature sensitive paint measurements. The unit operates continuously or in long-pulse mode, designed for radiometric systems using the continuous/long-pulse driver (module for radiometric). The operation mode is set using an external toggle switch. In long-pulsed mode, the pulse width and frequency are set by sending an external TTL signal to the BNC trigger input. The duty cycle may be set from 0% to 100%.

The light distribution from either system is approximately 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 wavelengths are available upon request. No external cooling source is required. The unit is cooled by two fans built into the package which drive air to the heat sink.