The ALS3 power supply has been developed to ignite, power and modulate Cermax Xenon Lamps from a single source. These lamps provide an intense, collimated light beam of uniform intensity which can be modulated over a wide range of frequencies. The system is made up of a power supply, lamp igniter, modulator, lamp & lamp holder.
These power supplies can operate off line voltages between 100VAC to 240VAC and are capable of operating Cermax short-arc lamps of 300, 400, 500 and 1000 Watts.
An optical shroud can be added for focusing the beam and providing circular or rectangular beam cross sections.
This light system uses Cermax high-intensity arc lamps. They are rugged and compact xenon short-arc lamps with fixed internal reflectors. They are based on patented technology and the name “Cermax” is a registered trademark of Excelitas Technologies.
Their primary distinguishing characteristics are focused output, extremely high brightness, and safe operation. Cermax Xenon lamps also provide broadband and stable output spectra. Their high brightness makes them ideal for applications such as flow visualization, video projection systems and analytical instruments. Except for some specialized low-wattage high-pressure mercury lamps, Cermax Xenon lamps provide greater brightness levels than any other commercially available incoherent light source and in some cases, replace lasers. The mechanical integrity of Cermax lamps far exceeds that of any other type of short-arc lamp.
As a Xenon lamp ballast, the power supply first ignites the lamp with a high voltage pulse and, once the lamp is ignited, acts as a programmable current source delivering constant current based on the input program signal from the built-in modulator circuit.
The display is 2 lines x 16 characters wide that displays two different color backgrounds to indicate whether the light is continuously on or being modulated. It is easy to work with, not only in viewing the lamp status but in setting the modulation timing as well.
The four momentary buttons allow for easily setting of the lamp's frequency. The top and bottom buttons are used to set the lamp mode as well as the “On and Off” time durations of the lamp. The left and right buttons move the cursor from field to field on the display.
The lamp enable switch on the front control panel and the "On/OFF" switch on the back are used to turn on the power supply and ignite the lamp. All lamp connections from the power supply are color coated and/or keyed to prevent improper lamp connections.
The SAI™ Optical Shroud is designed expressly to mount with the Cermax lamp holders. The Cermax lamp is housed frame that mounts to the shroud. The optical shroud contains three basic elements the condensing lens, the aperture cradle and the projection lens assembly.
The condensing lens serves to redistribute the light emitted by the lamp more uniformly and the apertures, to change the cross-section shape and size of the beam. The third element, the projection lens assembly, focuses an image of the aperture at the desired distance from the system. The lamp holder is mounted inside a rectangular Light Shield to minimize any stray light from the holder. A handle is provided on top of the Light Shield to carry and reposition the shroud. The base has bumper feet for general support on any flat surface and two threaded mounting holes to affix the light to a tripod or surface plate.
An adjustable slit and an iris aperture are included with the Optical Shroud. The adjustable slit provides a rectangular beam or "slab" of light varying in width. This is particularly helpful to visualize 2-D airflows or to study 2-D cross sections of a complex 3-D airflow. The iris aperture provides a round beam varying in diameter. This is useful for examination of axisymmetric airflows or the overall examination of any airflow.
To change the width of the slit in the slit aperture, just loosen the four screws that hold the two leaves in place and reset as desired. The orientation of the slit may also be adjusted by the rotation of the aperture in its cradle.
To adjust the beam diameter of the Iris, simply move the iris handle.