| sage action, inc. | ||||||||
| Airflow Visualization and Measurement | ||||||||
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SAI™ MODULATED ARC LAMP The SAI™ Modulated Arc Lamp has been developed as part of a system for both visualization and measurement of complex airflows with small, neutrally-buoyant soap bubbles. In particular, it provides an intense, collimated light beam of uniform intensity which can be modulated over a wide range of frequencies. This allows the motion of the bubbles to be determined from speeds as low as 2 fps to speeds as high as 200 fps or more. For different flow situations, the beam can be readily modified to optimize the lighting. The light system consists of an optical shroud and a switcher power supply. |
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THE SAI™ OPTICAL SHROUD |
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The principal component of the Modulated Arc Lamp is the SAI™ Optical Shroud. Our current Model OS 300-3 is designed expressly for use with the PE300 Watt Cermax Lamp manufactured by PerkinElmer Optoelectronics. This unique unit is a xenon-filled, short-arc lamp containing an integral reflector. The Cermax Lamp is housed in the PerkinElmer HX2 Frame and powered by the PerkinElmer PS300-13 Laboratory Power Supply. |
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The Optical Shroud, itself, contains three basic elements: (i) A condensing lens, (ii) a special aperture cradle and (iii) a projection lens assembly. The condensing lens serves to redistribute the light emitted by the Lamp more uniformly and a special Aperture, 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. A handle on the Aperture extends outside the Optical Shroud for insertion, removal and adjustment.
The Lamp Holder is mounted inside a rectangular Light Shield to eliminate any stray light coming from the Holder. A Handle is provided on top of the Light Shield to carry and reposition the Optical Shroud. Also, the Light Shield Base has bumper feet for general support on any flat surface. |
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THE SWITCHER POWER SUPPLY |
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The Model PS300-13 Laboratory Power Supply is a new switcher design by PerkinElmer Optoelectronics. To measure velocities, it is necessary to precisely modulate the light output. The new PS300-13 is a user programmable lamp power source. There are three membrane switches on the front panel labeled "MENU", "A" and "B". These switches permit selection of four operating modes: Continuous Current Supply Mode, Variable Time Mode, Internal Modulation Mode and External Modulation Mode. The four modes and their functions are monitored from the front panel by means of a LCD Display. The Display is 4 Lines x 20 Characters wide with blue background and white text. This is very convenient to work with, not only for the status and data it provides, but also the directions for operation. |
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Output current to the Lamp is supplied by two Multi-Contact Powerline Series connections on the front panel, and power to the fan and lamp interlock on the lamp frame, by a 4 pin socket connector. Although not used at present, there is a 9 pin D-subminiature connector for remote input and two 2mm sockets for external modulation input. Altogether, the new PS300-13 offers a great replacement to the PS300-1 with a VMC-2. It is extremely compact and light, being a small fraction of the size and weight of the ILC PS300-1. Sage Action, Inc. has worked cooperatively for many months on this effort with PerkinElmer and we believe our Customers will find the new SAI™ Modulated Arc Lamp with the new PE Power Supply really “user friendly”. This, in turn, enhances the application of our MAL for non-invasive velocity measurements of the instantaneous flow field along the “natural” streamlines. |
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INDIVIDUAL SPECIFICATIONS -
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| © 2010 SAGE ACTION, Inc. All Rights Reserved. SAI is a trademark of SAGE ACTION, Inc. |
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| Email: info@sageaction.com | Phone: 607.844.8448 | Fax: 607.844.9399 |
