Product Development

Following extensive computerized ray tracing to optimize design, in late 2004 we began building a scale model of the azimuth tracking design. In early 2005 we were able to test it outdoors in Boulder and were very pleased with the preliminary results of that test. The design matured sufficiently at that point to permit securing our intellectual property through the U.S. Patent and Trade Office. Initial patents have been applied for.

The preliminary tests gave us confidence to proceed with the detailed engineering design and fabrication of our first full-scale model, called the "alpha" model. Sunflower contracted with Easter Owens Company of Arvada, CO (http://www.easter-owens.com/) to perform the detailed design and fabrication of the alpha unit. The company graciously offered to install it in one of their buildings, to enable testing and engineering modifications.   Alpha was completed over the winter of 2005-2006 and in early March of 2006.. The facility is set up as a mock 900 square foot classroom with a 9 foot ceiling and is heavily instrumented to analyzing its performance.  Monitoring is continuing to assess and enhance its performance in a variety of weather conditions. 

These tests are showing excellent optical performance while suggesting some mechanical changes to simplify the design and improve manufacturability and cost effectiveness.    When the design team is  satisified that the modifications  produce satisfactory results, we will proceed to the design and fabrication of two "beta" units for installation in a School of the Falcon School District of Colorado Springs, CO.

Additional variations on the basic design have been conceived, sketched, and evaluated through optical ray tracing work. This work will continue through final product development and the launching of full-scale manufacturing.

Alpha install, March 11, 2006

 

Installation on roof looking northwest

 

Mock classroom with light sensors set at desk level.  Even light distribution of well over 50 foot candles achieved with no glare on desks.

 

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Data acquisition system monitors 12 channels of lighting information, weather conditions, and has video of system on roof and appearance in daylit classroom.