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IR, LED and Laser Project
This is a personal project I started working on last year using RGB LED's, LED laser diodes.
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beacon elevation ring
Loaded the beacon into the truck and drove out to a lonely spot in the desert to test the unit tonight. A high current connector for 12 VDC still needs to be installed as well as a better mount for azimuth steering. Unit loaded into truck for night testing. (Click on photo's to see larger size).

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backside1
Large 12" X 12" X 3.5" aluminum heat sink with 12 VDC auto radiator fan attached.

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circuit boards
I have four "570" watt Peltier coolers installed under the block of aluminum, they are 62 mm X 62 mm, these TEC's are about as large as they come and cost about 40 dollars each on ebay. The actual cooling capacity is close to 350 watts each. This photo shows parts placement and was taken before most of the wiring had been done. The amount of Peltier/TEC coolers are far in excess of what is required to cool the LED's or 2 watt lasers.

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sideview
Side view showing a few of the two watt 445nm (blue) lasers surrounding the LED's on top, below them on the sides are the constant current driver boards for the 2W lasers running at low output. The lasers operate in line mode only, not spot mode which can be dangerous to vision at great distances. Update: Single line lenses changed to cross line lenses.

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electronics
Placement of LED controller, 12 VDC PWM duty cycle boards for Peltier thermo electric coolers, 12 VDC to 35 VDC booster power supplies, 16 two watt 445nm lasers, 8 one hundred watt RGB LED's.

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200W Center LED
Since this photo was taken the 50 watt units have been replaced with 100 watt LED's for a total of 800 watts. Adding an additional 200 watt unit to the center now.

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BEACON.mp4
Short video showing RGB alternating colors at low power output when 50W units were installed (click on photo to view movie).

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beacon flash.mp4
High power output test of 50 watt RGB light emitting diodes (click on photo to view movie).

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beacon w truck b
Testing in Arizona.

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close beacon
Unit still needs a large DC connector installed, direct wired until then. 40 foot run of 2/0 welding cable to truck with 130 amp alternator.

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Mov beacon.mp4
Most recent test.

 
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Link to atmospheric transmittance graph: http://fuse.pha.jhu.edu/~wpb/spectroscopy/figures/trans.gif
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Chris | http://fuse.pha.jhu.edu/~wpb/spectroscopy/figures/trans.gif, Fri, 6 Mar 2015 9:15PM
 
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