Laser Beam Concentrator/Aiming Device
Glass Lens/Tin Can Version
The lens is surplus/salvage from a stage lighting device. The effective diameter is about 5" (12.5cm). The body of the concentrator is made of tin cans - coffee, beans and condensed milk.
Rear View
The cans are held together with epoxy. The reticle is located at the junction of the bean can and the condensed milk can.
With Lens Hood
The lens and hood are held in place with RTV silicone.
View of the Reticle During Installation
The 'legs' were then soldered to the can.
Photosensor Installed in the Reticle
Photos of the long-range version of the laser beam concentrator in action can be seen here.
More information about this device can be found here.
Warning: This device is meant to be used with a visible class-IIIa (<5 mW) laser at a distance.
Do not look at any higher-powered laser with this device!
Do not view any laser through this device at a distance less than 1/4 mile (400m)!
Related Links
Plastic Fresnel lens/irrigation pipe version.
Laser Beam Concentrator Technical Details
Music on a Light Beam - the System Tested
Related External Link
Using Laser Pointers for Free-Space Optical Communications
