Decreases beam spread of visible and infra red lasers by a factor of 7 at far field. Simple to construct, fits most laser pointers with simple shimming. Lens LE2475 is 1.35" diameter x 0.125" thickness, made of glass. Lens LE15 is 0.65" diameter x 0.12" thickness, made of glass. These glass lenses can handle much higher powers than plastic lenses which may overheat melt at powers as low as 100mw. Kit includes lenses and plans only; other parts are easily obtainable from your hardware store.
The plans are available for free:
|This is a kit with plans and all parts included, requiring assembly.
It is also available fully assembled and ready to use.
Or as plans (paper or downloadable versions), with parts and assembly required.