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Lee laser optical resonator alignment tool
A used Lee Laser Optical Resonator Alignment Tool used on Lee Laser YAG rails. It has no more than 3 hours of use. The Helium-Neon Pointing Laser emits the beam through front and rear targets to properly align the resonator. Instructions included, great for service technicians.
This is from Lee Laser's website:
"Alignment of the laser optical resonator is critical. If your laser application requires Qswitch operation at high frequency (> 10-15 kHz), then correct alignment of the laser optical resonator is critical to good pulse stability. Good optical alignment means that the beam must be centered in the YAG laser rod. It also means that the beam cannot pass angularly through the YAG rod; the beam must pass through the center of both ends of the YAG rod. Because the end faces of a YAG rod may not be exactly perpendicular ( ) to the rod centerline, use of an Alignment Autocollimator alone will not necessarily achieve the correct optical resonator alignment. To determine such correct alignment, it is necessary to use an alignment tool such as the Model LHN-2CM, Helium-Neon Pointing Laser. With the LHN-2CM and two target pinhole apertures that are included, the mechanical centerline of the optical resonator (and the YAG rod) can be established. Then alignment of the rest of the optical elements can proceed from this point."
