D-639  TRIHEDRAL PRISM

• Quickly determines Infinity focus for autocollimation
• Requires no adjustment for off-angle coincident beams
• Accurately establishes required coincidence of reticles
• Angular deviation certified traceable to NIST

Trihedral Prisms are also commonly known as retro-reflectors, cube corners or corner cubes.  These terms all refer to the same object type.

No adjustment is needed to set the D-639 Trihedral Prismnormal to the autocollimator axis.  This means faster, easier checking of autocollimator internal and infinity focus.

                                                          Support Documentation

 D-639 Data Sheet

 D-639 Drawing