Dubuque, IA Free Moderated Classifieds Site > This Month Ads
> Tools
> Hand Tools
> Davidson d-639 trihedral prism w/d-406A
Davidson d-639 trihedral prism w/d-406A
Davidson D-639 Tridhedral Prism
Also has a D-406A 6 Volt Power Pack Assembly and 2 extra light bulbs
No adjustment is needed to set the Model D-639 Trihedral Prism normal to the autocollimator axis. This means faster, easier checking of autocollimator internal and infinity focii.
* Quickly determines Infinity focus for autocollimation
* Requires no adjustment for off-angle coincident beams
* Accurately establishes required coincidence of reticles
Overall Dimensions: 4" High x 4" Wide x 2.75" Deep
Carrying Case: Ethafoam lined Finished Hardwood
