DAVIDSON OPTRONICS Model D-639 Trihedral Prism

TRIHEDRAL PRISM -- D-639

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.
Features:

Quickly determines Infinity focus for autocollimation

Requires no adjustment for off-angle coincident beams

Accurately establishes required coincidence of reticles

Detailed Specifications:

Accuracy		2 arc seconds
Aperture Diameter		2˝"
Material	Prism	BK-7 Glass
	Mount	Aluminum
Overall Dimensions	Height	4"
	Width	4"
	Depth	2ž"
Finish		Ivory Enamel
Carrying Case		Ethafoam lined Finished Hardwood
Prism Weight		4 pounds
Shipping Weight		8 pounds

Davidson Optronics, Inc.
Phone: (626) 962-5181
Fax: (626) 962-5188
E-mail: sales@davidsonoptronics.com