DAVIDSON OPTRONICS Model D-686 Optical Cubes

OPTICAL CUBES -- D-686

Model D-686 Optical Cubes are used in the laboratory or wherever a master reference, master locator, or master calibrator is needed for precise work. Made of the best quality quartz, the five working surfaces are polished and flat to 1/10th wave length of mercury 5461Å and mutually orthogonal within 2 arc seconds.
Features:

Master reference to establish planes 90° to each other

Five faces mutually orthogonal within 2 arc seconds

Adjustable base simplifies alignment

Certification of accuracy traceable to National Institute of Standards and Technology

Precision tilt adjustment is quickly and accurately obtained by adjusting the leveling screws (120 threads per inch). For tests, this instrument excels in establishing planes at 90° to each other, in verifying lines of sight and in qualifying optical axes at 90°.

Detailed Specifications for Model D-688 Optical Cubes:

Flatness		5 surfaces: ⅕ fringe
Surface Quality		80/50 per MIL 13830
Material	Cube	Fused Silica
	Mount	Steel
Coating		Aluminum with protective overcoat per MIL-M-13508
Surface Dimensions		1½ Inch (38 mm) square
Overall Dimensions	Height	3⅛ Inch (79 mm)
	Width	4¼ Inch (108 mm)
	Length	4-11/16 Inch (119 mm)
	Height to Cube Center	1⅞ Inch (48 mm)
Finish		Ivory Enamel
Carrying Case		Ethafoam lined Finished Hardwood
Cube Weight		3½ pounds (1.6 kg)
Shipping Weight		12 pounds (5.5 kg)

Model D-688 Optical Cubes have the same specifications, adjustable base and other details identical to the Model D-686 Optical Cubes, but have larger 2-inch (51 mm) square surface dimensions.

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