OPTICAL CUBES -- D-686

D-686 OPTICAL CUBES

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.

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 NIST

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°.

Specifications

Flatness:		Five surfaces polished; flat to λ/10
Surface Quality:		80/50 per MIL-O-13830
Material:	Cube:	Fused Silica
	Mount:	Steel
Coating:		Aluminum with protective overcoat per MIL-M-13508
Surface Dimensions:		1.5 inch (38 mm)
Overall Dimensions:	Height:	3.125 inch (79 mm)
	Width:	4.25 inch (108 mm)
	Length:	4.6875 inch (119 mm)
	Height to Cube Center:	1.875 inch (48 mm)
Finish:		Ivory enamel
Carrying Case:		Hardwood
Weight:		3.5 lbs (1.6 kg)
Shipping Weight:		12 lbs (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.

Support Documentation

D-686 Data Sheet

D-686 Drawing