DAVIDSON OPTRONICS Model D-626 Optical Level

OPTICAL LEVEL -- D-626

The Model D-626 Optical Level has been designed as an aid to adjust the optical line of sight from an autocollimator until it is precisely level.
Features:

Self-checking qualities prove instrument is truly level

Parallel Reflective Surfaces self-aligning to gravitational pull of earth

Provided with adjustable leveling plate for uneven surfaces

The level contains a plane parallel mirror firmly fixed to a suspended pendulum in the housing. To prevent continual swing of the pendulum and to dampen vibration, an oil pool system is incorporated allowing the mirror to settle within a period of 2 minutes. Repeat reading from an autocollimator can be acquired from one surface of the mirror to the other within I arc second, thus proving the mirror surface is aligned with the gravitational pull of the earth.
Provisions are made for preserving the delicate pivotal points during periods of storage.

Detailed Specifications:

Accuracy		1 Arc Second
Flatness		1/5 fringe both sides
Parallelism		1 Arc Second
Material	Mirror	Pyrex Glass
	Housing	Aluminum alloy
	Knife Edges and Pads	Tungsten Carbide
	Oil	Dow Corning #200 Fluid, Viscosity Grade 10,000 cs. at 25°C
Coating		Aluminum with protective overcoat per MIL-M-13508
Mirror Dimensions	Height	1½"
	Width	1½"
	Thickness	½"
Overall Dimensions	Height	7.8"
	Diameter	4.0"
	Surface to Center of Mirror	6.7"
Finish		Ivory Enamel
Carrying Case		Ethafoam lined Finished Hardwood
Level Weight		8 pound
Shipping Weight		16 pounds

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