DAVIDSON OPTRONICS Model D-275 Autocollimating Alignment Telescope

AUTOCOLLIMATING ALIGNMENT TELESCOPE -- D-275

The Model D-275 Autocollimating Alignment Telescope can be focused from 16 inches (400 mm) to infinity to align any number of points along its optical axis. Due to the fact that the mechanical axis of the tube and the optical axis of the instrument are parallel within 3 arc seconds, the instrument is easily adaptable to jigs and setups using a dial indicator.

Features:

Telescope for simplest, most accurate alignment plus 2-axis perpendicularity to line of sight through autocollimation

Low cost to permit semi-permanent installation in fixture

Annular rings and crossed-line reticles allow uncluttered view of reference, easy reading

Hardened stainless steel telescope tube

Certification of accuracy traceable to National Institute of Standards and Technology

A reflective surface may be established normal to the optical axis by utilizing the autocollimating feature. The Model D-275 is designed to provide the most-needed features as standard equipment at a low price.

Detailed Specifications:

Eyepiece Magnification		24X
Focusing Range		16 inches (400 mm) to infinity (has focusing knob)
Resolution		5 arc seconds
Field		26 Inch at 100 feet (660 mm at 30 m)
Focal Length		14.3 Inch (363 mm)
Aperture		1-11/32 Inch (34 mm)
Light Source		GE #328 lamp (2 spares included)
115V Power Supply		Model D-416 Power Pack, variable from 0 though 6 volts DC
Reticles	Autocollimating	Fifteen concentric circles 1 arc minute apart (30 arc minute field)
Alignment	Cross hairs with 0.000 25 Inch (6.4 μm) wide lines
Barrel Dimensions	Length	12¼ Inch (311 mm)
Barrel Dimensions	Diameter	2.249 66±0.000 25 Inch (57.135 - 57.148 mm) Optical Axis Concentric ±0.000 3 Inch at 16 Inch (±7.6 μm at 400 mm)
Overall Dimensions	Height	4⅞ Inch (124 mm)
	Width	3-3/16 Inch (56 mm)
	Length	20⅜ Inch (518 mm)
	Height to Aperture Center	1.325 Inch (33.7 mm)
Material	Housing	Aluminum
Material	Barrel	17.4 PH stainless steel hardened to Rockwell C 45-47
Finish	Housing	Ivory Enamel
Finish	Barrel	Polished Chrome Plate
Carrying Case		Finished Hardwood, Ethafoam fitted for instrument and light source
Instrument Weight		13 pounds (5.9 kg)
Shipping Weight		26 pounds (11.8 kg)

Optional Accessories:
- Model D-165 High Intensity Light Source. This option may be required when autocollimating off of low reflectivity surfaces or small mirrors.
- Model D-247 Table Instrument Stand
- Model D-254 Adjustable Instrument Stand
- Model D-276 Adjustable Instrument Stand
- Model D-277 Adjustable Instrument Stand
- Model D-295 Adjustable Instrument Stand
- Model D-416B 220V 50Hz Power Supply
- P/N 105-2761-275 Video Camera & Monitor with integral camera power supply. With this option readings become very easy even for unskilled personnel. Repeat readings are more accurate and faster. The camera eliminates any errors from parallax and greatly reduces eye fatigue. This option is easily added to existing Model D-275s.

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