DAVIDSON OPTRONICS Model D-278 16" Reflective Lens Bench

16" REFLECTIVE LENS BENCH -- D-278

Model D-274 16" Reflective Lens Bench
The Model D-278 16" Reflective Lens Bench is an extremely stable, multi-purpose instrument for testing optical systems and lenses from the visual through the infrared.

Features:

16" diameter reflective optical system

Extremely accurate optics

Capable of supporting large heavy systems

Detailed Specifications:

Primary & Secondary Mirrors	Flatness	1/20 fringe or better
Primary & Secondary Mirrors	Coating	Aluminum with protective overcoat per MIL-M-13508
Parabolic Primary Mirror	Diameter	16"
	Thickness	2.7"
	Focal Length	107"
Secondary Mirror	Diameter	18"
Secondary Mirror	Center Hole Diameter	1½"
Collimated Beam		Aperture diameter 15½ ±½". Central obscuration does not exceed 1½". Maximum deviation of collimated beam from parallelism over entire field of view is less than 2 arc seconds.
Overall Dimension	Height	66"
	Width	22"
	Length	186"
	Between Feet	133"
Rails		Length 108.0" flat and straight within 0.010", each contains a flat and V-rail with approximately 6½" between centers
Large Carriage		Rack and pinion traversing mechanism with position locking knob. Length: 30" -- Width: 20"
Height of Centerline Collimated Beam	To Floor	54"
	To Rail	22½"
	To Top-Large and Small Carriages	19"
	To Top-Nodal Slide	9.8"
Height Pin to Chopper Plate		7½"
Lens Bench Weight		2,400 pounds
Shipping Weight		4,700 pounds

Model D-170 Light Chopper

Optional Accessories:
- The Model D-170 Light Chopper has a variable speed motor with equally spaced slits. The aperture disc, a 4" diameter, 1/8" thick aluminum disc containing equally spaced ½" holes on a 2½" diameter bolt circle. Inserted in these holes are pinhole adapters, having the following hole sizes: 0.002", 0.004", 0.006", 0.012", 0.024", and 0.060" diameter. The condenser Light Source contains sapphire lenses for infrared and visible wavelength operation - range 0.35 to 15 microns.
- P/N 105-211 Left & P/N 105-0212 Right Side by Side 9-3/8" x 18" Small Carriages
- P/N 108-0063 Microscope & T-bar Assembly is mounted on an Azimuth and Elevation adjustable stand attached to the extreme end of the bench. The T-Bar is mounted in the optional cross slide - rotary table compound. The microscope is used for observing and testing lenses and related optics. The T-Bar is designed to provide a means of precisely positioning the test lens during testing.
- P/N 535-0052 Cross Slide
- P/N 580-0015 Rotary Table

Optional Alignment Equipment:
- Model D-247 Table Instrument Stand
- Model D-275 Autocollimating Alignment Telescope
- Model D-276 Adjustable Instrument Stand
- Model D-277 Adjustable Instrument Stand
- Model D-295 Adjustable Instrument Stand
- Model D-569 12" Diameter Adjustable Reference Mirror

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