Visual autocollimators measure the angle of optically flat (1/4 wave or better), reflective surfaces in arc seconds by viewing a
graduated reticle through an eyepiece.


The longer the focal length of the autocollimator, the greater the angular resolution and the smaller the field of view.  These
autocollimators are fixed-focus at infinity, however we have Möller-Wedel adjustable focus autocollimators available as well.  A
TV camera can be installed on the eyepiece for ease of viewing.  A complete line of autocollimator mounts, mirrors, pentaprisms,
and achromats are available for specific applications.

Visual Autcollimator Specifications:

Focal Length (mm) 90 140 200 300 500 600 1100
Specifications:              
Accuracy (arc seconds) 11.5" 7.5" 5" 3.5" 2"   1"
Resolution* (arc seconds) 2.0" 1.0" 0.5" 0.4" 0.3" 0.2" 0.1"
Range of Graduations on Reticle
(arc minutes)		 ± 60' ± 50' ± 25' ± 25' ± 12.5'   ± 7'
Aperture (mm) 16 28 28 28/50 28/50 100 78
Barrel Diameter (mm) 40 40 40 40/65 40/65 128 105

* Micrometer-driven reticles required to achieve these resolutions

View Visual Autocollimators in Catalog - Download Catalog - View Visual Autocollimator Instruction Manual

View Accessories for Visual Autocollimators (holders, mirrors, attachment lenses, etc.)

View Modular Components for Visual Autocollimators (illumination, eyepieces, reticles, adjustable focus, etc.)

View Article on principles of Small Angles and Autocollimators