Micro Alignment Telescope

micro alignment telescope
micro alignment telescope with fixtures

The Taylor Hobson Micro Alignment Telescope is used for checking and setting for example:

  • Alignment (series of bores or bearings)
  • Squareness (column to a base)
  • Parallelism (series of rollers)
  • Level/flatness (machine bed foundation)
  • Straightness (rails or guideways)

With its optical and mechanical axes aligned to within 3 seconds, a typical accuracy of 50-70um at 30m is achievable with the Micro Alignment Telescope.  Closer distances produce better results with a best accuracy of around 5-10um.

(The Micro Alignment Telescope is also available as a Digital Alignment Telescope using high resolution CCD technology).

Principles of Alignment

line of sight
Micro alignment telescope creates a straight line of sight from zero to infinity

The basic measurement capabilities of the Micro Alignment Telescope system are Alignment, Squareness, Flatness, Autocollimation and Autoreflection.  The Micro Alignment Telescope generates a straight line of sight from zero to infinity.  This forms the basic reference from which all measurements are taken.

To measure squareness or parallelism a penta prism is used to deviate the straight line through exactly 90 degrees.  A similar rotating penta prism is used to generate a plane for flatness measurement.

The Telescope is designed to allow Autocollimation and Autoreflection, providing for angular squareness and angle measurement using reflective Mirror Targets and a lamphouse.

There is a comprehensive range of accessories enabling the Telescope, Targets and Prisms to be mounted to the work concerned.

Technical Data

Micrometer Range: +/-1.2mm (+0.05in) with 0.02mm (0.001in) graduations
Barrel Material: Chromium plated hardened steel precision ground after plating
Barrel Diameter: 57.137-57.147mm (2.2495-2.2499in)
Optical Axis:

Parallel to mechanical axis within 3 arc seconds and concentric within 6um (0.00025in)

Field of View: From 50mm (2in) at 2m (65ft) to 600mm (24in) at 30m (100ft)
Magnification: x34
Focusing Range: zero to infinity
Image: Erect

Accuracy: Within 0.05mm (0.002in) at 30m (100ft) and proportionally for longer or shorter distances down 5-10um at 3m (10ft).

See the Micro Alignment Telescope in action: