Micro Alignment Telescope
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.
Principles of Alignment
The basic measurement principles available with 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 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 sqaureness and angular measurement using reflective Mirror Targets.
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: | 25mm (1in) to infinity |
| Image: | Erect |
Accuracy: Within 0.05mm (0.002in) at 30m (100ft) and proportionally for longer or shorter distances down to about 3m (10ft). Below this distance the errors are less than the precision to which the micrometers can be read.