Hilger & Watts 30 degree polygon
Autocollimation polygon with mirrors every 30 degrees.
Obtained from Belgium
Product details: Hilger & Watts 30 degree polygon | Hilger and Watts | Targets and prisms | |
This target is used for calibrating turn tables etc. For this it is put on the spindle and rotated. When using an autocollimator a perfect reflection will be obtained when the polygon has rotated through 30 degrees per turn. Most of the mirrors are still usable, but some have been tarnished over the years.
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Autocollimation polygon with mirrors every 30 degrees.
Obtained from Belgium
Product details: Hilger & Watts 30 degree polygon | Hilger and Watts | Targets and prisms | |