ACute3D: A Compact, Cost-Effective, 3-D Printed Laser Autocollimator

Qingxin Meng, Julian Stirling, William J. Wadsworth, Richard W. Bowman

Research output: Contribution to journalArticlepeer-review

Abstract

The ACute3D is a compact laser autocollimator, capable of precise angle measurement in two orthogonal directions over a maximum measurement range of 7200\times5300 arcsec. The measurement uncertainty over the middle third of its range is less than 3 arcsec. Our novel design exploits the geometric freedom of fused filament 3-D printing to realize a monolithic optomechanical assembly. The monolithic block makes the instrument compact, lightweight, stiff, and resistant to drift, as well as minimizing alignment during assembly and minimizing cost. Our openly licensed design together with our use of digital fabrication makes this autocollimator convenient to customize or integrate into larger instruments. The total bill of materials cost is around 200, making precise angle measurement available in a wide range of contexts. We demonstrate an application of the ACute3D by measuring the angular deviation of a precision linear stage, showing that our design is ready for typical laboratory use.

Original languageEnglish
Article number5012111
JournalIEEE Transactions on Instrumentation and Measurement
Volume71
Early online date13 May 2022
DOIs
Publication statusPublished - 31 Dec 2022

Keywords

  • 3-D printing
  • open source hardware
  • optical sensors

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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