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Roll angle autocollimator measurement method based on a cylindrical cube-corner reflector with a high resolution and
Optics Express
|March 18, 2022
Summary
A new autocollimator measurement system uses a novel reflector to achieve a large measurement range of ±20° with high resolution. This roll angle measurement system offers enhanced performance for precision applications.
Area of Science:
- Optical Engineering
- Metrology
- Instrumentation
Background:
- Traditional autocollimators (AC) have limitations in measurement range.
- Precision angle measurement is critical in various industrial and scientific fields.
Purpose of the Study:
- To develop a novel high-resolution and large-range autocollimator measurement system for roll angle.
- To enhance the measurement range and accuracy of autocollimator systems.
Main Methods:
- A novel non-standard cylindrical cube-corner reflector (CCCR) was employed, replacing the traditional planar reflector.
- The mathematical relationship between the CCCR structure and reflected beam spatial coordinate vector change was deduced.
- A measurement formula for the roll angle autocollimator (RAC) system was established.
Main Results:
- The proposed system effectively enhances the measurement range to ±20°.
- The overall measurement accuracy achieved is 6.1 arcseconds.
- The system demonstrates a measuring resolution of 1 arcsecond.
Conclusions:
- The novel autocollimator system with a CCCR provides a significant improvement in measurement range and resolution.
- The established mathematical model and experimental verification confirm the system's effectiveness for precise roll angle measurements.
