Predictive models for the Strehl ratio of diamond-machined optics

Hamidreza Aryan (1) , Kevin Liang (2) , Miguel Alonso (3) , Thomas J Suleski (1)

1 UNC - University of North Carolina [Charlotte]
2 University of Rochester [USA]
3 MOSAIC - MOSAIC

This paper provides a practical connection between the Strehl ratio as an optical performance metric and manufacturing parameters for diamond machined optics. The choice of fabrication parameters impacts residual mid-spatial frequency groove structures over the part's surface, which reduce optical performance. Connections between the Strehl ratio and the fabrication parameters are studied using rigorous Rayleigh-Sommerfeld simulations for a sample optical system. The connections are generalized by incorporating the shape of diamond-machined groove structures and the effects of optical path differences for both transmissive and reflective optics. This work validates the analytical representation of the Strehl ratio as a Fourier transform of a probability density that relates to surface errors. The result is a practical tool that can be used to guide the choice of machining parameters to achieve a targeted optical performance.

Domaines: Physique [physics]; Optique / photonique

Hamidreza Aryan, Kevin Liang, Miguel Alonso, Thomas J Suleski. Predictive models for the Strehl ratio of diamond-machined optics. Applied optics, 2019, 58 (12), pp.3272. ⟨10.1364/AO.58.003272⟩. ⟨hal-02131555⟩