| Title: |
Modelling performance degradation of typical mid-spatial frequency errors in diamond-machined mirror arrays in the GMTIFS integral field unit |
| Authors: |
Kruse, Andrew W.; Vaughn, Israel J.; Rebrysh, Oleksandra; Greggio, Davide; Sharp, Rob |
| Publisher Information: |
SPIE |
| Publication Year: |
2024 |
| Collection: |
Australian National University: ANU Digital Collections |
| Subject Terms: |
adaptive optics; diamond turning; fabrication; instrumentation; Mid-spatial frequencies; spectrographs; surface errors |
| Description: |
The optical design of the GMTIFS integral field unit includes several mirror arrays that are proposed to be diamond machined, including the pupil and field mirror arrays as well as the image slicer. The fabrication process of diamond machined surfaces often leaves behind tool marks at mid-spatial frequencies which can have significant impact on optical performance that is not fully accounted for by errors in high-spatial frequency (surface roughness) or low-spatial frequency (form error). The structure and form of these mid-spatial frequencies is dependent on the specific machining and polishing techniques used in the fabrication of the optical elements. In this study, we model and implement representative surfaces in ray tracing software to characterise the effects of mid-spatial frequency errors on the mirror arrays in the GMTIFS spectrograph. ; Peer-reviewed |
| Document Type: |
conference object |
| Language: |
English |
| ISBN: |
978-1-5106-7523-0; 1-5106-7523-X |
| Relation: |
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI 2024; Proceedings of SPIE - The International Society for Optical Engineering; http://www.scopus.com/inward/record.url?scp=85205966685&partnerID=8YFLogxK; https://hdl.handle.net/1885/733759951; 85205966685 |
| DOI: |
10.1117/12.3019522 |
| Availability: |
https://hdl.handle.net/1885/733759951; http://www.scopus.com/inward/record.url?scp=85205966685&partnerID=8YFLogxK; https://doi.org/10.1117/12.3019522 |
| Rights: |
Publisher Copyright: © 2024 SPIE. |
| Accession Number: |
edsbas.B955AFD0 |
| Database: |
BASE |