Abstract
We describe progress on a novel process-chain being used to produce eight 1.4m hexagonal segments as prototypes for the European Extremely Large Telescope - a Master Spherical Segment as a reference, and seven aspheric segments. A new pilot plant integrates a bespoke full-aperture test-tower designed and built by OpTIC Glyndŵr, with a Zeeko 1.6m polishing machine. The process chain starts with aspherising hexagonal segments on the Cranfield BoX™ grinder, followed by smoothing, corrective-polishing and edge-rectification using the Zeeko CNC platform. The paper describes the technology and progress, and anticipates how the process-chain is expected to evolve through the seven segments to increase both process-speed and surface-quality.
| Original language | English |
|---|---|
| Title of host publication | Optical Manufacturing and Testing IX |
| Volume | 8126 |
| DOIs | |
| Publication status | Published - 28 Nov 2011 |
| Externally published | Yes |
| Event | Optical Manufacturing and Testing IX - San Diego, United States Duration: 20 Aug 2011 → 22 Aug 2011 Conference number: IX https://spie.org/OPO/conferencedetails/optical-manufacturing-and-testing (Link to Conference Details ) |
Conference
| Conference | Optical Manufacturing and Testing IX |
|---|---|
| Country | United States |
| City | San Diego |
| Period | 20/08/11 → 22/08/11 |
| Internet address |
|
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Technologies for producing segments for Extremely Large Telescopes. / Walker, D.; Atkins, C.; Baker, I.; Evans, R.; Hamidi, S.; Harris, P.; Li, H.; Messelink, W.; Mitchell, J.; Parry-Jones, M.; Rees, P.; Yu, G.
Optical Manufacturing and Testing IX. Vol. 8126 2011. 812604.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Technologies for producing segments for Extremely Large Telescopes
AU - Walker, D.
AU - Atkins, C.
AU - Baker, I.
AU - Evans, R.
AU - Hamidi, S.
AU - Harris, P.
AU - Li, H.
AU - Messelink, W.
AU - Mitchell, J.
AU - Parry-Jones, M.
AU - Rees, P.
AU - Yu, G.
PY - 2011/11/28
Y1 - 2011/11/28
N2 - We describe progress on a novel process-chain being used to produce eight 1.4m hexagonal segments as prototypes for the European Extremely Large Telescope - a Master Spherical Segment as a reference, and seven aspheric segments. A new pilot plant integrates a bespoke full-aperture test-tower designed and built by OpTIC Glyndŵr, with a Zeeko 1.6m polishing machine. The process chain starts with aspherising hexagonal segments on the Cranfield BoX™ grinder, followed by smoothing, corrective-polishing and edge-rectification using the Zeeko CNC platform. The paper describes the technology and progress, and anticipates how the process-chain is expected to evolve through the seven segments to increase both process-speed and surface-quality.
AB - We describe progress on a novel process-chain being used to produce eight 1.4m hexagonal segments as prototypes for the European Extremely Large Telescope - a Master Spherical Segment as a reference, and seven aspheric segments. A new pilot plant integrates a bespoke full-aperture test-tower designed and built by OpTIC Glyndŵr, with a Zeeko 1.6m polishing machine. The process chain starts with aspherising hexagonal segments on the Cranfield BoX™ grinder, followed by smoothing, corrective-polishing and edge-rectification using the Zeeko CNC platform. The paper describes the technology and progress, and anticipates how the process-chain is expected to evolve through the seven segments to increase both process-speed and surface-quality.
KW - Asphere
KW - Off-axis
KW - Polishing
KW - Segment
KW - Telescope
UR - http://www.scopus.com/inward/record.url?scp=81855206615&partnerID=8YFLogxK
U2 - 10.1117/12.893360
DO - 10.1117/12.893360
M3 - Conference contribution
AN - SCOPUS:81855206615
SN - 9780819487360
VL - 8126
BT - Optical Manufacturing and Testing IX
ER -