Dr. John B. Mitchell Profile

Dr. John B. Mitchell

Senior Optical Metrologist at Compass Optics Ltd

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Author

Publications (7)

SPIE Journal Paper | 20 October 2020

Development of a lightweight camera for high altitude platform systems

Paul C. Rees, Ian Baker, David Thomson, Dean Catterall, Martin Coleman, Martyn Jones, John Mitchell

OE Vol. 59 Issue 10

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Proceedings Article | 21 June 2019 Presentation + Paper

Full-field, high-frequency, heterodyne interferometry for dynamic metrology based on phase detection using a modified time-of-flight camera

John Mitchell, Gareth Roberts, Paul Rees

Proc. SPIE. 11056, Optical Measurement Systems for Industrial Inspection XI

KEYWORDS: Mirrors, Beam splitters, Modulation, Interferometers, Cameras, Sensors, Interferometry, Heterodyning, Time of flight cameras, Signal detection

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Proceedings Article | 27 August 2015 Paper

The use of diffractive imitator optics as calibration artefacts

Paul Rees, John Mitchell, Andy Volkov, Jean-Michel Asfour, Frank Weidner, Alexander Poleshchuk, Ruslan Nasyrov

Proc. SPIE. 9575, Optical Manufacturing and Testing XI

KEYWORDS: Optical spheres, Calibration, Wavefronts, Optical fabrication, Optical testing, Computer generated holography, Optical alignment, Optical calibration, Optics manufacturing, Prototyping

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Proceedings Article | 7 September 2013 Paper

Fast manufacturing of E-ELT mirror segments using CNC polishing

C. Gray, I. Baker, G. Davies, R. Evans, N. Field, T. Fox-Leonard, W. Messelink, J. Mitchell, P. Rees, S. Waine, D. Walker, G. Yu

Proc. SPIE. 8838, Optical Manufacturing and Testing X

KEYWORDS: Telescopes, Mirrors, Polishing, Metrology, Manufacturing, Optical testing, Aspheric lenses, Optics manufacturing, Prototyping, Surface finishing

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Proceedings Article | 13 September 2012 Paper

Edge-control and surface-smoothness in sub-aperture polishing of mirror segments

D. Walker, A. Beaucamp, R. Evans, T. Fox-Leonard, N. Fairhurst, C. Gray, S. Hamidi, H. Li, W. Messelink, J. Mitchell, P. Rees, G. Yu

Proc. SPIE. 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II

KEYWORDS: Telescopes, Mirrors, Polishing, Spatial frequencies, Space telescopes, Aspheric lenses, Spherical lenses, Optics manufacturing, Prototyping, Surface finishing

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Proceedings Article | 27 September 2011 Paper

Non-contact profilometry of E-ELT segments at OpTIC Glyndwr

Carolyn Atkins, John Mitchell, Paul Rees

Proc. SPIE. 8126, Optical Manufacturing and Testing IX

KEYWORDS: Polishing, Polishing equipment, Nano opto mechanical systems, Optical testing, Autocollimators, Algorithm development, Spherical lenses, Optics manufacturing, Prototyping, Surface finishing

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Proceedings Article | 27 September 2011 Paper

Technologies for producing segments for extremely large telescopes

D. Walker, C. Atkins, I. Baker, R. Evans, S. Hamidi, P. Harris, H. Li, W. Messelink, J. Mitchell, M. Parry-Jones, P. Rees, G. Yu

Proc. SPIE. 8126, Optical Manufacturing and Testing IX

KEYWORDS: Mirrors, Polishing, Metrology, Polishing equipment, Manufacturing, Optical testing, Profilometers, Aspheric lenses, Large telescopes, Prototyping

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Showing 5 of 7 publications

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