Curved freeform sensors for high-end scientific applications

Emmanuel Hugot; Manal Chebbo; Frédéric Chavane; Christian Kintziger; Pierre-Alain Duc; Jiawei Liu; Eduard Muslimov; Samuel Boissier; Indraneil Biswass; Eloise Bernaud; Marc Ferrari

doi:10.1117/12.3022716

18 June 2024 Curved freeform sensors for high-end scientific applications

Emmanuel Hugot, Manal Chebbo, Frédéric Chavane, Christian Kintziger, Pierre-Alain Duc, Jiawei Liu, Eduard Muslimov, Samuel Boissier, Indraneil Biswass, Eloise Bernaud, Marc Ferrari

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Proceedings Volume 13019, Optical Design and Engineering IX; 1301915 (2024) https://doi.org/10.1117/12.3022716
Event: SPIE Optical Systems Design, 2024, Strasbourg, France

Abstract

The field curvature has been a long-term problem optical designers had to deal with, to propose flat corrected field instruments. Combinations of highly aspherical optics, TMA configurations, achromatic doublets or field flatteners are often used to reach good optical quality across the image. Allowing designers to play with the parameters of the field’s shape is offering them a brand-new game field. The possibility of curving the CMOS sensors to fit curved/aspherical/freeform shapes of focal surfaces has been studied for the last 20 years and led today to different applications and prototypes. We present in this article 1/ the parameter studies we performed over a large set of optical designs showing the gain offered by this approach, 2/ the CMOS sensors curving process and performance over a large set of prototypes, 3/ Optical systems that have been produced with this technology and 4/ the roadmap related to the development of curved-sensors based instrumentation for astronomy with the CASTLE telescope project and physical sciences through the Auroral UV Imager program led by ESA, and the IMANCES project led by the Neurosciences Institute INT.

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Emmanuel Hugot, Manal Chebbo, Frédéric Chavane, Christian Kintziger, Pierre-Alain Duc, Jiawei Liu, Eduard Muslimov, Samuel Boissier, Indraneil Biswass, Eloise Bernaud, and Marc Ferrari "Curved freeform sensors for high-end scientific applications", Proc. SPIE 13019, Optical Design and Engineering IX, 1301915 (18 June 2024); https://doi.org/10.1117/12.3022716

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KEYWORDS

Sensors

CMOS sensors

Image quality

Prototyping

Optical instrument design

Physical sciences

Telescopes

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