Ms. Radhika Dharmadhikari Profile

Radhika Dharmadhikari

at Indian Institute of Astrophysics

SPIE Involvement:

Author

Publications (7)

Proceedings Article | 11 September 2024 Presentation + Paper

Simulation and experimental study of the OTF-based alignment and phasing of segmented mirrors

Radhika Dharmadhikari, Padmakar Parihar

Proceedings Volume 13094, 1309427 (2024) https://doi.org/10.1117/12.3018465

KEYWORDS: Modulation transfer functions, Optical transfer functions, Phase transfer function, Point spread functions, Mirrors, Telescopes, Wavefront errors, Segmented mirrors

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Proceedings Article | 27 August 2024 Poster + Paper

Differential optical transfer function (dOTF) wavefront sensing with the SPEED test-bed

R. Dharmadhikari, P. Martinez, C. Gouvret, A. Marcotto, A. Spang, J. Dejonghe, M. Beaulieu, C. Sallard

Proceedings Volume 13097, 130973Q (2024) https://doi.org/10.1117/12.3019044

KEYWORDS: Deconvolution, Image segmentation, Point spread functions, Simulations, Phase measurement, Optical transfer functions, Wavefronts, Wavefront sensors, Wavefront errors, Mirrors

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Proceedings Article | 27 August 2024 Poster + Paper

Revisiting optical transfer function-based focal plane wavefront sensors for correcting NCPAs

P. Martinez, R. Dharmadhikari, A. Spang

Proceedings Volume 13097, 130973P (2024) https://doi.org/10.1117/12.3019041

KEYWORDS: Optical transfer functions, Wavefront sensors, Electric fields, Coronagraphy, Sensors, Modulation, Fourier transforms, Actuators, Cameras, Wavefronts

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SPIE Journal Paper | 5 March 2024

Development of an alignment device for the Prototype Segmented Mirror Telescope

Radhika Dharmadhikari, Padmakar Singh Parihar, Mohammed Muthahar Rafeeq Ahmed, Govinda Koravangala Venkatapathaiah, Madan Mohan Kemkar, Himanshu Kunjam

JATIS, Vol. 10, Issue 01, 019002, (March 2024) https://doi.org/10.1117/12.10.1117/1.JATIS.10.1.019002

KEYWORDS: Telescopes, Mirrors, Design, Beam splitters, Optical alignment, Image segmentation, Sensors, Segmented mirrors, Lens arrays, Image quality

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Proceedings Article | 12 May 2023 Poster + Paper

Optical design of FOSC and wide field aberration corrector for the prototype segmented mirror telescope

Radhika Dharmadhikari, Annu Jacob, Padmakar Parihar

Proceedings Volume 12638, 1263807 (2023) https://doi.org/10.1117/12.2669796

KEYWORDS: Spectroscopy, Telescopes, Design and modelling, Optical design, Image quality, Segmented mirrors, Equipment, Cameras, Collimators

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Proceedings Article | 29 August 2022 Paper

Design and development of a mirror support system for prototype segmented mirror telescope

Govinda K.V., Padmakar Parihar, P.M.M. Kemkar, Abhishek Goudar, Sandeep D.S., R. Mohammed Muthahar, Sagayanathan K., Radhika Dharmadhikari, Divya P.H.

Proceedings Volume 12182, 121821F (2022) https://doi.org/10.1117/12.2628875

KEYWORDS: Mirrors, Telescopes, Optical instrument design, Optical fabrication, Actuators, Segmented mirrors, Prototyping, Manufacturing, Finite element methods, Temperature metrology

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Proceedings Article | 29 August 2022 Paper

Study on segmentation and alignment related effects in a 10m class telescope

Annu Jacob, Padmakar Singh Parihar, Melvin James, Radhika Dharmadhikari

Proceedings Volume 12182, 1218224 (2022) https://doi.org/10.1117/12.2629948

KEYWORDS: Telescopes, Mirrors, Point spread functions, Image segmentation, Error analysis, Optical instrument design, Diffraction, Segmented mirrors, Optical design, Zemax

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Showing 5 of 7 publications

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