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astro-ph.IM2026
Dynamic Range Beyond Bit Depth of a CMOS Image Sensor Using Interleaved Row Readout
Supriyo Ghosh, William Martin, Hugh R. A. Jones +3
The dynamic range available from a sensor is vital to its utility. The limits on the dynamic range that can be obtained from an image sensor are set by the brightest and faintest o…
astro-ph.IM2025
Use of solid fused silica etalon with broadband metallic coatings for calibration of high-resolution optical spectrograph
Supriyo Ghosh, William Martin, Kajal Kunverji +1
Wavelength calibration is a key factor for high-resolution spectroscopic measurements for precision radial velocities. Hollow-cathode lamps (e.g., ThAr), absorption cells (e.g., io…
astro-ph.IM2023
Mitigating Modal Noise in Multimode Circular Fibres by Optical Agitation using a Galvanometer
Supriyo Ghosh, Chantira Boonsri, William Martin +6
Modal noise appears due to the non-uniform and unstable distribution of light intensity among the finite number of modes in multimode fibres. It is an important limiting factor in…