A technique of measuring spectral characteristics of detector arrays in amateur and professional photocameras and their application for problems of digital holography

Lesnichii, V. V.; Petrov, Nikolay V.; Cheremkhin, Pavel A.

doi:10.1134/s0030400x13100093

Cited by 10 publications

(3 citation statements)

References 21 publications

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“…Such restrictions take place in femtosecond holography [38][39][40] where the proposed implementation might now be applied. Additionally, PPP rotation might be realized in multicolor holography with color filters on a registration matrix [41][42][43]. The simplicity and cost-effectiveness of the considered phase-shifter allows widespread use of PSDH, overcoming the PZT technical barrier without loss in the reconstruction quality.…”

Section: Discussionmentioning

confidence: 99%

Phase Retardation Analysis in a Rotated Plane-Parallel Plate for Phase-Shifting Digital Holography

Shevkunov

Petrov

2022

J. Imaging

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In this paper, we detail a phase-shift implementation in a rotated plane-parallel plate (PPP). Considering the phase-shifting digital holography application, we provide a more precise phase-shift estimation based on PPP thickness, rotation, and mutual inclination of reference and object wavefronts. We show that phase retardation uncertainty implemented by the rotated PPP in a simple configuration is less than the uncertainty of a traditionally used piezoelectric translator. Physical experiments on a phase test target verify the high quality of phase reconstruction.

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Section: Discussionmentioning

confidence: 99%

Phase Retardation Analysis in a Rotated Plane-Parallel Plate for Phase-Shifting Digital Holography

Shevkunov

Petrov

2022

J. Imaging

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“…The ideal color filters would have equal sensitivity to each of the spectral components and provide a perfect separation of the three RGB sources of the corresponding wavelengths. In reality, the spectral characteristics of the sensor must be measured [55] and taken into account. In particular, the cross-talk between the color channels exist on both sides in sources and sensor color filters [38].…”

Section: Multiwavelength Object and Image Modelingmentioning

confidence: 99%

Multiwavelength Absolute Phase Retrieval from Noisy Diffractive Patterns: Wavelength Multiplexing Algorithm

et al. 2018

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We study the problem of multiwavelength absolute phase retrieval from noisy diffraction patterns. The system is lensless with multiwavelength coherent input light beams and random phase masks applied for wavefront modulation. The light beams are formed by light sources radiating all wavelengths simultaneously. A sensor equipped by a Color Filter Array (CFA) is used for spectral measurement registration. The developed algorithm targeted on optimal phase retrieval from noisy observations is based on maximum likelihood technique. The algorithm is specified for Poissonian and Gaussian noise distributions. One of the key elements of the algorithm is an original sparse modeling of the multiwavelength complex-valued wavefronts based on the complex-domain block-matching 3D filtering. Presented numerical experiments are restricted to noisy Poissonian observations. They demonstrate that the developed algorithm leads to effective solutions explicitly using the sparsity for noise suppression and enabling accurate reconstruction of absolute phase of high-dynamic range.

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“…These include measurement of the 2D modulation transfer function, 5,6 increasing the signal-to-noise ratio of registered images by using the light spatial noise portrait of the camera's sensor, 7 and increasing the noise-characteristics measurement accuracy for cameras with color filter sensors. 8 In future work, we plan to measure the noise and spectral characteristics of other cameras, including web cameras and dashboard cameras. We are also currently developing our technique for the simple measurement of spatial noise in cameras.…”

mentioning

confidence: 99%

Measuring random sensor noise in cameras

Cheremkhin¹,

Evtikhiev²,

Krasnov³

et al. 2015

SPIE Newsroom

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Pavel Arkadevich Cheremkhin received his PhD in physics in 2013 and is an assistant professor in the Department of Laser Physics. His main research interests are digital holography, camera noise, diffraction optics, wavefront reconstruction, signal processing, and analog optical links. He has more than 70 publications in journals and conferences. Vitaly Vyacheslavovich Krasnov received his PhD in physics in 2013 and is now an assistant professor in the Department of Laser Physics. His main research interests are optical encryption, diffractive optical element synthesis, wavefront reconstruction, signal processing, and camera noise. He has more than 60 publications in journals and conferences.

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A technique of measuring spectral characteristics of detector arrays in amateur and professional photocameras and their application for problems of digital holography

Cited by 10 publications

References 21 publications

Phase Retardation Analysis in a Rotated Plane-Parallel Plate for Phase-Shifting Digital Holography

Phase Retardation Analysis in a Rotated Plane-Parallel Plate for Phase-Shifting Digital Holography

Multiwavelength Absolute Phase Retrieval from Noisy Diffractive Patterns: Wavelength Multiplexing Algorithm

Measuring random sensor noise in cameras

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