An acousto-optical imaging spectrophotometer for astrophysical observations

Molchanov, V. N.; Lyuty, V. M.; Есипов, В. Ф.; Anikin, Sergey P.; Makarov, O. Yu.; Solodovnikov, N. P.

doi:10.1134/1.1512228

Cited by 29 publications

(8 citation statements)

References 13 publications

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“…[23][24][25] Furthermore, one can take the other data from the recently obtained results 10 with calomel AOF (the spectral resolution was δλ ≈ 0.235 Å at 405 nm, which gives a resolving power R ≈ 17;200). The obtained results with the developed calomel AOC (the spectral resolution δλ M ≈ 0.205 Å at 405 nm, which gives the resolving power exceeding R M ¼ 19;800 with the spectral bandwidth Δλ M ≈ 140.0 Å) have a gain compared with the most advanced to our knowledge, acousto-optical spectrometers for space or airborne operations of the twenty-first century.…”

Section: Resultsmentioning

confidence: 99%

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Calomel-made crystalline acousto-optical cell designed for an advanced regime of noncollinear two-phonon light scattering

Shcherbakov

Arellanes

2016

Opt. Eng

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Calomel-made crystalline acousto-optical cell designed for an advanced regime of noncollinear two-phonon light scattering," Opt. Eng. 55(3), 037107 (2016), Abstract. We study the potentials of a wide-aperture crystalline calomel-made acousto-optical cell. Characterizing this cell is nontrivial due to the chosen regime based on an advanced noncollinear two-phonon light scattering. Recently revealed important features of this phenomenon are essentially exploited in the cell and are investigated in more detail. These features can be observed more easily and simply in tetragonal crystals, e.g., calomel, exhibiting specific acousto-optical nonlinearity caused by the acoustic waves of finite amplitude. This parametric nonlinearity manifests itself at low acoustic powers in calomel possessing linear acoustic attenuation. The formerly identified additional degree of freedom, unique to this regime, is exploited for designing the cell with an eye to doubling the resolution due to two-phonon processes. We clarify the role of varying the central acoustic frequency and acoustic attenuation using that degree of freedom. Then the efficiency of calomel is exploited to expand the cell's bandwidth with a cost of its efficiency. Proof-of-principle experiments confirm the developed approaches and illustrate their applicability to innovative techniques of optical spectrum analysis with the improved resolution. The achieved spectral resolution of 0.205 Å at 405 nm and the resolving power 19,800 are the best for acousto-optical spectrometers dedicated to space or airborne operations to date as far as we know. Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 06/25/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Optical Engineering 037107-2 March 2016 • Vol. 55(3) Shcherbakov and Arellanes: Calomel-made crystalline acousto-optical cell designed for an advanced regime. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 06/25/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Shcherbakov and Arellanes: Calomel-made crystalline acousto-optical cell designed for an advanced regime. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 06/25/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx Optical Engineering 037107-12 March 2016 • Vol. 55(3) Shcherbakov and Arellanes: Calomel-made crystalline acousto-optical cell designed for an advanced regime. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 06/25/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx

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Section: Resultsmentioning

confidence: 99%

“…[23][24][25] Consider that the use of this new technique would give us the option to quantify the abundances of different elements and would be less affected by line blending, such as Li, Fe, O, or Na, 26 for example. For instance, this resolution exceeds all the previous AO spectrometers in the literature.…”

Section: Resultsmentioning

confidence: 99%

Calomel-made crystalline acousto-optical cell designed for an advanced regime of noncollinear two-phonon light scattering

Shcherbakov

Arellanes

2016

Opt. Eng

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“…In contrast to previously reported acousto-optic HSI systems, 10,11,29,30,38,39,41 our schemes are based on a spatial filter and a single AOTF as a monochromator in the detection part of the optical scheme. Lower spatial frequencies at jkj < k min are blocked by the mask, resulting in suppression of uniform background in the image.…”

Section: Methodsmentioning

confidence: 98%

Hyperspectral imaging acousto-optic system with spatial filtering for optical phase visualization

Yushkov

Molchanov

2017

J. Biomed. Opt

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We report a method for phase visualization in the images of transparent specimens using analog image processing in incoherent light. The experimental technique is based on adaptive bandpass spatial filtering with an amplitude mask matched with an acousto-optic tunable filter in a telecentric optical system. We demonstrate the processing of microscopic images of unstained and stained histological sections of human thyroid tumor with improved contrast.

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“…1,2 Acousto-optic tunable filters (AOTFs) are a kind of adaptive dispersive device commonly used for HSI. [3][4][5][6][7][8][9][10][11][12] Transmitted wavelength at the output of an AOTF depends on the frequency of the controlling RF signal. Purely electronic tuning with a switching time on the order of 10 μs and the absence of moving parts makes AOTFs suitable for real-time operation.…”

Section: Introductionmentioning

confidence: 99%

Contrast enhancement in microscopy of human thyroid tumors by means of acousto-optic adaptive spatial filtering

et al. 2016

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We report a method for edge enhancement in the images of transparent samples using analog image processing in coherent light. The experimental technique is based on adaptive spatial filtering with an acoustooptic tunable filter in a telecentric optical system. We demonstrate processing of microscopic images of unstained and stained histological sections of human thyroid tumor with improved contrast.

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An acousto-optical imaging spectrophotometer for astrophysical observations

Cited by 29 publications

References 13 publications

Calomel-made crystalline acousto-optical cell designed for an advanced regime of noncollinear two-phonon light scattering

Calomel-made crystalline acousto-optical cell designed for an advanced regime of noncollinear two-phonon light scattering

Hyperspectral imaging acousto-optic system with spatial filtering for optical phase visualization

Contrast enhancement in microscopy of human thyroid tumors by means of acousto-optic adaptive spatial filtering

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