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Showing 1 to 12 of 38 entries
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Influence of a skin status on the light interaction with dermis.

Biomedical optics express

Kamshilin AA, Mamontov OV, Koval VT, Zayats GA, Romashko RV.
PMID: 26600998
Biomed Opt Express. 2015 Oct 08;6(11):4326-34. doi: 10.1364/BOE.6.004326. eCollection 2015 Nov 01.

We present experimental evidence that the parameters of green light remitted from a human tissue in-vivo strongly depend on skin contact status. In case when the skin is free of any contact, simultaneous recording of imaging photoplethysmogram (iPPG) and...

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Kamshilin AA, Mamontov OV, Koval VT, et al. Influence of a skin status on the light interaction with dermis. Biomed Opt Express. 2015;6(11):4326-34doi: 10.1364/BOE.6.004326.
Kamshilin, A. A., Mamontov, O. V., Koval, V. T., Zayats, G. A., & Romashko, R. V. (2015). Influence of a skin status on the light interaction with dermis. Biomedical optics express, 6(11), 4326-34. https://doi.org/10.1364/BOE.6.004326
Kamshilin, Alexei A, et al. "Influence of a skin status on the light interaction with dermis." Biomedical optics express vol. 6,11 (2015): 4326-34. doi: https://doi.org/10.1364/BOE.6.004326
Kamshilin AA, Mamontov OV, Koval VT, Zayats GA, Romashko RV. Influence of a skin status on the light interaction with dermis. Biomed Opt Express. 2015 Oct 08;6(11):4326-34. doi: 10.1364/BOE.6.004326. eCollection 2015 Nov 01. PMID: 26600998; PMCID: PMC4646542.
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Experimental observation of optical orientation of dipolar centers.

Optics express

Grachev AI, Nippolainen E, Kamshilin AA.
PMID: 19547507
Opt Express. 2007 Sep 03;15(18):11500-6. doi: 10.1364/oe.15.011500.

We report discovery of recently predicted phenomenon, optical orientation by polar way of local centers with permanent dipole moment. In a crystal of Bi(12)SiO(20) grown in the argon atmosphere electrical current arises when the polarization of incident light is...

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Grachev AI, Nippolainen E, Kamshilin AA. Experimental observation of optical orientation of dipolar centers. Opt Express. 2007;15(18):11500-6doi: 10.1364/oe.15.011500.
Grachev, A. I., Nippolainen, E., & Kamshilin, A. A. (2007). Experimental observation of optical orientation of dipolar centers. Optics express, 15(18), 11500-6. https://doi.org/10.1364/oe.15.011500
Grachev, Alexander I, et al. "Experimental observation of optical orientation of dipolar centers." Optics express vol. 15,18 (2007): 11500-6. doi: https://doi.org/10.1364/oe.15.011500
Grachev AI, Nippolainen E, Kamshilin AA. Experimental observation of optical orientation of dipolar centers. Opt Express. 2007 Sep 03;15(18):11500-6. doi: 10.1364/oe.15.011500. PMID: 19547507.
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Photoplethysmographic imaging of high spatial resolution.

Biomedical optics express

Kamshilin AA, Miridonov S, Teplov V, Saarenheimo R, Nippolainen E.
PMID: 21483621
Biomed Opt Express. 2011 Mar 29;2(4):996-1006. doi: 10.1364/BOE.2.000996.

We present a new method of formation photoplethysmographic images with high spatial resolution from video recordings of a living body in the reflection geometry. The method (patent pending) is based on lock-in amplification of every pixel of the recorded...

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Kamshilin AA, Miridonov S, Teplov V, et al. Photoplethysmographic imaging of high spatial resolution. Biomed Opt Express. 2011;2(4):996-1006doi: 10.1364/BOE.2.000996.
Kamshilin, A. A., Miridonov, S., Teplov, V., Saarenheimo, R., & Nippolainen, E. (2011). Photoplethysmographic imaging of high spatial resolution. Biomedical optics express, 2(4), 996-1006. https://doi.org/10.1364/BOE.2.000996
Kamshilin, Alexei A, et al. "Photoplethysmographic imaging of high spatial resolution." Biomedical optics express vol. 2,4 (2011): 996-1006. doi: https://doi.org/10.1364/BOE.2.000996
Kamshilin AA, Miridonov S, Teplov V, Saarenheimo R, Nippolainen E. Photoplethysmographic imaging of high spatial resolution. Biomed Opt Express. 2011 Mar 29;2(4):996-1006. doi: 10.1364/BOE.2.000996. PMID: 21483621; PMCID: PMC3072138.
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Electrophotochromic gratings in photorefractive Bi(12)TiO(20) crystals.

Applied optics

Kamshilin AA, Frejlich J, Garcia PM.
PMID: 20720819
Appl Opt. 1992 Apr 10;31(11):1787-93. doi: 10.1364/AO.31.001787.

We present the first experimental demonstration of quasi-permanent holographic recordings in Bi(12)TiO(20) crystals through what is to our knowledge a new electrophotochromic effect. This arises from spatial redistribution of some centers that are different from photorefractive centers. Light diffracted...

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Kamshilin AA, Frejlich J, Garcia PM. Electrophotochromic gratings in photorefractive Bi(12)TiO(20) crystals. Appl Opt. 1992;31(11):1787-93doi: 10.1364/AO.31.001787.
Kamshilin, A. A., Frejlich, J., & Garcia, P. M. (1992). Electrophotochromic gratings in photorefractive Bi(12)TiO(20) crystals. Applied optics, 31(11), 1787-93. https://doi.org/10.1364/AO.31.001787
Kamshilin, A A, et al. "Electrophotochromic gratings in photorefractive Bi(12)TiO(20) crystals." Applied optics vol. 31,11 (1992): 1787-93. doi: https://doi.org/10.1364/AO.31.001787
Kamshilin AA, Frejlich J, Garcia PM. Electrophotochromic gratings in photorefractive Bi(12)TiO(20) crystals. Appl Opt. 1992 Apr 10;31(11):1787-93. doi: 10.1364/AO.31.001787. PMID: 20720819.
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Accurate measurement of the pulse wave delay with imaging photoplethysmography.

Biomedical optics express

Kamshilin AA, Sidorov IS, Babayan L, Volynsky MA, Giniatullin R, Mamontov OV.
PMID: 28018731
Biomed Opt Express. 2016 Nov 16;7(12):5138-5147. doi: 10.1364/BOE.7.005138. eCollection 2016 Dec 01.

Assessment of the cardiovascular parameters using noncontact video-based or imaging photoplethysmography (IPPG) is usually considered as inaccurate because of strong influence of motion artefacts. To optimize this technique we performed a simultaneous recording of electrocardiogram and video frames of...

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Kamshilin AA, Sidorov IS, Babayan L, et al. Accurate measurement of the pulse wave delay with imaging photoplethysmography. Biomed Opt Express. 2016;7(12):5138-5147doi: 10.1364/BOE.7.005138.
Kamshilin, A. A., Sidorov, I. S., Babayan, L., Volynsky, M. A., Giniatullin, R., & Mamontov, O. V. (2016). Accurate measurement of the pulse wave delay with imaging photoplethysmography. Biomedical optics express, 7(12), 5138-5147. https://doi.org/10.1364/BOE.7.005138
Kamshilin, Alexei A, et al. "Accurate measurement of the pulse wave delay with imaging photoplethysmography." Biomedical optics express vol. 7,12 (2016): 5138-5147. doi: https://doi.org/10.1364/BOE.7.005138
Kamshilin AA, Sidorov IS, Babayan L, Volynsky MA, Giniatullin R, Mamontov OV. Accurate measurement of the pulse wave delay with imaging photoplethysmography. Biomed Opt Express. 2016 Nov 16;7(12):5138-5147. doi: 10.1364/BOE.7.005138. eCollection 2016 Dec 01. PMID: 28018731; PMCID: PMC5175558.
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Theory of photorefractive vectorial wave coupling in cubic crystals.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

Sturman BI, Podivilov EV, Ringhofer KH, Shamonina E, Kamenov VP, Nippolainen E, Prokofiev VV, Kamshilin AA.
PMID: 11970148
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999 Sep;60(3):3332-52. doi: 10.1103/physreve.60.3332.

We present an analytical theory of vectorial wave coupling in photorefractive cubic crystals which are, in general, optically active. The theory is based on the systematic use of the spatial symmetry properties and the apparatus of the Pauli operators...

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Sturman BI, Podivilov EV, Ringhofer KH, et al. Theory of photorefractive vectorial wave coupling in cubic crystals. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999;60(3):3332-52doi: 10.1103/physreve.60.3332.
Sturman, B. I., Podivilov, E. V., Ringhofer, K. H., Shamonina, E., Kamenov, V. P., Nippolainen, E., Prokofiev, V. V., & Kamshilin, A. A. (1999). Theory of photorefractive vectorial wave coupling in cubic crystals. Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 60(3), 3332-52. https://doi.org/10.1103/physreve.60.3332
Sturman, B I, et al. "Theory of photorefractive vectorial wave coupling in cubic crystals." Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics vol. 60,3 (1999): 3332-52. doi: https://doi.org/10.1103/physreve.60.3332
Sturman BI, Podivilov EV, Ringhofer KH, Shamonina E, Kamenov VP, Nippolainen E, Prokofiev VV, Kamshilin AA. Theory of photorefractive vectorial wave coupling in cubic crystals. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999 Sep;60(3):3332-52. doi: 10.1103/physreve.60.3332. PMID: 11970148.
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Photorefractive light scattering families in (111)-cut Bi12TiO20 crystals with an external electric ac field.

Physical review. E, Statistical, nonlinear, and soft matter physics

Kamenov VP, Shamonina E, Ringhofer KH, Nippolainen E, Prokofiev VV, Kamshilin AA.
PMID: 11304378
Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Jan;63(1):016607. doi: 10.1103/PhysRevE.63.016607. Epub 2000 Dec 20.

We investigate here both theoretically and experimentally light-induced scattering in (111)-cut Bi12TiO20 crystals with an external ac field. Our simple analytic solution, which is nearly as precise as the numeric one, allows us to recognize the following otherwise hidden...

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Kamenov VP, Shamonina E, Ringhofer KH, et al. Photorefractive light scattering families in (111)-cut Bi12TiO20 crystals with an external electric ac field. Phys Rev E Stat Nonlin Soft Matter Phys. 2000;63(1):016607doi: 10.1103/PhysRevE.63.016607.
Kamenov, V. P., Shamonina, E., Ringhofer, K. H., Nippolainen, E., Prokofiev, V. V., & Kamshilin, A. A. (2001). Photorefractive light scattering families in (111)-cut Bi12TiO20 crystals with an external electric ac field. Physical review. E, Statistical, nonlinear, and soft matter physics, 63(1), 016607. https://doi.org/10.1103/PhysRevE.63.016607
Kamenov, V P, et al. "Photorefractive light scattering families in (111)-cut Bi12TiO20 crystals with an external electric ac field." Physical review. E, Statistical, nonlinear, and soft matter physics vol. 63,1 (2001): 016607. doi: https://doi.org/10.1103/PhysRevE.63.016607
Kamenov VP, Shamonina E, Ringhofer KH, Nippolainen E, Prokofiev VV, Kamshilin AA. Photorefractive light scattering families in (111)-cut Bi12TiO20 crystals with an external electric ac field. Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Jan;63(1):016607. doi: 10.1103/PhysRevE.63.016607. Epub 2000 Dec 20. PMID: 11304378.
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Contactless Assessment of Cerebral Autoregulation by Photoplethysmographic Imaging at Green Illumination.

Frontiers in neuroscience

Lyubashina OA, Mamontov OV, Volynsky MA, Zaytsev VV, Kamshilin AA.
PMID: 31798408
Front Neurosci. 2019 Nov 13;13:1235. doi: 10.3389/fnins.2019.01235. eCollection 2019.

Accurate and practical assessment of the brain circulation is needed to adequately estimate the viability of cerebral blood flow regulatory mechanisms in various physiological conditions. The objective of our study was to examine feasibility of the contactless green-light imaging...

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Lyubashina OA, Mamontov OV, Volynsky MA, et al. Contactless Assessment of Cerebral Autoregulation by Photoplethysmographic Imaging at Green Illumination. Front Neurosci. 2019;13:1235doi: 10.3389/fnins.2019.01235.
Lyubashina, O. A., Mamontov, O. V., Volynsky, M. A., Zaytsev, V. V., & Kamshilin, A. A. (2019). Contactless Assessment of Cerebral Autoregulation by Photoplethysmographic Imaging at Green Illumination. Frontiers in neuroscience, 131235. https://doi.org/10.3389/fnins.2019.01235
Lyubashina, Olga A, et al. "Contactless Assessment of Cerebral Autoregulation by Photoplethysmographic Imaging at Green Illumination." Frontiers in neuroscience vol. 13 (2019): 1235. doi: https://doi.org/10.3389/fnins.2019.01235
Lyubashina OA, Mamontov OV, Volynsky MA, Zaytsev VV, Kamshilin AA. Contactless Assessment of Cerebral Autoregulation by Photoplethysmographic Imaging at Green Illumination. Front Neurosci. 2019 Nov 13;13:1235. doi: 10.3389/fnins.2019.01235. eCollection 2019. PMID: 31798408; PMCID: PMC6863769.
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Two-wave mixing of phase-modulated beams in GaP under a dc electric field.

Optics letters

Kamshilin AA, Nazhestkina NI, Kobozev OV, Jaaskelainen T.
PMID: 18040374
Opt Lett. 2001 Apr 15;26(8):527-9. doi: 10.1364/ol.26.000527.

Two-wave mixing of phase-modulated light beams in crystals of cubic symmetry is analyzed on the basis of the vectorial theory of light diffraction. We derive an analytical expression for phase-to-intensity transformation in crystals of the 43m point group of...

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Kamshilin AA, Nazhestkina NI, Kobozev OV, et al. Two-wave mixing of phase-modulated beams in GaP under a dc electric field. Opt Lett. 2001;26(8):527-9doi: 10.1364/ol.26.000527.
Kamshilin, A. A., Nazhestkina, N. I., Kobozev, O. V., & Jaaskelainen, T. (2001). Two-wave mixing of phase-modulated beams in GaP under a dc electric field. Optics letters, 26(8), 527-9. https://doi.org/10.1364/ol.26.000527
Kamshilin, A A, et al. "Two-wave mixing of phase-modulated beams in GaP under a dc electric field." Optics letters vol. 26,8 (2001): 527-9. doi: https://doi.org/10.1364/ol.26.000527
Kamshilin AA, Nazhestkina NI, Kobozev OV, Jaaskelainen T. Two-wave mixing of phase-modulated beams in GaP under a dc electric field. Opt Lett. 2001 Apr 15;26(8):527-9. doi: 10.1364/ol.26.000527. PMID: 18040374.
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Fast distance measurements by use of dynamic speckles.

Optics letters

Semenov DV, Nippolainen E, Kamshilin AA.
PMID: 15751874
Opt Lett. 2005 Feb 01;30(3):248-50. doi: 10.1364/ol.30.000248.

A technique for fast measurements of the distance to an object's surface based on spatial filtering of dynamic speckle patterns is proposed. Exploitation of two spatial filters (Ronchi rulings) enables measurements to be independent of surface speed. Experimental verification...

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Semenov DV, Nippolainen E, Kamshilin AA. Fast distance measurements by use of dynamic speckles. Opt Lett. 2005;30(3):248-50doi: 10.1364/ol.30.000248.
Semenov, D. V., Nippolainen, E., & Kamshilin, A. A. (2005). Fast distance measurements by use of dynamic speckles. Optics letters, 30(3), 248-50. https://doi.org/10.1364/ol.30.000248
Semenov, Dmitry V, et al. "Fast distance measurements by use of dynamic speckles." Optics letters vol. 30,3 (2005): 248-50. doi: https://doi.org/10.1364/ol.30.000248
Semenov DV, Nippolainen E, Kamshilin AA. Fast distance measurements by use of dynamic speckles. Opt Lett. 2005 Feb 01;30(3):248-50. doi: 10.1364/ol.30.000248. PMID: 15751874.
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Electric polarization induced by optical orientation of dipolar centers in non-polar piezoelectrics.

Optics express

Grachev A, Kamshilin A.
PMID: 19498886
Opt Express. 2005 Oct 17;13(21):8565-70. doi: 10.1364/opex.13.008565.

We predict new nonlinear optical phenomenon, static electric polarization induced in non-polar piezoelectric by linearly polarized light owing to orientation of the impurity centers with permanent dipole moment. Microscopic model of this effect for the crystals of cubic symmetry...

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Grachev A, Kamshilin A. Electric polarization induced by optical orientation of dipolar centers in non-polar piezoelectrics. Opt Express. 2005;13(21):8565-70doi: 10.1364/opex.13.008565.
Grachev, A., & Kamshilin, A. (2005). Electric polarization induced by optical orientation of dipolar centers in non-polar piezoelectrics. Optics express, 13(21), 8565-70. https://doi.org/10.1364/opex.13.008565
Grachev, Alexander, and Kamshilin, Alexei. "Electric polarization induced by optical orientation of dipolar centers in non-polar piezoelectrics." Optics express vol. 13,21 (2005): 8565-70. doi: https://doi.org/10.1364/opex.13.008565
Grachev A, Kamshilin A. Electric polarization induced by optical orientation of dipolar centers in non-polar piezoelectrics. Opt Express. 2005 Oct 17;13(21):8565-70. doi: 10.1364/opex.13.008565. PMID: 19498886.
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Recovery of reflection spectra in a multispectral imaging system with light emitting diodes.

Optics express

Fauch L, Nippolainen E, Teplov V, Kamshilin AA.
PMID: 21164681
Opt Express. 2010 Oct 25;18(22):23394-405. doi: 10.1364/OE.18.023394.

Performance of recently proposed multispectral imaging system for fast acquisition of two dimensional distribution of reflectance spectrum is experimentally studied. The system operation is based on a subspace vector model in which any reflectance spectrum is described in the...

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Fauch L, Nippolainen E, Teplov V, et al. Recovery of reflection spectra in a multispectral imaging system with light emitting diodes. Opt Express. 2010;18(22):23394-405doi: 10.1364/OE.18.023394.
Fauch, L., Nippolainen, E., Teplov, V., & Kamshilin, A. A. (2010). Recovery of reflection spectra in a multispectral imaging system with light emitting diodes. Optics express, 18(22), 23394-405. https://doi.org/10.1364/OE.18.023394
Fauch, Laure, et al. "Recovery of reflection spectra in a multispectral imaging system with light emitting diodes." Optics express vol. 18,22 (2010): 23394-405. doi: https://doi.org/10.1364/OE.18.023394
Fauch L, Nippolainen E, Teplov V, Kamshilin AA. Recovery of reflection spectra in a multispectral imaging system with light emitting diodes. Opt Express. 2010 Oct 25;18(22):23394-405. doi: 10.1364/OE.18.023394. PMID: 21164681.
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Showing 1 to 12 of 38 entries