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An acousto-optical sensor with high angular resolution.

Kaloshin G, Lukin I - Sensors (Basel) (2012)

Bottom Line: The paper introduces a new laser interferometry-based sensor for diagnosis of random media by means of high accuracy angle measurements and describes the results of its development and testing.Theoretical calculations of the dependence of the range of the laser interferometer on laser beam parameters, device geometry, and atmospheric turbulence characteristics are reported.It is demonstrated that at moderate turbulence intensities corresponding to those observed most frequently in turbulent atmosphere at moderate latitudes and with low interference contrast values, the performance range of the laser interferometer-based device exceeds 5 km.

View Article: PubMed Central - PubMed

Affiliation: VE Zuev Institute of Atmospheric Optics SB RAS, Tomsk, Russia. gkaloshin@iao.ru

ABSTRACT
The paper introduces a new laser interferometry-based sensor for diagnosis of random media by means of high accuracy angle measurements and describes the results of its development and testing. Theoretical calculations of the dependence of the range of the laser interferometer on laser beam parameters, device geometry, and atmospheric turbulence characteristics are reported. It is demonstrated that at moderate turbulence intensities corresponding to those observed most frequently in turbulent atmosphere at moderate latitudes and with low interference contrast values, the performance range of the laser interferometer-based device exceeds 5 km.

No MeSH data available.


Related in: MedlinePlus

Nomograms used for the selection of initial values of laser beam parameters and spacing of their optical axes: function f1(x) for a choice of initial values of beams radiuses: curves 1–8 (a); functions f2(x) and f3(x) for a choice of size of spatial diversion their optical axes (b): f2(x)–the bottom group of solid curves 1–8; f3(x)–the top group of curves of different linestyles 1–8.
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f2-sensors-12-03739: Nomograms used for the selection of initial values of laser beam parameters and spacing of their optical axes: function f1(x) for a choice of initial values of beams radiuses: curves 1–8 (a); functions f2(x) and f3(x) for a choice of size of spatial diversion their optical axes (b): f2(x)–the bottom group of solid curves 1–8; f3(x)–the top group of curves of different linestyles 1–8.

Mentions: Figure 2(a) shows plots of the function:f1(x)=−ln[ν(x)]π [ρ0−23+ρk−24]−1/2,for different values of parameters of the problem. Curves 1, 2, and 3 demonstrate the influence of optical radiation wavelength λ on function f1(x): 1 – λ = 0.51, 2 – 0.63, and 3 – 1.06 μm (other parameters are as follows: ρk = 2 cm, v(x) = 0.1, Cε2 = 10−13 m−2/3); curves 3, 4, and 5 demonstrate sensitivity of f1(x) to the contrast of the interference pattern v(x): 3 – v(x) = 0.1, 4 – 0.3, 5 – 0.5 (in this case, λ = 1.06 μm, ρk = 2 cm, Cε2 = 10−13 m−2/3), while curves 3, 6, 7, and 8 show the dependence of f1(x) on the level of dielectric permittivity fluctuations in turbulent atmosphere Cε2: 3 – Cε2 = 10−13 m−2/3, 6 – 10−14, 7 – 10−15, 8 – 10−16 m−2/3 (λ = 1.06 μm, ρk = 2 cm, v(x) = 0.1). It appears that in order for condition (9) to be satisfied with the path length range 1 m to 10 km, the initial radii of the laser beams a0 must not exceed 1…2 mm.


An acousto-optical sensor with high angular resolution.

Kaloshin G, Lukin I - Sensors (Basel) (2012)

Nomograms used for the selection of initial values of laser beam parameters and spacing of their optical axes: function f1(x) for a choice of initial values of beams radiuses: curves 1–8 (a); functions f2(x) and f3(x) for a choice of size of spatial diversion their optical axes (b): f2(x)–the bottom group of solid curves 1–8; f3(x)–the top group of curves of different linestyles 1–8.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3376619&req=5

f2-sensors-12-03739: Nomograms used for the selection of initial values of laser beam parameters and spacing of their optical axes: function f1(x) for a choice of initial values of beams radiuses: curves 1–8 (a); functions f2(x) and f3(x) for a choice of size of spatial diversion their optical axes (b): f2(x)–the bottom group of solid curves 1–8; f3(x)–the top group of curves of different linestyles 1–8.
Mentions: Figure 2(a) shows plots of the function:f1(x)=−ln[ν(x)]π [ρ0−23+ρk−24]−1/2,for different values of parameters of the problem. Curves 1, 2, and 3 demonstrate the influence of optical radiation wavelength λ on function f1(x): 1 – λ = 0.51, 2 – 0.63, and 3 – 1.06 μm (other parameters are as follows: ρk = 2 cm, v(x) = 0.1, Cε2 = 10−13 m−2/3); curves 3, 4, and 5 demonstrate sensitivity of f1(x) to the contrast of the interference pattern v(x): 3 – v(x) = 0.1, 4 – 0.3, 5 – 0.5 (in this case, λ = 1.06 μm, ρk = 2 cm, Cε2 = 10−13 m−2/3), while curves 3, 6, 7, and 8 show the dependence of f1(x) on the level of dielectric permittivity fluctuations in turbulent atmosphere Cε2: 3 – Cε2 = 10−13 m−2/3, 6 – 10−14, 7 – 10−15, 8 – 10−16 m−2/3 (λ = 1.06 μm, ρk = 2 cm, v(x) = 0.1). It appears that in order for condition (9) to be satisfied with the path length range 1 m to 10 km, the initial radii of the laser beams a0 must not exceed 1…2 mm.

Bottom Line: The paper introduces a new laser interferometry-based sensor for diagnosis of random media by means of high accuracy angle measurements and describes the results of its development and testing.Theoretical calculations of the dependence of the range of the laser interferometer on laser beam parameters, device geometry, and atmospheric turbulence characteristics are reported.It is demonstrated that at moderate turbulence intensities corresponding to those observed most frequently in turbulent atmosphere at moderate latitudes and with low interference contrast values, the performance range of the laser interferometer-based device exceeds 5 km.

View Article: PubMed Central - PubMed

Affiliation: VE Zuev Institute of Atmospheric Optics SB RAS, Tomsk, Russia. gkaloshin@iao.ru

ABSTRACT
The paper introduces a new laser interferometry-based sensor for diagnosis of random media by means of high accuracy angle measurements and describes the results of its development and testing. Theoretical calculations of the dependence of the range of the laser interferometer on laser beam parameters, device geometry, and atmospheric turbulence characteristics are reported. It is demonstrated that at moderate turbulence intensities corresponding to those observed most frequently in turbulent atmosphere at moderate latitudes and with low interference contrast values, the performance range of the laser interferometer-based device exceeds 5 km.

No MeSH data available.


Related in: MedlinePlus