Beam waist location and measurement in a dual-beam laser Doppler anemometer

Tridimas, Y; Lalor, Michael J.; Woolley, N. H.

doi:10.1088/0022-3735/11/3/009

Cited by 8 publications

(2 citation statements)

References 8 publications

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“…Measurement of the beam width at the crossing zone (Tridimas et al 1978) showed that this was 200 (*m between the l / e 2 intensity points. This gives a total fringe volume of about 6 X lo6 pm3.…”

Section: Discussionmentioning

confidence: 95%

A laser Doppler cytopherometer for measurement of electrophoretic mobility of bioparticles

Preece¹,

Luckman²

1981

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A wide-angle laser Doppler spectrometer has been combined with a number of high-field-strength cytopherometer designs for the purpose of studying the electrophoretic mobility (EPM) of biological particle and cells in non-physiological and physiological media. This produces a typical Doppler shift of 100 Hz for an EPM of 1.0 micrometers s-1 V-1 cm, and a shift-to-width ratio of greater than 10 for human erythrocytes in physiological saline. The unit uses two equal-intensity beams of identical pathlength, crossing in the measuring volume at an angle of 40--90 degrees in air and can function in either a fringe or coherent mode. The resolution for human cells and bioparticles is comparable with conventional cytopherometry but the data collection rate is many times higher.

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Section: Discussionmentioning

confidence: 95%

A laser Doppler cytopherometer for measurement of electrophoretic mobility of bioparticles

Preece¹,

Luckman²

1981

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“…The location and measurement of the beam waist was determined using a power ratio method [21] and the dimensions of the measurement volume, shown in Fig. 4, were calculated from the equations Ax = D/sinO and fly = D/cosO [22].…”

Section: Apparatusmentioning

confidence: 99%

An Advanced Apparatus for the Study of Roller and Cage Slip in High-Speed Roller Bearings

Markho

Smith

Lalor

1981

Journal of Lubrication Technology

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This paper describes a sophisticated research facility for the study of roller bearings at DN values of over one million with provisions for the measurement of such parameters as cage and roller speeds, bearing torque and load, and bearing ring temperatures. Particular features of the apparatus are a laser Doppler anemometer (LDA) system, with the ability to measure an instantaneous roller speed at any position in the bearing, an infrared radiation thermometer for measuring the bearing inner ring temperature, hydrostatic mounting of the test spindle, and aerostatic bearings which insure a good axial location of the test bearing and form important elements of torque and load measuring facilities which are, at once, integral and independent.

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Remote Laser Spectroscopy and Interferometry

1988

J Russ Laser Res

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Beam waist location and measurement in a dual-beam laser Doppler anemometer

Cited by 8 publications

References 8 publications

A laser Doppler cytopherometer for measurement of electrophoretic mobility of bioparticles

A laser Doppler cytopherometer for measurement of electrophoretic mobility of bioparticles

An Advanced Apparatus for the Study of Roller and Cage Slip in High-Speed Roller Bearings

Remote Laser Spectroscopy and Interferometry

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