scholarly journals Measurement of the Blood Velocity by a Laser-doppler System with an Optical Fiber

1980 ◽  
Vol 8 (2) ◽  
pp. 426-429 ◽  
Author(s):  
Hiroshi NISHIHARA ◽  
Yasumi NISHI ◽  
Jiro KOYAMA ◽  
Noritake HOHKI ◽  
Fumihiko KAJIYA
Keyword(s):  
Optical Fiber ◽  
Blood Velocity ◽  
Laser Doppler ◽  
Doppler System

Development of a laser doppler system for in-process evaluation of diameters on computer numerical controlled turning machines

1998 ◽  
Vol 212 (3) ◽  
pp. 183-194 ◽  
Author(s):  
T Yandayan ◽  
M Burdekin
Keyword(s):  
Scattered Light ◽  
Laser Doppler ◽  
Workpiece Surface ◽  
Cnc Turning ◽  
Tool Offset ◽  
A Value ◽  
Doppler System ◽  
Probe System ◽  
Interface Unit ◽  
Rotating Workpiece

The diameter of the workpiece is measured, while the workpiece is located on the CNC (computer numerical controlled) turning machine, using a new laser instrument and technique. The optical instrument is based on the laser Doppler principle, using an He—Ne laser as a light source. It obtains data by detecting the scattered light from the surface of a rotating workpiece, processing this data with respect to the rotation of the spindle and providing a value representing the workpiece diameter. The basic resolution of the system depends on the wavelength of the laser and geometry of the optics. Higher resolution can be achieved by obtaining the data from the workpiece surface over more than one complete revolution of the spindle. The resolution for one revolution of the spindle is 0.5μm and for ten 0.05μm. The measurement system is also integrated with the CNC turning machine, particularly for autofocusing of the instrument. The instrument is mounted on the tool holder of the CNC turning machine, which is focused by means of a tool offset parameter for non-contact measurement of each different diameter. Autofocusing is carried out using the MI5 machine tool interface unit which is already established for the Renishaw probe system, according to CNC part programming. The performance of the proposed technique and instrument is verified through the experiments.

A Double Wavelength Laser Doppler System to Investigate Skin Microcirculation

1985 ◽  
Vol BME-32 (6) ◽  
pp. 439-447 ◽  
Author(s):  
Luc Duteil ◽  
Jean Claude Bernango ◽  
Wolfgang Schalla
Keyword(s):  
Laser Doppler ◽  
Skin Microcirculation ◽  
Doppler System

Optical-fiber laser Doppler velocimeter for high-resolution measurement of pulsatile blood flows

1982 ◽  
Vol 21 (10) ◽  
pp. 1785 ◽  
Author(s):  
H. Nishihara ◽  
J. Koyama ◽  
N. Hoki ◽  
F. Kajiya ◽  
M. Hironaga ◽  
...  
Keyword(s):  
High Resolution ◽  
Optical Fiber ◽  
Fiber Laser ◽  
Laser Doppler ◽  
Laser Doppler Velocimeter ◽  
Blood Flows ◽  
High Resolution Measurement ◽  
Resolution Measurement

Laser Doppler measurement of retinal blood velocity: validity of the single scattering model

1985 ◽  
Vol 24 (5) ◽  
pp. 605 ◽  
Author(s):  
Charles E. Riva ◽  
Juan E. Grunwald ◽  
Benno L. Petrig
Keyword(s):  
Single Scattering ◽  
Blood Velocity ◽  
Laser Doppler ◽  
Doppler Measurement ◽  
Scattering Model

Differential laser Doppler system with expanded beams for velocity measurement

2013 ◽  
Vol 21 (5) ◽  
pp. 1102-1109
Author(s):  
李秀明 LI Xiu-ming ◽  
黄战华 HUANG Zhan-hua ◽  
朱猛 ZHU Meng
Keyword(s):  
Velocity Measurement ◽  
Laser Doppler ◽  
Doppler System

Dual-fiber laser doppler velocimeter and its application to the measurements of coronary blood velocity

Biorheology ◽  
1988 ◽  
Vol 25 (1-2) ◽  
pp. 227-235 ◽  
Author(s):  
F. Kajiya ◽  
O. Hiramatsu ◽  
Y. Ogasawara ◽  
K. Mito ◽  
K. Tsujioka
Keyword(s):  
Fiber Laser ◽  
Blood Velocity ◽  
Laser Doppler ◽  
Laser Doppler Velocimeter
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