Related to Doppler laser: laser velocimeter
A technique that detects the frequency shift between the source and reflected waves of a laser, used in calculating the relative speed difference between the laser source and reflecting object.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.