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Publication of BE709141ApublicationCriticalpatent/BE709141A/xx
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
G—PHYSICS
G01—MEASURING; TESTING
G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
G01B9/00—Measuring instruments characterised by the use of optical techniques
G01B9/02—Interferometers
G01B9/021—Interferometers using holographic techniques