Patent ID: 9625255
Date: 2017-04-18
CPC Classifications: G01B,G01C,G03H

Claim:
1. A method for measuring an angle between two spatially separated elements, the method comprising: providing a multiplex hologram having multiple interference patterns, at least two interference patterns have different angles of incidence of an object light wave on a hologram plane, the angles of incidence are stored as data in a computer-readable manner; arranging the multiplex hologram in a first element plane on a first element; illuminating the multiplex hologram using a reference light wave; arranging a light detector in a second element plane on a second element; acquiring a reference light wave, which is diffracted on an interference pattern, using the light detector; forming an intensity pattern from the acquired diffracted reference light wave; assigning the computer-readable angle of incidence, which is stored as data, to the intensity pattern; and calculating an angle between the first element plane and the second element plane from the assigned angle of incidence.