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Title
Faseroptisches Laser-Speckle-Interferometer
Date Issued
1998
Author(s)
Hoefling, R.
Aswendt, P.
Patent No
1997-19714157
Abstract
The interferometer has a mobile measurement head with a CCD camera which can be connected to an image processor. The measurement head (1) contains a fibre optical beam divider which divides light from a laser received via a monomode optical fibre between two monomode fibres. The fibres ends can be fixed to a measurement head holder at a lateral distance from the CCD camera so that the light emanating from the ends falls on the object at an acute angle to the camera's optical axis. A module (22) which can be added to the camera lens (9) has a beam divider (23) in the observation beam path and a diffuser plate (24) parallel to the camera axis. An adjuster (20) on the measurement head can orient the end (16) of one fibre whilst maintaining the source point position. The emanating light falls on the diffuser plate and can be coupled by the beam divider into the observation beam path as transmitted scattered light ADVANTAGE - Enables in-plane and out-of-plane measurements with relatively hi gh sensitivity.
Language
de
Patenprio
DE 1997-19714157 A: 19970405