This paper proposes a new transducer for displacement measurement, which realizes proportional error measurement using a holograghic optical element (HOE) to process optical information. The principle of the transducer is analyzed theoretically. The experiment results and schematic diagram used for making the HOE are given.
"New transducer for displacement measurement", Proc. SPIE 1555, Computer and Optically Generated Holographic Optics; 4th in a Series, (1 December 1991); doi: 10.1117/12.50648; https://doi.org/10.1117/12.50648