A digital holography setup with pulsed illumination is used to capture GUWs traveling on the object surface, which are excited by a piezo actuator on the back of the sample. The illumination is adapted to the FOV by a lens and an aperture, the neutral density (ND) filter is used to control the brightness. Part of the light is then reflected by a mirror to provide the reference wave $r\left(\vec{x}\right)$, where the mirror is slightly tilted to perform spatial phase shifting. The rest of the light is scattered at the object surface and constitutes the object wave $u\left(\vec{x}\right)$ . The interference of $r\left(\vec{x}\right)$ and $u\left(\vec{x}\right)$ is then measured with a CMOS sensor and numerically propagated in order to obtain information about the out-of-plane displacement caused by the GUW.