Patent ID: 7675631

Claim:
A method of measuring a dimension and/or position of an object located in a measuring field, comprising: projecting a fan-shaped reference wave onto a holographic optical element located in font of the measuring field, the holographic optical element having a first interference pattern and a second interference pattern; forming with the first interference pattern a first parallel partial wave front from the fan-shaped reference wave, the first parallel partial wave front entering the measuring field and contacting the object; forming with the second interference pattern a second parallel partial wave front from the fan-shaped reference wave, the second parallel partial wave front entering the measuring field and contacting the object; receiving the first parallel partial wave front and the second parallel partial wave front with at least one optoelectronic converter located behind the measuring field; and determining the dimension and/or position of the object based on the first parallel partial wave front and the second parallel partial wave front received by the at least one optoelectronic converter.