Interferometers from DYNEOS AG

Our SP-Series plane-mirror miniature interferometers are designed for incorporation into customer-supplied systems and used for making precision length measurements. Their layout and operation may be readily adapted to suit specific applications. Their miniaturized sensor heads allow using them as permanently installed metrological systems. Plane mirrors or other optical-quality reflecting surfaces may be employed as reflectors on their translating arms, and may be angularly misaligned by as much as several minutes of arc without adversely affecting their operation. Their laser light sources are coupled to their sensor heads by fiberoptic cables. Their miniature interferometers convert translations of their plane mirrors along the optical axes of their probing beams into optical-interference signals that are transmitted to their optoelectronic signal-processing and power-supply units for conversion into lengths and output to external devices. System operation and display of measurement results may be via either an external display unit or a PC running an optional software package.

As an alternative of the basic system, we offer a dual- or triple-beam interferometer which combines two respectively three interferometers in a single unit. This allows making simultaneous, nanometer-precision, bi- and triaxial length measurements. Angles may be determined with high precisions from the differences between pairs of length measurements and the respective beam separations involved. The dynamic ranges for pitch and roll measurements are approximately two minutes of arc. A He‑Ne‑laser emitting an ultrastable wavelength supplies all three interferometers in order that all three length measurements will be based on the same reference length. A single fiberoptic lightguide conducts its output beam to the interferometric sensor head. Motions of the moving mirrors are converted into modulated signals that are transmitted to the electronic power-supply/ signal-processing unit. A further alternative using a prism as reflector allows bigger angle tolerance for easier adjustment of the measuring setup.