Patent ID: 11947097
Assignee: ABBERIOR INSTRUMENTS GMBH
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. The apparatus of claim 12,
wherein the beam shifting device comprises
a light guide supplying the light beam,
an optic collimating the light beam emerging from the light guide,
a first one-axis tilting mirror and a second one-axis tilting mirror which deflect the collimated light beam one after the other into two different directions,
a full mirror for the deflected light beam,
a lens combination focusing the deflected light beam perpendicularly onto the full mirror and including a lens which is rotationally symmetric with regard to a rotation axis, and
an edge mirror separating the light beam reflected by the full mirror from the light beam emerging from the light guide and collimated by the collimating optic,

wherein the bandpass filter is arranged closely in front of the full mirror and tilted to such an extent with regard to the full mirror that a component of the light beam reflected by the bandpass filter and having wavelengths outside the wavelength range selected by the bandpass filter is reflected by the bandpass filter out of the continued beam path,
wherein the light beam which has the selected wavelength range and which is reflected by the full mirror is once again collimated and de-scanned by the tilting mirrors when passing once again through the lens combination in opposite direction, and
wherein, at zero excursion of the tilting mirrors, the rotation axis of the rotationally symmetric lens is arranged relative to a beam axis at such a parallel offset that the light beam reflected by the full mirror, after passing through the lens combination, is laterally shifted with regard to the incident light beam to such an extent that it is separable from the light beam, which emerges out of the light guide and which is collimated by the collimating optic, by means of the edge mirror.