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

Claim 0:
1. A bandpass filter for light having variable lower and upper cut-off wavelengths, the bandpass filter comprising
an areal long-pass filter defining the variable lower cut-off wavelength, wherein the long-pass filter has different lower cut-off wavelengths in different first area regions which follow to one another in a first direction, and
an areal short-pass filter defining the variable upper cut-off wavelength, wherein the short-pass filter has different upper cut-off wavelengths in different second area regions which follow to one another in a second direction,
wherein the long-pass filter and the short-pass filter are connected in series,
wherein the long-pass filter and the short-pass filter are spatially fixed relative to one another, and
wherein the first direction and the second direction are oriented crosswise to one another.