Optical filter and spectrometer
AssigneeViavi Solutions Inc.
InventorsPaula SMITH, Curtis R. HRUSKA, Benjamin F. CATCHING, Paul G. COOMBS
Life of this patent
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Abstract
An optical assembly is disclosed including two laterally variable bandpass optical filters stacked at a fixed distance from each other, so that the upstream filter functions as a spatial filter for the downstream filter. The lateral displacement may cause a suppression of the oblique beam when transmission passbands at impinging locations of the oblique beam onto the upstream and downstream filters do not overlap. A photodetector array may be disposed downstream of the downstream filter. The optical assembly may be coupled via a variety of optical conduits or optical fibers for spectroscopic measurements of a flowing sample.
Claims21
1-32. (canceled)
An optical assembly comprising:
- an optical conduit;
- a first laterally variable bandpass optical filter optically coupled to a surface of the optical conduit and configured to receive signal light propagated in the optical conduit;
- a second laterally variable bandpass optical filter arranged at a distance from the first laterally variable bandpass optical filter;
- and
- a sensor coupled to the second laterally variable bandpass optical filter,
- wherein the first laterally variable bandpass optical filter has a first bandpass center wavelength,
- wherein the second laterally variable bandpass optical filter has a second bandpass center wavelength, and
- wherein the first bandpass center wavelength and the second bandpass center wavelength vary in a mutually coordinated fashion.
An optical assembly comprising:
- an elbowed optical conduit comprising a first surface, a second surface, and a third surface,
- wherein the third surface is configured to receive signal light from the first surface and reflect the signal light towards the second surface;
- a first laterally variable bandpass optical filter optically coupled to the second surface and configured to receive the signal light propagated in the elbowed optical conduit;
- a second laterally variable bandpass optical filter arranged at a distance from the first laterally variable bandpass optical filter;
- and
- a sensor coupled to the second laterally variable bandpass optical filter,
- wherein the first laterally variable bandpass optical filter has a first bandpass center wavelength, and
- wherein the second laterally variable bandpass optical filter has a second bandpass center wavelength.
An optical assembly comprising:
- an optical conduit comprising a first surface and a second surface,
- wherein the first surface is configured to optically couple to an end of an optical fiber;
- a first laterally variable bandpass optical filter optically coupled to the second surface and configured to receive signal light propagated in the optical conduit;
- a second laterally variable bandpass optical filter;
- and
- a sensor coupled to the second laterally variable bandpass optical filter,
- wherein the first laterally variable bandpass optical filter has a first bandpass center wavelength, and
- wherein the second laterally variable bandpass optical filter has a second bandpass center wavelength.
Dependencies are inferred from the claim text.