Optical filter and spectrometer
AssigneeViavi Solutions Inc.
InventorsPaula Smith, Curtis R. Hruska, Benjamin F. Catching, Paul G. Coombs
Life of this patent
Estimating the term…
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
An assembly comprising:
- a light source;
- a cell comprising:
- an inlet configured to receive a sample in fluid form,
- wherein the light source is configured to provide illuminating light directly to the cell,
- a cavity, in fluid communication with the inlet, configured to receive and contain the sample in fluid form while transmitting the illuminating light,
- wherein the inlet and the cavity are aligned along a single axis, and
- an outlet, in fluid communication with the cavity, configured to output the sample in fluid form after the sample in fluid form is illuminated by the illuminating light;
- an optical assembly that includes an optical filter;
- and
- a sensor, coupled to the optical filter, configured to selectively detect signal light propagated through the optical filter, wherein the signal light is emitted by the sample in fluid form while the sample in fluid form is in the cavity.
An assembly comprising:
- a light source configured to provide illuminating light;
- a cell comprising:
- an inlet,
- a cavity configured to receive and contain a sample while transmitting the illuminating light through the cell,
- wherein the inlet and the cavity are aligned along a single axis, and an outlet, and
- wherein the light source is between the inlet and the outlet;
- an optical filter;
- and
- a sensor, coupled to the optical filter, configured to selectively detect signal light propagated through the optical filter,
- wherein the signal light is emitted by the sample while the sample is in the cavity.
An assembly comprising:
- a light source;
- a cell comprising:
- an inlet,
- a cavity configured to receive and contain a sample while transmitting illuminating light from the light source,
- wherein the inlet and the cavity are aligned along a first axis, and
- wherein the light source and the cavity are along a second axis that intersects perpendicularly with the first axis, and
- an outlet;
- an optical filter;
- and
- a sensor, coupled to the optical filter, configured to selectively detect signal light propagated through the optical filter,
- wherein the signal light is emitted by the sample while the sample is in the cavity.
Dependencies are inferred from the claim text.