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US 10,378,955 B2Granted
Spectroscopic assembly and method
AssigneeViavi Solutions Inc.
InventorGeorg J. Ockenfuss
Life of this patent
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Abstract
A spectrometer assembly is provided having an optical transmission filter including a stack of continuous, non-patterned alternating dielectric and metal layers. Angle-dependent transmission wavelength shift of the optical transmission filter with continuous metal layers is small e.g. in comparison with multilayer dielectric filters, facilitating size reduction of the spectrometer assembly.
Claims20
A sensor comprising:
- a first signal filter for transmitting a first portion of a signal light at a first signal transmission wavelength, while blocking excitation light,
- wherein the first signal filter includes:
- a first area including first continuous, non-micro-structured metal layers and first dielectric layers stacked in alternation, and
- a second area consisting of a stack of additional dielectric layers, and
- wherein an angular sensitivity of the first signal transmission wavelength is less, for the first signal filter, as compared to a signal filter including micro-structured metal layers.
2 more elements
A method comprising:
- transmitting, using a signal filter, a portion of signal light, emitted from a sample, at a signal transmission wavelength,
- wherein the signal filter includes:
- a first area including continuous, non-micro-structured metal layers and dielectric layers stacked in alternation, and
- a second area consisting of a stack of additional dielectric layers.
1 more element
A sensor comprising:
- a transmission optical filter including:
- a first area including continuous, non-microstructured metal layers and dielectric layers stacked in alternation, and
- a second area consisting of a stack of additional dielectric layers,
- wherein the transmission optical filter discriminates between an excitation wavelength and a signal wavelength, and
- wherein an angular dependence of a transmission wavelength of the transmission optical filter is less than another angular dependence of another transmission wavelength of another transmission optical filter that includes micro-structured metal layers.
2 more elements
Dependencies are inferred from the claim text.