Sensor window
AssigneeViavi Solutions Inc.
InventorsGeorg J. OCKENFUSS, Scott ROWLANDS, Markus BILGER
Life of this patent
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Abstract
A sensor window may include a substrate and a set of layers disposed onto the substrate. The set of layers may include a first subset of layers of a first refractive index and a second set of layers of a second refractive index different from the first refractive index. The set of layers may be associated with a threshold transmissivity in a sensing spectral range. The set of layers may be configured to a particular color in a visible spectral range and may be associated with a threshold opacity in the visible spectral range.
Claims20
An optical filter, comprising:
- a sensor window configured to provide:
- a transmissivity of less than 5% between approximately 400 nm and approximately 780 nm;
- and
- a reflectance of less than 10% in a visible spectral range;
- and
- a blocker configured to block transmission at less than approximately 1000 nm.
An optical filter, comprising:
- a sensor window configured to provide:
- a transmissivity of less than 50% between approximately 400 nm and approximately 850 nm and is greater than 95% at approximately 940 nm;
- and
- a reflectance of less than 10% in a visible spectral range.
An optical filter, comprising:
- a sensor window configured to provide:
- a transmissivity of less than 50% between approximately 400 nm and approximately 800 nm and is greater than 85% at approximately 940 nm;
- and
- a reflectance of less than 12% in a part of a visible spectral range.
Dependencies are inferred from the claim text.