Dielectric mirror based multispectral filter array
AssigneeViavi Solutions Inc.
InventorGeorg J. Ockenfuss
Life of this patent
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Abstract
An optical sensor device may include a set of optical sensors. The optical sensor device may include a substrate. The optical sensor device may include a multispectral filter array disposed on the substrate. The multispectral filter array may include a first dielectric mirror disposed on the substrate. The multispectral filter array may include a spacer disposed on the first dielectric mirror. The spacer may include a set of layers. The multispectral filter array may include a second dielectric mirror disposed on the spacer. The second dielectric mirror may be aligned with two or more sensor elements of a set of sensor elements.
Claims20
An optical sensor device, comprising:
- a set of optical sensors;
- a substrate;
- and
- a multispectral filter array disposed on the substrate,
- the multispectral filter array including:
- a first dielectric mirror disposed on the substrate,
- a spacer disposed on the first dielectric mirror,
- the spacer including a set of layers,
- a second dielectric mirror disposed on the spacer;
- and
- wherein the second dielectric mirror is aligned with two or more sensor elements of a set of sensor elements.
An optical filter, comprising:
- a first layer,
- the first layer being a first dielectric mirror to reflect a portion of light directed toward the first layer, and
- the first layer being deposited on a substrate associated with a set of optical sensors;
- a second set of layers,
- the second set of layers being deposited solely on the first layer, and
- the second set of layers being associated with a set of channels corresponding to a set of sensor elements,
- a channel, of the set of channels, being associated with a particular thickness corresponding to a particular wavelength of light that is to be directed toward a particular optical sensor of the set of optical sensors;
- and
- a third layer,
- the third layer being a second dielectric mirror to reflect a portion of light directed toward the third layer, and
- the third layer being deposited on a plurality of the set of sensor elements associated with the second set of layers.
A system, comprising:
- a set of optical sensors embedded into a substrate;
- and
- a multispectral filter array deposited on the substrate,
- the multispectral filter array including:
- a first dielectric mirror to partially reflect light from a light source,
- the first dielectric mirror including a first quarterwave stack of high-index and low-index layers,
- a second dielectric mirror to partially reflect light from the light source,
- the second dielectric mirror including a second quarterwave stack of high-index and low-index layers;
- and
- a plurality of high-index spacer layers disposed between the first dielectric mirror and the second dielectric mirror.
Dependencies are inferred from the claim text.