US 12567554 B2 / Mar 3, 2026

Electro-optical semi-transparent photonic up-converter

A night vision optical device includes an underlying device configured to be sensitive to light in a first spectrum, and to provide output light based on absorbing light in the first spectrum. The night vision optical device further includes a stacked device overlapping the underlying device. The stacked device includes one or more openings formed in the stacked device to form one or more transparent regions which are transparent to the light in the first spectrum to allow light in the first spectrum to pass through to the underlying device. The stacked device is sensitive to light in a second spectrum. The stacked device outputs light in the first spectrum to the underlying device as a result of absorbing light in the second spectrum. Thus, the underlying device outputs light based both on light passing through the transparent regions and on light output by the stacked device.