Patent ID: 11895400
Assignee: LUMILEDS, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 15:
16. An imaging device, comprising:
an imaging lens configured to form an image of a scene using infrared light reflected from the scene and visible light that is reflected from the scene or emitted by the scene;
a filter configured to partially attenuate the infrared light reflected from the scene, the filter including a first area that is substantially transparent to infrared light and substantially transparent to visible light, the first area includes a plurality of subareas that do not adjoin one another, the filter further including a second area that is substantially opaque to infrared light and substantially transparent to visible light, each subarea being surrounded by the second area, the imaging lens defining a central axis that extends through the second area of the filter, the subareas being equidistant from the central axis;
a detector positioned to detect the image, the detector including detector pixels that are grouped into pairs, each pair of detector pixels configured to produce signals that are summed together to produce data representing a single pixel of the image; and
an autofocus motor configured to adjust a spacing between the imaging lens and the detector such that the image is formed in a plane of the detector, the autofocus motor configured to adjust the spacing in response to an autofocus signal generated via phase contrast at the detector, the autofocus signal being generated using data from each pixel individually in each pair of detector pixels.