Multifunction lens
View Patent ↗An image capture apparatus and a method of image processing. The apparatus includes an image sensor array which receives light that has been reflected by a scene, a luminance photodetector which receives light from a luminance channel, a multifunction lens, and a processor. The multifunction lens includes an imaging lens portion and the luminance channel. The imaging lens portion directs the light that has been reflected in a first direction onto the image sensor array. The luminance channel includes an optical element which directs the light from the luminance channel in a second direction different from the first direction onto the luminance photodetector. The image sensor array and the luminance photodetector each convert the light they receive to image data electrical signals and luminance data electrical signals, respectively. The processor processes the image data electrical signals to form an image of the scene using the luminance data electrical signals.
1. An image capture apparatus comprising:
an image sensor array configured to receive light from a light source that has been reflected by a scene and to convert the received light to image data electrical signals;
a luminance photodetector configured to receive light from a luminance source and to convert the received light to luminance data electrical signals;
a multifunction lens comprising an imaging lens portion and a luminance channel, the imaging lens portion configured to receive the light that has been reflected by the scene, the light traveling in a first direction, and to direct the light onto the image sensor array, the luminance channel including an optical element, the luminance channel configured to receive the light from the luminance source, the light traveling in a second direction different from the first direction, and to direct the light onto the luminance photodetector via the optical element; and
a processor configured to receive the image data electrical signals from the image sensor array and the luminance data electrical signals from the luminance photodetector and to process the image data electrical signals to form an image of the scene using the luminance data electrical signals.
2. The apparatus of claim 1 , wherein:
the image sensor array further comprises a plurality of photo detectors, and
the image sensor array and the luminance photo detector are fabricated over the same substrate, the plurality of photo detectors of the image sensor array occupy an area on the substrate and the luminance photo detector is in an area of the substrate that is distinct from and outside of the area on the substrate occupied by the image sensor array.
3. The apparatus of claim 2 , wherein the luminance channel portion including the optical element is configured to direct the light from the luminance channel onto the luminance photodetector in a separate path from the light directed by the imaging lens portion onto the image sensor array.
4. The apparatus of claim 2 , wherein a surface of the substrate onto which the light is directed faces the first direction.
5. The apparatus of claim 1 , wherein the luminance channel is further configured to direct light that has not been reflected by the scene onto the luminance photo detector.
6. The apparatus of claim 1 , wherein the first direction is normal to the second direction.
7. The apparatus of claim 1 , wherein the optical element is a mirror.