Another autofocus related patent has appeared from Canon. This time in the form of a foveon style multilayer AF sensor.
Patent Publication No. 2015-37217
- Published 2015.2.23
- Filing date 2013.8.12
- AF sensor
- In the depth direction, I comprises a first layer, the second layer, the photoelectric conversion portion of the third layer
- The second layer is for monitoring, detecting the amount of light that is received in real-time, to control the accumulation time
- The third layer in a bright environment, the dark environment so that the use of the first layer, sensitivity can be switched
- Furthermore, in a dark environment is used by adding the first and third layers
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