Patent ID: 8724982
Filing Date: 2014-05-13
Classification: G02B,G03B,H04N

Abstract:
1. A focus control device comprising: in-detection-range focal depth number calculation circuitry that calculates a number of in-detection-range focal depths as a number of focal depths, which are divided as division units and each of which is based on a corresponding position of a focus lens, in accordance with a detection range in which the focus lens is shifted to detect a contrast of a captured image signal; detection interval determination circuitry that determines a number of in-detection-interval focal depths, which represents the number of focal depths as the division units, as a detection interval in the detection range, based on the calculated number of in-detection-range focal depths as compared to a plurality of predetermined ranges of in-detection-range focal depths of a detection interval table stored in memory; and focus lens shift instruction circuitry that instructs lens circuitry to perform a focus search which shifts the focus lens by specifying the detection range and the number of in-detection-interval focal depths determined as the detection interval.