Patent ID: 7577349
Filing Date: 2009-08-18
Classification: G02B,G03B

Abstract:
1. A phase difference detection type focus detecting device comprising: a first sensor group having a plurality of photoelectric conversion elements, the first sensor group functioning as a standard portion for phase difference detection; a second sensor group having a plurality of photoelectric conversion elements, the second sensor group being paired with the first sensor group and functioning as a reference portion for phase difference detection; a third sensor group having a plurality of photoelectric conversion elements, the third sensor group functioning as a standard portion for phase difference detection; and a fourth sensor group having a plurality of photoelectric conversion elements, the fourth sensor group being paired with the third sensor group and functioning as a reference portion for phase difference detection, wherein each photoreceiving area of the third and fourth sensor groups is larger than each photoreceiving area of the first and second sensor groups.