Focus detecting apparatus
AssigneeNikon Corporation
InventorToru Iwane
Life of this patent
Estimating the term…
Abstract
Disclosed in a focus detecting apparatus comprising: a micro lens array arranged with a plurality of micro lenses, a photo detector that has a plurality of detecting elements provided in correspondence with the micro lenses and receives light flux from an optical system via the micro lenses; and a focus detector that selects a pair of groups of detecting elements from the plurality of detecting elements based on an F-value of the optical system and a brightness of the light flux from the optical system and detects a focus adjustment status of the optical system based on a pair of light receiving signals obtained in the groups of detecting elements.
Claims7
A focus detecting apparatus comprising:
- a micro lens array arranged with a plurality of micro lenses;
- a photo detector that has a plurality of detecting elements provided in correspondence with the micro lenses and receives light flux from an optical system via the micro lenses;
- and
- a focus detector that selects a pair of groups of detecting elements from the plurality of detecting elements based on an F-value of the optical system and a brightness of the light flux from the optical system, and detects a focus adjustment status of the optical system based on a pair of light receiving signals obtained in the groups of detecting elements, wherein
- at a time of selecting the pair of groups of detecting elements from the plurality of detecting elements, the focus detector selects the pair of groups of detecting elements based on a table having a relationship between an F-value of the optical system and a brightness of the light flux from the optical system and arrangement patterns of the detecting elements, constituting the pair of group of detecting elements.
Dependencies are inferred from the claim text.