| 摘要 |
A focus detection apparatus has at the rear side of an objective lens an imaging means which re-projects a first image of an object formed on the imaging plane as a plurality of second images of the object. The apparatus also has a light-receiving means which detects the relative positional relationship between the second images of the object so as to discriminate the focusing state of the objective lens. The light-receiving planes of the light-receiving means are shaped in the form of sine waves such that the outputs from the light-receiving means corresponding to the respective second object images become Fourier transforms.
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