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In this paper, a depth-of-field extension method is introduced. The extension is realized by the variable annular aperture method previously proposed by the authors and focal plane oscillation method. By combining those methods, we see a synergetic effect that the depth-of-field is more extended than when each method is applied independently. The variable aperture and the focal plane oscillation are...
The DOF (depth of field) of an imaging system is closely related to the pupil function that describes the characteristics of the pupil such as size and shape. Shallow DOF is especially problematic in microscopic optical imaging systems because they have relatively large aperture size for high optical resolution. In this paper, a new DOF extension method is proposed. This is to acquire an image by...
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