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US08908087B2 Multiband camera, and multiband image capturing method 有权
多频带摄像头,多频带摄像方式

Multiband camera, and multiband image capturing method
Abstract:
A multiband camera comprises: a band-pass filter having four or more optical filters; a microlens array having arrayed microlenses; a photoelectric conversion element including a plurality of pixels; and a measurement unit for measuring spectral intensity. The multiband camera satisfies the expression below, where Pl is a pitch between the microlenses, Ps is a pitch between the pixels, n is a number of pixels corresponding to one microlens, u is an effective dimension in a prescribed direction of the pixels, t is a dimension in the prescribed direction of a real image that the band-pass filter forms on a plurality of two-dimensionally arrayed pixels, Na is a number of microlenses arrayed in the prescribed direction, L is a distance from an exit pupil to the microlens, and f is a focal length of the microlens. ( 1 - f L ) ⁢ n ⁢ ⁢ Ps - 3 ⁢ Ps - u - t Na ≤ Pl ≤ ( 1 - f L ) ⁢ nPs + 3 ⁢ Ps - u - t Na [ Expression ⁢ ⁢ 14 ]
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