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TUNABLE ACOUSTIC GRADIENT LENS SYSTEM UTILIZING AMPLITUDE ADJUSTMENTS FOR ACQUIRING IMAGES FOCUSED AT DIFFERENT Z-HEIGHTS
TUNABLE ACOUSTIC GRADIENT LENS SYSTEM UTILIZING AMPLITUDE ADJUSTMENTS FOR ACQUIRING IMAGES FOCUSED AT DIFFERENT Z-HEIGHTS
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机译:可调谐声学梯度镜头系统利用用于获取图像的幅度调整,其聚焦在不同的Z高度
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摘要
A variable focal length lens system includes a tunable acoustic gradient (TAG) lens; a TAG lens controller; and processor(s) configured to: (a) operate the TAG lens controller to drive a periodic modulation of the TAG lens optical power at a TAG lens resonant frequency, using a first amplitude driving signal that provides a first focal Z range extending between peak focus distances Z1max+ and Z1max−; and expose a first image using a first exposure increment approximately at the timing of Z1max+ or Z1max−; (b) adjust the TAG lens controller to drive the periodic modulation using a second amplitude driving signal that provides a second focal Z range extending between peak focus distances Z2max+ and Z2max−; and expose a second image using a second exposure increment approximately at the timing of Z2max+ or Z2max−; and (c) perform processing that includes determining focus metric values for the first and second images.
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