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(a) Normalized intensity profile of a single DMD pixel and projected on to a CMOS camera mounted in the image plane. This signal is a convolution of a one-pixel DMD line, and the translated step response of the camera pixel. (b) Intensity profile of a single line on-off-on pattern projected on to a camera in the image plane.
Confocal focus principle.
Pancharatnam phase device. (a) Required director configuration for a single tunable Pancharatnam liquid crystal lens. (b) A nematic liquid crystal micrograph of a six lens array, fabricated using the maskless exposure system. (c) A photograph demonstrating the focusing performance of the Pancharatnam lens device.
(a-f) Normalized confocal reflection intensity is plotted against objective position for different aperture sizes, (2, 4, 8, 16, 32, and 64 pixel checkers, respectively). (g) A plot of focus peak width versus aperture width shows the peak narrowing for smaller checkers, indicating that our measured signal can be interpreted as the confocal reflection.
Focus intensity is plotted against applied cell voltage for one Pancharatnam lens focus point.
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