engleski

Biological samples used for imaging

For some time, there are efforts to apply the natural biological structures as imaging detectors by using thermally-induced effects[1-3]. The read- out of those possible devices is usually all optical i.e., instead of electronic signal read from CCDs, the image information would come from light beam interaction with the sensitive area - focal point array (FPA). The foreseen advantage is multispectral sensitivity of such devices. As a most precise method for detecting sub micron changes on FPA one could use holography, as in [1]. In a possible practical implementation of this approach, artificial nanostructures will be fabricated inspired by biological samples. In this work we present optical reading from butterfly wings by means of digital holographic microscopy in a compact Twyman - Green configuration where wings scales are used as pixels of the FPA. By shining the auxilliary laser on the wing, individual scales are excited. We show spatial and temporal sensitivity of the setup with wings. As a next step artificial nanostructures in a role of FPA will be investigated, and integrated in a compact imaging device.

Holography, biomimetics

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