arXiv:1211.0336physics.optics
Handheld and low-cost digital holographic microscopy
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Abstract
This study developed handheld and low-cost digital holographic microscopy (DHM) by adopting an in-line type hologram, a webcam, a high power RGB light emitting diode (LED), and a pinhole. It cost less than 20,000 yen (approximately 250 US dollars at 80 yen/dollar), and was approximately 120 mm x 80 mm x 55 mm in size. In addition, by adjusting the recording-distance of a hologram, the lateral resolution power at the most suitable distance was 17.5 um. Furthermore, this DHM was developed for use in open source libraries, and is therefore low-cost and can be easily developed by anyone. In this research, it is the feature to cut down cost and size and to improve the lateral resolution power further rather than existing reports. This DHM will be a useful application in fieldwork, education, and so forth.
The paper on arxiv: http://arxiv.org/abs/1211.0336 The reduction in size is possible because they found a way to not use a beam splitter and lenses. Comparing the diagram on Wikipedia makes it easy to see how that could save a lot of space…
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