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| | | #REDIRECT [[Optical imaging probe]] |
| #REDIRECT [[optical imaging probe]] | |
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| == optical imaging probe ==
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| <div class="definition"><div class="short_definition">(''Also called'' optical array probe.) An [[optical particle probe]] that records the size and shape of the [[shadow]] of each [[particle]] that intercepts and attenuates the [[illumination]] by a [[laser]] beam.</div><br/> <div class="paragraph">Of these, shadowing probes differentiate particle shadows from the [[light]] of the unobstructed [[beam]] with [[linear]] arrays of optically activated diodes; for example, the [[one-dimensional cloud probe]] normally for sizing 10-μm to either 300- or 600-μm cloud hydrometeors, the [[two-dimensional cloud probe]] normally for sizing and imaging 25–800-μm [[cloud]] hydrometeors, and the [[two-dimensional precipitation probe]] normally for sizing and imaging 200-μm to 6.4-mm [[precipitation]] hydrometeors. The electronics record either the maximum one-dimensional width of the shadow or two dimensions and shape of the shadow, to estimate particle size and type ([[raindrop]], [[crystal]] growth habit, etc.). Another type, the [[cloud particle imager]], illuminates each particle with a pulsed laser and records size, shape, and detailed structure of each [[hydrometeor]] with a high-resolution solid-state digital imaging camera, normally to size 5-μm–2.3-mm hydrometeors.</div><br/> </div>
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