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Markus Geisen, Chris Jones, Melissa Shaw, Jeremy R. Young:
Three dimensional imaging of coccoliths and coccospheres
(Poster)

Coccoliths and coccospheres are strongly three-dimensional (3-D) objects but are, of course, too small to handle. Consequently, significant information is often lost or is difficult to understand in normal two-dimensional images. We have been exploring various methods of producing 3-D images for both research and exhibition purposes. These include: 3-D wireframe computer graphics JRY has been experimenting with these for some time, examples are available on the INA website (www.nhm.ac.uk/hosted_sites/ina/rhomboaster/intro.html or www.nhm.ac.uk/hosted_sites/ina/rotatingnannos). These have been used for research work and provide knowledge of coccolith morphology used in other techniques; red-green stereo-pair images MG and CJ have been producing stereo SEM images viewable with red-green glasses, using very high quality SEM images from a recently-acquired field emission Phillips SEM. This produces spectacular images for exhibition and scientific use; VRML 3-D computer models MS has been using high-end computer graphics techniques to produce 3-D virtual models of coccospheres. Models of individual liths are produced as wireframe models, SEM images are mapped onto them to provide a photo-realistic effect and the models are then assembled into coccospheres. These are primarily intended for exhibition purposes and internet use; and laser-etched images in glass A recently-developed technology allows 3-D computer objects to be realised by using a focused laser beam to etch a fracture pattern within the body of a glass block. MS has been investigating the potential of this technique for exhibition work, using coccolith models.

Figure 1: Webpage showing frame of VRML model - the image is freely rotatable via the WWW

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