Tuesday, February 7, 2017

Images from Polanret!

As efforts continue to shift this Blog into more visual presentations, here two sets of images made from a single diatom at random setting for the instrument.

The in the first set, immediately below, colors from the camera images have been left largely intact. However, note that the colors are, to some extent, due to the interactions between the residual phase information from the instrument and the internals of the digital camera, and are not present to the same extent in the visual images.  (Such effects are common in phase contrast imaging and are not peculiar to the Polanret. They may. however, vary somewhat with the specific camera used, in this case a Canon 2400is.)


The next set contains exactly the same images as above, but with the extraneous color information suppressed. This provides a better representation of the actual visual appearance of the specimen.


This set more clearly demonstrates both the Polanret's ability to vary the image contrast level continuously and the ability to switch seamlessly between Bright and Dark contrast modes. (Click on an image set for larger versions, then use the Back button in your browser to return to this page.)

A more technical discussion of the Polanret system will follow in a day or two… 

Also, see the Blog Post of January 28, 2017 for an earlier discussion of this system. 

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