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[OM] [OT] Lenses for wavefront coding & "lenslets"

Subject: [OM] [OT] Lenses for wavefront coding & "lenslets"
From: Chuck Norcutt <chucknorcutt@xxxxxxxxx>
Date: Thu, 03 Apr 2003 12:10:07 -0500
Someone mentioned a few days back that there is a new type of lens available that, in conjuction with computer processing, can produce significantly extended depth of field.

These lenses are known as "wavefront coding" and, amazingly, can be much simpler optically than normal, high quality lenses. Science News Magazine has a good overview article which can be found here:

<http://www.sciencenews.org/20030329/bob9.asp>

By the way, there is some familiar Olympus (and list) content here. Science News reports in this article that: "Olympus Optical of Tokyo, also is licensing the Boulder company's technology for use in extended depth-of-field endoscopes..."

The article also covers another type of lens called a "lenslet". These are tiny lenses of less than 1 mm focal length that are placed in arrays and then computer combined to produce an image of double the resolution of conventional lenses (presumbly, but not stated, covering the same area as the lens array).

It would appear that digital and digital optics is already taking on different forms.

Chuck Norcutt
Woburn, Massachusetts, USA


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