This is most likely the case... You would need to adjust somewhat for the knife edge effect. (Extremely thin edges defract lasers quite effectively) Taking a look at my neighbors set I can look through the shape adapter and seem to somewhat see the shape that it produces. Tiny little hole though... :) > > > > Just wondering how the different lenses for laser pens work, the ones > > that change the point to different shapes (a spaceship, arrow, etc.) > > Diffraction gratings? > TWO-dimensional holograms? > > The great thing about LASER light is that all it's beams are meant to be > parallel. > > Thus all you should need is a paper cutout and look! fancy shadow! :) > (lousy attempt at ASCII diargams follow :) > > Laser light: Mask: Fancy shape: > --------------------| > --------------------| > -------------------------------------- > --------------------| > -------------------------------------- > --------------------| > The mask just needs to be printed on a piece of plastic, or photo film. > > Ok... laser diodes need a colimating lens to make the beam parallel, > but I believe most have the lens in the housing these days. > > or: > maybe it's filtered through a specially cultured Perpyl Vilate crystal? > > -Josh Mayo [sig-less and LOVING it. ] > ( Everything with a grin. :) > > PS: Erm... I'm lousy at writing Flames, aren't I? > > -- > Subcription/unsubscription/info requests: send e-mail with subject of > "subscribe", "unsubscribe", or "info" to> Wear-Hard Mailing List Archive (searchable): http://wearables.blu.org > -- Todd Freeman CS Unix Support CAST Online Editor Web site: http://www.andrews.edu/~freeman/ -- Subcription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" to
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