Yea, i noticed that lens+nixie tubes could work (never really understood why i hasnt been used though. maybe the lenc were too expensive to make?) when i messed up with large fresnel lens from old ovehread projecotr :)
On Thursday, 11 December 2014 20:47:21 UTC+1, gregebert wrote: > > Awhile back I mentioned I would experiment with a smaller nixie tube and a > plano-convex lens to see if it's feasible to 'synthesize' a larger nixie > display. > I obtained two 50mm (about 2") glass lenses from Ebay for a few dollars, > and tested them with 5092 nixie tubes (15mm, or 0.6") > > Observations > 1. Looking straight into the lens, digits were clearly readable, much > larger and good brightness. *It actually worked*. In fact, it worked so > well that I got digits almost 2" tall from a 5092 nixie. > > Drawbacks: > 1. The viewing angle is significantly reduced. Basically, you have to > observe the tube directly thru the axis of the lens > 2. Only a few digits will be in-focus. This is because the various > digit-cathodes in the nixe-tube are stacked, and therefore only a few will > be close to the focal point of the lens > 3. You have to create some sort of mounting for the lens. Unless the tubes > are already sufficiently spaced apart, you wont have room for multiple > lenses. > > Unfortunately, you cant get something for nothing: A $3 lens + $6 nixie > tube is not the same as a $400 nixie tube (That's the most recent > selling-price I saw for a single 7094 on Ebay) > > Sorry I dont have time to make a lens-holder and take pictures; too busy > with my wristwatch. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/88c3058a-b1ab-4ea9-b966-02e35990a382%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
