From: jeroen@nospam.please   
      
   On 1/7/26 12:54, Martin Brown wrote:   
   > On 07/01/2026 11:45, albert@spenarnc.xs4all.nl wrote:   
   >> In article <10jaut7$16l4g$1@dont-email.me>,   
   >> Martin Brown  <'''newspam'''@nonad.co.uk> wrote:   
   >>   
   >>> Flat OHP condenser lenses are a good source of cheap big fast ones.   
   >   
   >> There is a guy publishing experiments with the optics of a flat tv   
   >> screen on youtube.   
   >   
   > Do you mean from the venerable Sinclair TV80 flat screen portable TV?   
   >   
   > One of my friends won one on the first ever edition of Krypton Factor.   
   >   
      
   There are pretty decent polarizer sheets in LCD screens. Using   
   these, I discovered that certain Chinese brands of polyester   
   rulers make fair quarter-wave plates. Build your own quantum   
   optics experiments for free!   
      
   Jeroen Belleman   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)