Custom optics

goal: collimate light from an IR bulb or other IR source. 

one possibility: imagine a bunch of narrow tubes in front of an IR bulb (FIG 1). the insides of the tubes are mirrored and have a fresnel lens-like profile (FIG 2). call it the 
sort of an "inverse" fresnel mirror, call it a "funhouse". narrow tubes toothed items, the insides of which are mirrored. air in the centre. "vertical" parts of the teeth are not mirrored and will let light pass thru.
  Inline image 1
FIG 1. bunch of tubes

idea is to have a parabolic or ellipsoidal reflector behind the IR element and a whole

Mahesh Viswanathan,
Jun 4, 2012, 2:30 PM