Follow
Friday, 20 June 2014 13:44

M4-12: DICHROIC FILTERS

m4-12am4-12bm4-12cm4-12d

 

Additional Info

  • ID Code: M4-12
  • Purpose: Show how dichroic filters work.
  • Description:

    These filters are glass plates that contain a series of equally spaced high refractive index dielectric layers. The layers reflect light of a particular wavelength, leading to destructive interference, so the reflected and transmitted light are complementary colors. The filter is labeled by the transmitted color, so a red filter transmits red and reflects cyan, a yellow filter reflects blue, a green filter reflects magenta, and a blue filter reflects yellow. To facilitate re-mixing and display, the spacing of the reflective layers in these filters are designed for light incident at 45 degrees.

    In the photographs above the direct beam is at the left and the reflected beam is at the right. The reflected beam from the red filter (left) is a bit saturated, so the cyan coloring is not readily visible.

  • Availability: Available
Read 616 times Last modified on Wednesday, 03 September 2014 17:02
  • 1