Hawaii/HIFI filters

cw=central wavelength in A at T~=22 C (subtract ~4 A to get cw at 0 C)
bw=fwhm in A

   cw             bw           peak transmission

  5012            35                64%
  5038            36                65%
  5063            38                69%
  5083            35                68%
  5109            26                70%

  6559            54  (old)         85%
  6594            57  (old)         85%
  6618            55  (old)         87%
  6641            27                74%
  6660            27                72%
  6686            29                71%
  6706            28                72%
  6729            28                74%
 

In addition, all of the new filters have

1) .1bw = 67 +/- 18 A (green filters) or 60 +/- 15 A (red filters).
2) in-band ripples of less than 5% peak to peak.
3) Both surfaces are AR coated.
4) blocking = 1e-5 to 11000 A

We bought these new filters from Barr Associates for $1100 each.

From Brent: size : 25mm x 25mm x 6mm
                    dLam/dT = -0.18A/K