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KPNO Filter Information


Phoenix Filters


Phoenix Order Sorting Filters
Name Start* Stop* Transmission echelle
  cm-1 μm cm-1 μm percent order**
M1930 1890=5.291 1970=5.076 80 11
M2030 1980=5.050 2080=4.808 85 11
M2150 2105=4.751 2190=4.566 84 12
L2462 2410=4.149 2495=4.008 85 14
L2734 2680=3.731 2770=3.610 80 15
L2870 2820=3.545 2910=3.436 85 16
L3010 2950=3.390 3050=3.279 90 17
L3100 3030=3.300 3145=3.180 91 17
L3290 3240=3.085 3355=2.980 80 19
K4132 4077=2.452 4156=2.406 72 23
K4220 4188=2.392 4263=2.348 59 24
K4308 4258=2.349 4355=2.296 50 24
K4396 4355=2.296 4446=2.249 55 25
K4484 4429=2.250 4525=2.210 67 25
K4578 4525=2.210 4630=2.160 65 26
K4667 4617=2.166 4717=2.120 73 26
K4748 4704=2.126 4803=2.082 74 27
H6073 6017=1.662 6129=1.632 84 34
H6420 6377=1.568 6464=1.547 66 36
J7799 7750=1.290 7865=1.271 65 44
J8265 8243=1.213 8360=1.196 50 47
J9232 9183=1.089 9286=1.077 42 52
J9671 9652=1.036 9709=1.030 53 55

*At full transmission, wings extend further.
**At center of band pass.
Filters K4132 and J9671 are not currently installed in Phoenix.


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