Interference filters are listed by wavelength in Ångstroms at center, peak, FWHM and old label followed by % transmission, size (in inches), and date last tested. Column 8 is filter location, Column 9 comments. Storage locations are; 1. Optics lab 2. Rm 103, 107" 3. 107" cass control rm. 4. 107" coude slit rm. 5. 82" cass control rm. 6. 82" coude
Clicking on centeral wavelength will bring you to a page which includes a high resolution (a point every Ångstrom) scan of wavelengths around the central wavelength, as well as a lower resolution (a point every 10 Ångstroms) scan from 3000-9000 Ångstroms to show any leaks. Also included in the page will be past values and a listing of the FWHM, peak wavelength, maximum transmission, and central wavelength
All values are in Ångstroms. Cent W/L means Central Wavelength, Peak W/L means Peak wavelength, FWHM means the full width at half maximum, details about the history of the filters can be viewed in their individual pages. The size means the size of the filter, and "inv #" means the McDonald inventory number of the filter. Comments are comments.
~3100Å ~5000Å ~6700Å ~10300ÅCentPeak FWHM % tr size inv # comments W/L W/L 3092 3092 35 1.761 1d 002 Leak near 4500Å, look at graph or list for max transmission 3159 3164 144 15.789 1d 001 3618 3618 36 20.045 1d 003 Leak near 7500Å, look at list for max transmission 3651 3634 142 24.385 2d 097 MINOR leak starting around 6500Å, irregular transmission shape 3879 3879 58 24.420 1d 005 A few minor leaks, may want to look at graph 3925 3944 83 22.336 2d 004 Leak near 4700Å, strange transmitting shape, look at graph for max on leak 3944 3990 243 33.105 1d 006 3969 3970 52 42.389 2d 008 Leak near 5000Å, look at graph for location and list for max transmission 3980 3982 112 26.527 1d 007 4016 4016 27 14.231 2.1d 009 4066 4066 35 42.052 2sq 010 A few VERY minor leaks (below .025%) at higher wavelengths, look at the graph 4077 4077 32 39.390 1.5d 011 HUGE leak from 7200Å up to at least 9000Å, as well as a few smaller leaks 4103 4101 99 32.214 2sq 098 4142 4145 75 31.424 1sq 012 4234 4235 58 54.380 2d 013 4282 4282 27 1.588 1.5d 100 HUGE leak near the red end 4305 4297 53 35.261 2d 015 Slight leak near 5200Å, look at graph for location and list for max transmission 4311 4309 280 53.700 2sq 101 4323 4322 45 52.560 2sq 016 A few leaks, see graph for locations and list for max transmissions 4358 4340 101 0.549 1.5d 014 4403 4403 48 68.082 2d 018 4644 4644 34 40.811 1d 021 4644 4644 35 39.937 1d 102 4687 4685 39 21.931 1d 020 Strange shape or strong leak overlapping with peak. SEE GRAPH AND TABLE, AS WELL AS NOTE 4699 4726 104 44.822 1d 019 4701 4700 35 35.658 1d 104 4706 4729 106 45.928 1d 105 4724 4724 28 7.543 1d 103 Leak on the blue side of the peak goes to around 0.05%, leak on the red side goes to around 0.1% transmission 4734 4723 65 70.713 2d 022 Slight leak around 3750Å, see graph and list (around 0.1% max transmission) 4847 4837 59 62.918 2d 024 Cent Peak FWHM % tr size inv # comments W/L W/L 4867 4867 54 35.198 1d 023 SLIGHT leak around 7500Å, see graph 4890 4888 33 9.618 1sq 025 4937 4937 22 14.675 2d 099 Minor leak near 7200Å 4948 4947 72 32.020 1sq 026 A few leaks, see graph and list for locations and max transmissions 5035 5033 57 59.815 1d 028 5092 5089 58 70.363 2d 029 5129 5129 79 75.838 2d 030 Slight leak near 6500Å, see graph and list for location and max transmission 5300 5300 22 3.361 2d 031 5426 5426 60 61.841 2d 032 Leak between 4400 and 4700Å. Two peaks approach 12% 5793 5808 80 39.893 1d 035 what appears to be a leak of about .01% may be a flaw from the scanning method 5871 5870 23 16.791 1d 036 5872 5873 85 52.727 2sq 037 5899 5893 68 59.600 2d 038 5910 5898 100 55.858 1d 039 6002 6000 100 58.634 1d 040 6010 5997 77 59.633 2d 041 Leaks toward higher end, non-normal shape 6063 6054 87 62.452 2d 042 6183 6206 86 49.857 2sq 043 6191 6186 113 64.685 1d 044 6198 6194 113 63.158 1d 045 6279 6301 89 63.795 2d 053 Leak near 7300Å transmits slightly more than 0.1% 6281 6282 58 67.461 2sq 047 6301 6314 82 61.947 2sq 048 6346 6354 69 69.473 2d 049 Highest leak almost reaches 0.5% 6355 6357 92 52.429 1d 050 6372 6368 117 35.317 1d 051 6389 6382 96 71.827 2d 046 Leak towards the higher end goes up to around 0.1% 6558 6558 23 33.798 1d 054 6571 6538 124 63.138 1sq 056 6574 6550 122 63.985 1sq 055 Cent Peak FWHM % tr size inv # comments W/L W/L 6597 6597 68 51.327 1sq 057 6603 6603 65 55.343 1sq 052 6676 6679 82 15.656 2sq 058 6714 6706 122 77.148 2d 106 6697 6768 838 50.626 2sq 059 Leak near 9000Å climbs to 1% at 9000Å 6699 6687 92 80.507 2d 060 6736 6733 94 47.781 2sq 062 You probably do not want to use this filter. See page. 6811 6818 87 74.963 2d 063 6931 6935 100 68.139 2d 064 6958 6973 150 88.847 2sq 065 Large leak near 9000Å, with peak at around 8940Å near 60% 7067 7083 89 50.171 1d 066 7082 7058 128 62.732 1sq 067 7399 7400 113 64.163 2sq 068 All leaks shown transmit at less than 1% 7563 7560 88 61.407 2sq 069 The leak only has a transmittance of less than 1% 7633 7618 117 47.489 1d 070 7652 7647 108 56.764 2sq 071 7652 7650 41 22.338 1d 072 7713 7700 110 48.564 1d 074 7793 7797 113 55.270 1sq 075 7804 7791 118 34.376 1d 076 7815 7770 153 54.232 1sq 077 7900 7898 93 58.928 2sq 078 7908 7920 275 53.844 2sq 079 8019 8017 143 85.157 2d 081 8136 8120 112 44.657 1sq 082 8200 8206 107 55.548 2sq 084 8240 8212 614 55.654 2sq 083 No previous information, but weird shape. Leak at higher value goes up to almost 2% 8423 8424 165 73.764 2d 085 Leak near 9000Å has a maximum value (less than 9000Å) near 0.3% 8701 8695 106 66.773 2sq 086 8788 8799 124 80.770 2d 087 Cent Peak FWHM % tr size inv # comments W/L W/L 8930 8930 152 60.079 2sq 088 The FWHM and Central Wavelength are estimates because the machine will not scan past 9000Å. See page for details ~9900 61 2sq 080 The data to the left (of this comment) is from a past scan, because the Cary 100 has a range which falls short of where the peak is thought to be for this filter. 10247 10247 108 41 2sq 089 The data to the left (of this comment) is from a past scan, because the Cary 100 has a range which falls short of where the peak is thought to be for this filter. 10310 10310 18 74 2d 090 ditto on the data being old (from the last two), but there is also a large leak near 7500Å 10402 10402 21 71 2d 091 The data to the left (of this comment) is from a past scan, and there is a large leak near 7500Å 10527 10527 21 73 2d 092 Data from past scan (in table), Non uniform appearance, slight leask from 6500-9000Å, at least 10663 10663 20 71 2d 093 Data from past scan (in table), slight leak 10739 10734 21 69 2d 094 Data from past scan (in table), note about tilting filter in filter box but no noticable difference in transmission profile when filter having opposite face front, slight leaking 10843 10869 162 71 2d 095 Data from past scan (in table), slight leak between 8000 and 9000Å 10982 10982 101 58 2sq 096 Data from past scan (in table) n/a This is a bad filter. BAD!!! 027 You can still look at the graph, but it's a terrible filter. 4374 4379 47 68 2d 017 Filter Missing, Not Scanned 5552 421 65 53 2d 033 Filter Missing, Not Scanned 5727 5639 100 66. 2d 034 Filter Missing, Not Scanned 6721 6697 91 85.8 2d 061 Filter Missing, Not Scanned 7715 7710 72 88 2d 073 Filter Missing, Not Scanned
EOF Interference Filters Last inventory no. 106