# Subaru Telescope Infrared Secondary Mirror Witness Sample Reflectivity # Coated with Silver on 2019-11-07 # Opened the vacuum chamber on 2019-11-11 # Measured with Subaru Portable Spectrophotometer (SPS) on 2019-11-12 # Measured three times # Data between 950 nm and 1650 nm are also available (SPS-XWW). # Contact: Hirofumi Okita (okita14@naoj.org) # # Wavelength (nm) #1 #2 #3 1000 99.42 99.33 100.14 998 98.75 98.97 99.20 996 98.95 98.87 98.15 994 100.61 99.37 99.24 992 98.74 98.16 99.88 990 99.06 98.96 98.82 988 99.33 99.80 99.58 986 99.05 98.85 99.52 984 99.08 98.96 100.44 982 98.85 98.71 99.50 980 99.37 99.06 99.68 978 99.14 99.42 99.81 976 99.63 99.09 99.37 974 98.21 99.18 99.41 972 98.26 98.70 99.91 970 99.46 99.59 99.77 968 98.93 98.72 98.71 966 98.71 98.69 99.04 964 99.40 99.67 98.44 962 98.94 99.11 98.99 960 98.97 99.58 98.77 958 99.02 98.83 99.03 956 99.09 99.73 99.52 954 99.45 99.83 99.62 952 99.82 100.08 99.14 950 98.50 98.80 99.83 948 98.82 99.60 99.13 946 99.24 99.35 99.21 944 99.42 98.87 99.59 942 99.57 98.74 99.33 940 99.40 98.87 99.28 938 99.14 99.21 99.12 936 98.72 99.29 99.01 934 98.76 99.07 99.47 932 98.67 98.92 98.91 930 99.46 99.37 98.89 928 98.61 98.86 99.73 926 99.46 99.36 99.60 924 99.02 98.67 99.29 922 99.36 98.80 99.47 920 99.20 98.85 99.23 918 99.19 99.07 98.96 916 99.24 99.20 99.43 914 99.34 99.28 99.38 912 99.41 98.85 99.26 910 99.23 99.46 99.80 908 99.15 98.76 99.16 906 99.24 99.42 99.09 904 99.14 99.07 99.34 902 99.24 98.92 98.97 900 99.23 99.39 99.58 898 99.42 98.82 99.28 896 99.16 99.19 99.28 894 99.34 99.25 99.53 892 99.25 98.81 99.07 890 99.18 99.24 99.12 888 99.27 98.99 99.03 886 99.14 99.19 99.34 884 99.17 98.97 99.18 882 99.49 99.70 99.50 880 99.21 99.24 99.09 878 99.31 99.45 99.01 876 99.38 99.06 99.32 874 99.11 99.10 99.15 872 98.71 99.05 99.75 870 99.09 99.05 99.11 868 99.09 99.29 99.29 866 99.21 99.08 99.31 864 99.26 99.08 99.33 862 99.38 99.12 99.28 860 99.13 99.08 98.99 858 98.97 99.13 99.13 856 99.32 99.16 99.28 854 98.95 99.11 99.45 852 98.99 99.05 99.25 850 99.19 99.35 99.09 848 98.93 99.41 99.15 846 99.15 98.81 99.30 844 98.89 99.24 99.19 842 99.33 98.83 98.92 840 99.04 98.90 99.11 838 99.18 99.15 99.46 836 99.28 99.50 99.04 834 99.03 98.77 99.47 832 99.25 98.69 99.14 830 98.98 98.87 99.48 828 99.37 98.88 98.97 826 98.84 98.48 99.03 824 99.44 99.45 98.67 822 99.28 99.07 99.18 820 99.32 99.56 99.33 818 99.25 99.06 99.14 816 99.32 99.37 98.77 814 98.96 99.59 99.35 812 99.19 99.05 99.10 810 99.53 99.04 99.06 808 99.03 99.30 99.55 806 99.19 99.08 99.06 804 99.14 99.00 99.45 802 99.15 99.18 99.27 800 99.13 98.98 99.00 798 99.00 99.12 98.79 796 99.04 98.98 98.88 794 98.85 98.78 98.99 792 99.45 99.23 98.80 790 99.19 99.37 99.05 788 98.97 98.73 99.11 786 99.21 98.84 98.97 784 99.14 98.85 99.22 782 99.09 98.87 98.98 780 98.99 99.24 99.04 778 98.97 98.92 99.25 776 98.91 98.90 98.97 774 99.29 98.87 99.21 772 99.13 99.05 99.31 770 99.20 98.88 99.09 768 99.20 98.99 99.26 766 99.16 99.16 99.25 764 99.36 98.91 99.15 762 99.08 99.01 99.06 760 98.88 98.95 99.26 758 99.01 98.95 98.99 756 98.83 98.87 99.00 754 99.13 98.61 98.80 752 99.00 98.82 99.10 750 98.91 98.79 98.96 748 99.18 98.94 98.81 746 99.03 99.10 99.37 744 99.33 98.87 99.30 742 99.07 98.84 99.03 740 98.62 99.08 98.92 738 99.10 99.01 98.95 736 99.21 98.98 99.07 734 98.82 98.73 98.81 732 98.87 98.75 98.93 730 98.99 98.89 98.77 728 99.30 98.85 99.13 726 99.13 98.88 99.10 724 99.02 98.75 98.90 722 98.97 99.05 98.98 720 99.05 98.98 98.73 718 98.92 99.03 98.74 716 98.93 99.03 98.75 714 98.95 98.81 99.02 712 98.78 98.83 98.99 710 98.96 98.94 98.72 708 99.03 98.81 98.97 706 98.91 98.85 99.00 704 98.71 98.90 98.97 702 99.24 98.90 98.77 700 98.96 98.87 98.84 698 98.89 98.74 98.68 696 98.91 98.83 98.74 694 99.04 98.91 98.90 692 98.92 98.98 99.17 690 99.03 98.72 98.82 688 99.08 98.87 98.85 686 98.99 98.67 98.87 684 98.82 98.74 98.90 682 99.07 99.08 98.71 680 99.07 98.96 98.89 678 98.89 98.83 98.80 676 98.92 98.83 98.89 674 98.69 98.73 98.90 672 98.81 98.84 98.81 670 99.00 98.68 98.90 668 98.83 98.84 98.94 666 98.96 98.85 98.75 664 98.88 99.05 98.90 662 99.06 98.74 98.90 660 98.73 98.82 98.98 658 98.98 98.65 98.72 656 98.62 98.73 98.90 654 98.86 98.66 98.72 652 99.04 98.80 98.57 650 98.71 98.56 98.66 648 98.59 98.74 98.61 646 98.90 98.73 98.69 644 98.97 98.81 98.90 642 98.72 98.52 98.72 640 98.95 98.59 98.97 638 98.66 98.63 98.74 636 98.71 98.72 98.47 634 98.65 98.71 98.70 632 98.70 98.61 98.89 630 98.51 98.67 98.73 628 98.77 98.56 98.62 626 98.74 98.70 98.57 624 98.82 98.79 98.61 622 98.72 98.62 98.46 620 98.67 98.57 98.71 618 98.56 98.60 99.01 616 98.63 98.57 98.81 614 98.74 98.52 98.47 612 98.62 98.51 98.71 610 98.85 98.54 98.61 608 98.75 98.51 98.79 606 98.84 98.56 98.51 604 98.70 98.69 98.50 602 98.70 98.68 98.73 600 98.76 98.55 98.56 598 98.70 98.52 98.50 596 98.80 98.51 98.65 594 98.57 98.70 98.54 592 98.85 98.66 98.52 590 98.94 98.57 98.58 588 98.67 98.25 98.60 586 98.57 98.58 98.39 584 98.63 98.46 98.51 582 98.52 98.63 98.43 580 98.35 98.51 98.65 578 98.67 98.58 98.41 576 98.65 98.61 98.67 574 98.77 98.43 98.53 572 98.66 98.57 98.31 570 98.39 98.55 98.68 568 98.53 98.52 98.54 566 98.57 98.58 98.39 564 98.39 98.64 98.64 562 98.51 98.50 98.61 560 98.53 98.35 98.53 558 98.33 98.50 98.29 556 98.56 98.62 98.37 554 98.37 98.32 98.42 552 98.37 98.48 98.47 550 98.64 98.70 98.46 548 98.52 98.36 98.32 546 98.44 98.49 98.33 544 98.48 98.26 98.35 542 98.19 98.31 98.52 540 98.25 98.28 98.41 538 98.46 98.23 98.53 536 98.25 98.11 98.47 534 98.37 98.19 98.27 532 98.49 98.45 98.23 530 98.47 98.32 98.32 528 98.57 98.47 98.18 526 98.32 98.41 98.25 524 98.35 98.39 98.15 522 98.20 98.36 98.40 520 98.17 97.98 98.29 518 98.06 98.22 98.20 516 98.43 97.98 98.19 514 98.03 98.14 98.40 512 98.08 98.23 98.17 510 97.97 98.32 98.10 508 98.53 98.07 97.99 506 98.14 98.12 98.09 504 98.29 98.15 98.18 502 98.39 98.05 97.98 500 98.12 98.15 97.99 498 98.01 97.93 97.88 496 98.15 97.94 98.20 494 98.08 97.88 98.17 492 98.18 98.15 97.91 490 98.06 98.25 97.91 488 97.85 97.95 97.92 486 98.01 97.60 97.67 484 98.07 98.07 97.96 482 98.11 97.88 98.02 480 97.90 97.63 97.87 478 98.12 97.71 97.69 476 97.90 97.46 97.78 474 97.71 97.54 97.86 472 97.44 97.71 98.23 470 97.77 97.62 97.86 468 97.85 97.70 97.71 466 97.74 97.64 97.61 464 97.51 97.58 97.86 462 97.50 97.38 97.50 460 97.94 97.26 97.82 458 97.62 97.26 97.55 456 97.32 97.23 97.67 454 97.68 97.36 97.61 452 97.26 97.73 97.35 450 97.51 97.57 97.35 448 97.01 97.21 97.59 446 97.39 96.68 97.16 444 97.67 96.85 97.24 442 97.41 97.18 97.54 440 97.31 96.86 97.14 438 97.03 97.09 97.28 436 96.75 96.89 97.28 434 96.98 96.86 97.25 432 96.78 96.59 97.10 430 97.02 97.01 96.73 428 97.05 96.76 96.82 426 96.77 96.92 97.20 424 96.87 96.94 96.89 422 96.14 96.06 96.43 420 96.95 96.09 96.91 418 96.38 96.32 96.88 416 96.95 96.41 96.15 414 96.58 96.52 96.26 412 96.52 96.32 96.24 410 96.33 95.91 95.76 408 96.03 95.51 95.91 406 95.25 95.55 95.79 404 96.04 96.03 95.86 402 95.06 95.13 95.94 400 95.28 95.68 95.17 398 95.63 96.03 95.18 396 95.80 95.45 95.70 394 95.96 94.90 94.77 392 95.66 95.26 95.42 390 95.33 94.56 94.85 388 95.17 93.80 94.84 386 94.59 95.23 94.85 384 94.69 93.95 94.17 382 95.20 93.50 94.03 380 94.25 93.53 93.75 1650 99.38 99.23 99.28 1640 99.36 99.21 99.27 1630 99.35 99.22 99.27 1620 99.34 99.22 99.28 1610 99.35 99.21 99.28 1600 99.34 99.22 99.29 1590 99.35 99.22 99.27 1580 99.33 99.22 99.28 1570 99.34 99.22 99.28 1560 99.34 99.22 99.27 1550 99.34 99.22 99.27 1540 99.34 99.22 99.27 1530 99.33 99.22 99.27 1520 99.32 99.23 99.27 1510 99.33 99.21 99.27 1500 99.33 99.21 99.26 1490 99.33 99.21 99.25 1480 99.31 99.21 99.26 1470 99.33 99.21 99.26 1460 99.32 99.22 99.26 1450 99.32 99.21 99.25 1440 99.31 99.21 99.24 1430 99.31 99.20 99.24 1420 99.31 99.20 99.24 1410 99.31 99.20 99.24 1400 99.31 99.20 99.23 1390 99.31 99.20 99.24 1380 99.31 99.19 99.24 1370 99.31 99.19 99.23 1360 99.30 99.19 99.23 1350 99.30 99.19 99.24 1340 99.30 99.19 99.23 1330 99.30 99.20 99.23 1320 99.30 99.19 99.23 1310 99.30 99.19 99.23 1300 99.30 99.20 99.22 1290 99.30 99.18 99.23 1280 99.30 99.19 99.24 1270 99.29 99.19 99.24 1260 99.30 99.19 99.23 1250 99.29 99.19 99.23 1240 99.29 99.18 99.23 1230 99.30 99.18 99.24 1220 99.30 99.18 99.23 1210 99.30 99.19 99.23 1200 99.28 99.18 99.23 1190 99.29 99.18 99.22 1180 99.29 99.18 99.22 1170 99.28 99.17 99.22 1160 99.29 99.18 99.22 1150 99.30 99.17 99.23 1140 99.29 99.18 99.22 1130 99.29 99.17 99.22 1120 99.28 99.16 99.22 1110 99.29 99.16 99.22 1100 99.29 99.17 99.22 1090 99.29 99.16 99.22 1080 99.28 99.16 99.21 1070 99.28 99.15 99.20 1060 99.29 99.16 99.21 1050 99.28 99.14 99.21 1040 99.27 99.15 99.20 1030 99.28 99.14 99.20 1020 99.27 99.15 99.19 1010 99.27 99.14 99.20 1000 99.26 99.13 99.19 990 99.27 99.14 99.18 980 99.28 99.13 99.17 970 99.26 99.13 99.19 960 99.26 99.13 99.18 950 99.27 99.12 99.18