# Subaru Telescope Primary Mirror In-Situ Measured Reflectivity # Coated with Aluminum on 2022-08-04 # Opened the vacuum chamber on 2022-08-08 # Measured with Subaru Portable Spectrophotometer (SPS) on 2023-08-02 (363 days after) # Measured three times at around the position 3 # Data between 950 nm and 1650 nm are also available (SPS-XWW). # Contact: Hirofumi Okita (okita14@naoj.org) # # Wavelength (nm) Pos.3 #1 Pos.3 #2 Pos.3 #3 1000 91.69 92.06 92.18 998 91.84 90.99 90.79 996 91.36 92.07 91.07 994 90.96 91.52 91.87 992 91.10 91.22 91.00 990 91.89 90.57 91.41 988 91.31 91.66 91.67 986 91.54 91.86 91.98 984 90.42 90.92 92.01 982 90.26 91.39 91.81 980 90.77 91.58 92.24 978 90.67 92.06 91.73 976 91.23 91.30 91.70 974 91.19 91.27 91.40 972 91.16 91.61 91.63 970 90.81 91.02 90.91 968 91.04 91.29 91.83 966 90.32 90.41 91.16 964 90.67 91.48 91.07 962 90.65 90.99 89.58 960 90.26 91.15 91.03 958 90.49 90.85 90.55 956 90.39 90.79 90.40 954 89.29 90.72 91.54 952 89.84 90.52 90.16 950 89.78 90.91 89.68 948 89.23 90.41 90.20 946 89.91 90.59 90.47 944 89.23 89.90 90.90 942 89.62 90.09 90.49 940 90.09 89.85 90.01 938 89.69 90.11 89.72 936 89.44 89.72 89.67 934 89.35 90.01 89.75 932 89.50 89.71 89.20 930 89.04 89.38 89.80 928 88.75 89.63 89.56 926 88.97 89.00 89.11 924 88.52 89.71 89.18 922 88.14 89.47 88.71 920 88.78 88.83 88.79 918 89.16 89.12 88.92 916 88.43 88.71 88.54 914 87.74 88.77 88.82 912 87.68 88.53 88.94 910 88.02 88.37 88.17 908 88.12 88.66 88.26 906 87.69 88.02 87.83 904 87.62 88.08 88.22 902 87.65 87.92 87.81 900 87.26 88.02 87.65 898 87.45 87.36 87.42 896 87.10 87.51 87.64 894 87.14 87.35 87.29 892 86.78 87.10 86.96 890 86.83 87.29 87.04 888 86.62 87.02 86.80 886 86.19 86.86 86.76 884 86.34 86.78 86.33 882 86.15 86.37 86.87 880 85.98 86.35 86.26 878 85.81 86.00 85.90 876 85.79 85.68 85.94 874 85.41 85.69 86.18 872 85.41 85.61 85.58 870 85.10 85.66 85.44 868 85.02 85.30 85.30 866 84.74 85.16 85.18 864 84.75 84.92 85.46 862 84.44 84.91 85.14 860 84.35 84.98 85.17 858 84.47 84.85 84.84 856 84.36 84.55 84.86 854 84.23 84.51 84.75 852 84.10 84.24 84.96 850 84.01 84.52 84.41 848 83.87 84.28 84.30 846 83.55 84.36 83.95 844 83.28 84.16 83.65 842 83.60 83.80 84.31 840 83.41 83.89 83.87 838 83.89 84.25 84.06 836 83.56 84.28 83.91 834 83.65 84.19 83.76 832 83.46 84.15 83.86 830 83.06 83.96 83.96 828 83.31 83.90 83.91 826 83.59 83.72 83.97 824 83.48 83.61 83.97 822 83.05 83.48 83.73 820 83.48 84.05 83.84 818 83.39 83.78 83.72 816 83.20 83.76 83.98 814 83.16 83.96 83.96 812 83.76 83.89 83.88 810 83.81 84.43 83.67 808 83.73 83.88 84.19 806 83.53 84.14 83.95 804 83.86 84.16 84.03 802 84.04 84.52 84.03 800 83.97 84.52 84.17 798 83.69 84.37 84.66 796 83.99 84.57 84.57 794 84.12 84.39 84.74 792 83.84 84.62 84.40 790 84.54 84.81 84.66 788 84.48 84.72 84.79 786 84.30 84.62 84.90 784 84.75 84.79 85.00 782 84.28 85.16 84.78 780 84.72 85.06 85.10 778 85.00 85.03 85.09 776 85.03 84.99 85.07 774 84.82 85.29 85.19 772 84.63 85.20 85.13 770 85.43 85.37 85.32 768 84.99 85.66 85.42 766 85.12 85.48 85.77 764 85.42 85.58 85.64 762 85.34 85.90 85.56 760 85.62 86.03 85.95 758 85.49 85.95 85.88 756 85.72 86.24 85.82 754 85.55 86.00 86.16 752 86.01 85.87 86.02 750 85.86 86.16 86.04 748 85.87 86.06 86.44 746 85.80 86.38 86.22 744 86.13 86.32 86.67 742 86.16 86.28 86.54 740 86.10 86.53 86.47 738 85.96 86.61 86.54 736 86.30 86.60 86.54 734 86.31 86.55 86.64 732 86.41 86.61 86.58 730 86.50 86.74 86.95 728 86.77 86.96 86.90 726 86.61 86.69 86.92 724 86.78 86.91 86.55 722 86.61 87.00 87.03 720 86.48 87.07 87.04 718 86.71 86.95 87.39 716 86.92 87.19 87.23 714 86.82 87.16 86.81 712 86.79 87.40 87.42 710 86.92 87.42 87.33 708 86.99 87.26 87.23 706 87.23 87.19 87.50 704 87.06 86.91 87.41 702 87.14 87.55 87.33 700 86.92 87.42 87.47 698 87.32 87.45 87.59 696 87.36 87.50 87.72 694 87.28 87.46 87.58 692 87.41 87.42 87.53 690 87.45 87.58 87.77 688 87.46 87.65 87.78 686 87.22 87.85 87.86 684 87.41 87.60 87.88 682 87.45 87.82 87.80 680 87.49 87.95 87.88 678 87.56 87.60 88.06 676 87.52 87.69 87.82 674 87.68 87.83 87.85 672 87.54 87.74 87.99 670 87.69 87.86 88.00 668 87.98 87.97 87.84 666 87.67 88.22 87.87 664 87.67 88.16 88.06 662 87.83 88.10 88.15 660 87.79 88.22 88.18 658 87.74 88.16 88.18 656 87.92 88.21 88.34 654 87.81 88.24 88.35 652 87.90 88.36 88.28 650 88.14 88.38 88.33 648 88.15 88.39 88.34 646 88.04 88.47 88.26 644 88.23 88.16 88.48 642 87.96 88.22 88.69 640 87.92 88.29 88.56 638 88.24 88.65 88.61 636 88.09 88.50 88.59 634 88.27 88.28 88.49 632 88.19 88.22 88.55 630 88.18 88.54 88.66 628 88.29 88.63 88.74 626 88.17 88.56 88.65 624 88.30 88.47 88.66 622 88.30 88.55 88.82 620 88.30 88.80 88.79 618 88.40 88.69 88.80 616 88.43 88.65 88.83 614 88.23 88.64 88.62 612 88.30 88.50 88.69 610 88.20 88.60 88.87 608 88.55 88.73 88.70 606 88.45 88.64 88.93 604 88.48 88.88 88.97 602 88.47 88.85 88.75 600 88.69 88.75 88.83 598 88.59 88.92 88.92 596 88.63 88.81 89.04 594 88.44 88.84 89.12 592 88.61 88.78 88.84 590 88.60 88.83 89.01 588 88.65 88.78 89.13 586 88.61 88.93 89.03 584 88.45 89.06 88.94 582 88.63 89.05 88.96 580 88.56 89.10 89.13 578 88.67 88.88 89.06 576 88.81 89.20 89.33 574 88.65 88.95 89.41 572 88.75 89.05 89.24 570 88.69 88.90 89.15 568 88.49 89.00 89.13 566 88.65 89.07 89.27 564 88.53 88.98 89.17 562 88.68 89.11 89.34 560 88.95 89.27 89.27 558 88.63 89.11 89.48 556 88.82 89.09 89.32 554 88.84 88.98 89.25 552 88.86 89.03 89.11 550 89.07 89.12 89.23 548 89.00 89.24 89.37 546 88.96 89.22 89.40 544 89.03 89.22 89.32 542 88.90 89.39 89.51 540 88.91 89.12 89.36 538 88.82 89.25 89.43 536 88.88 89.40 89.32 534 88.89 89.40 89.24 532 89.05 89.30 89.29 530 88.85 89.25 89.44 528 88.89 89.19 89.70 526 88.87 89.20 89.43 524 88.81 89.27 89.40 522 88.77 89.35 89.14 520 88.81 89.10 89.44 518 89.15 89.30 89.52 516 88.97 89.21 89.22 514 89.20 89.39 89.65 512 88.96 89.18 89.44 510 89.07 89.24 89.55 508 88.77 89.30 89.56 506 89.09 89.15 89.39 504 89.13 89.23 89.26 502 89.16 89.30 89.46 500 89.24 88.97 89.65 498 89.10 89.63 89.73 496 89.17 89.32 89.51 494 89.16 89.47 89.79 492 89.15 89.04 89.51 490 88.91 89.54 89.28 488 89.00 89.20 89.52 486 89.04 89.55 89.39 484 89.03 89.48 89.58 482 89.30 89.33 89.31 480 89.39 89.30 89.43 478 89.16 89.60 89.12 476 89.17 88.92 89.46 474 88.97 89.43 89.47 472 89.01 89.34 89.50 470 89.22 89.12 89.69 468 89.00 89.28 89.47 466 89.04 89.35 89.29 464 89.02 89.41 89.39 462 89.24 89.50 89.59 460 89.16 89.56 89.61 458 89.05 89.33 89.53 456 89.01 89.43 89.32 454 89.05 89.23 89.12 452 89.17 88.95 89.34 450 89.24 89.65 89.61 448 89.22 88.81 89.45 446 89.24 89.14 89.88 444 88.89 89.43 89.44 442 88.98 89.68 89.80 440 88.82 89.59 89.42 438 89.15 89.99 89.30 436 89.47 89.02 89.75 434 89.19 89.63 89.60 432 88.80 89.34 89.69 430 89.10 89.15 89.86 428 89.04 89.29 89.90 426 88.85 89.65 89.46 424 88.96 89.59 89.62 422 89.08 89.38 89.78 420 89.15 89.46 89.66 418 89.54 89.43 89.46 416 89.03 89.26 89.40 414 89.93 88.95 89.39 412 89.06 89.50 89.91 410 89.28 89.21 89.78 408 89.54 89.68 89.81 406 88.95 89.64 89.49 404 88.80 88.98 89.25 402 89.54 89.36 89.67 400 89.43 89.37 89.59 398 89.33 89.65 89.39 396 88.39 89.43 89.58 394 89.26 89.28 89.17 392 89.32 89.95 89.64 390 88.58 88.62 90.22 388 89.01 89.17 89.40 386 88.59 89.25 89.31 384 88.83 89.19 89.83 382 89.23 88.62 89.43 380 88.32 88.64 89.41 1650 95.62 95.87 95.88 1640 95.64 95.88 95.91 1630 95.64 95.89 95.92 1620 95.63 95.88 95.92 1610 95.65 95.89 95.93 1600 95.65 95.89 95.94 1590 95.64 95.88 95.91 1580 95.63 95.88 95.91 1570 95.62 95.87 95.92 1560 95.63 95.88 95.90 1550 95.61 95.85 95.90 1540 95.60 95.86 95.88 1530 95.59 95.83 95.87 1520 95.58 95.83 95.86 1510 95.56 95.81 95.85 1500 95.56 95.79 95.83 1490 95.53 95.78 95.82 1480 95.53 95.76 95.79 1470 95.50 95.75 95.78 1460 95.48 95.73 95.77 1450 95.46 95.71 95.75 1440 95.44 95.70 95.74 1430 95.42 95.67 95.71 1420 95.39 95.65 95.69 1410 95.38 95.64 95.66 1400 95.36 95.62 95.65 1390 95.34 95.59 95.63 1380 95.31 95.57 95.61 1370 95.29 95.55 95.58 1360 95.26 95.52 95.55 1350 95.24 95.49 95.53 1340 95.21 95.47 95.50 1330 95.17 95.43 95.47 1320 95.15 95.42 95.44 1310 95.11 95.38 95.41 1300 95.08 95.36 95.38 1290 95.05 95.32 95.35 1280 95.02 95.28 95.31 1270 94.98 95.26 95.28 1260 94.95 95.22 95.24 1250 94.90 95.18 95.20 1240 94.86 95.14 95.15 1230 94.81 95.09 95.12 1220 94.77 95.05 95.07 1210 94.71 95.00 95.02 1200 94.67 94.95 94.97 1190 94.60 94.89 94.92 1180 94.55 94.83 94.85 1170 94.49 94.77 94.79 1160 94.42 94.70 94.72 1150 94.34 94.64 94.65 1140 94.27 94.56 94.57 1130 94.20 94.47 94.49 1120 94.10 94.39 94.42 1110 94.02 94.29 94.32 1100 93.91 94.20 94.22 1090 93.79 94.09 94.12 1080 93.67 93.97 93.99 1070 93.54 93.84 93.85 1060 93.39 93.70 93.72 1050 93.24 93.53 93.57 1040 93.06 93.37 93.40 1030 92.89 93.18 93.21 1020 92.69 92.99 93.00 1010 92.45 92.76 92.79 1000 92.20 92.50 92.55 990 91.93 92.24 92.27 980 91.62 91.94 91.97 970 91.30 91.60 91.63 960 90.91 91.23 91.23 950 90.49 90.80 90.81