635nm vs. 650nm

[Dingers]

Hi all,

as everyone knows a 635nm is much brighter than its 650nm brother.

However I, and I'm sure others too, have never quite understood how much brighter.

If anybody has any pictures comparing the two,
please post them up!

 

[Zom-B]

Sam's laser faq lists this table for relative intensity comparison:
[tt] Wavelength Relative Factor Color Type
----------------------------------------------------------------
555 nm 1.000 33 Green Reference peak
543.5 nm .974 30 " Green HeNe laser
532 nm .885 28 " Green DPSS laser
632.8 nm .237 8 Orange-red Red HeNe laser
635 nm .217 7 " Red diode laser
640 nm .175 5 " "
650 nm .107 3 Red "
660 nm .061 2 " "
670 nm .032 1 " "[/tt]

I also downloaded a list somewhere with the intensities preceived by the CIE 1931 Standard Observer. Wavelength with a multiple of 10nm are exact and the rest is interpolated. The list above corresponds precisely.

see http://en.wikipedia.org/wiki/CIE_1931_color_space (The data corresponds with the green line in the first image)

[tt]360 0.000003917000
361 0.000004393581
362 0.000004929604
363 0.000005532136
364 0.000006208245
365 0.000006965000
366 0.000007813219
367 0.000008767336
368 0.000009839844
369 0.00001104323
370 0.00001239000
371 0.00001388641
372 0.00001555728
373 0.00001744296
374 0.00001958375
375 0.00002202000
376 0.00002483965
377 0.00002804126
378 0.00003153104
379 0.00003521521
380 0.00003900000
381 0.00004282640
382 0.00004691460
383 0.00005158960
384 0.00005717640
385 0.00006400000
386 0.00007234421
387 0.00008221224
388 0.00009350816
389 0.0001061361
390 0.0001200000
391 0.0001349840
392 0.0001514920
393 0.0001702080
394 0.0001918160
395 0.0002170000
396 0.0002469067
397 0.0002812400
398 0.0003185200
399 0.0003572667
400 0.0003960000
401 0.0004337147
402 0.0004730240
403 0.0005178760
404 0.0005722187
405 0.0006400000
406 0.0007245600
407 0.0008255000
408 0.0009411600
409 0.001069880
410 0.001210000
411 0.001362091
412 0.001530752
413 0.001720368
414 0.001935323
415 0.002180000
416 0.002454800
417 0.002764000
418 0.003117800
419 0.003526400
420 0.004000000
421 0.004546240
422 0.005159320
423 0.005829280
424 0.006546160
425 0.007300000
426 0.008086507
427 0.008908720
428 0.009767680
429 0.01066443
430 0.01160000
431 0.01257317
432 0.01358272
433 0.01462968
434 0.01571509
435 0.01684000
436 0.01800736
437 0.01921448
438 0.02045392
439 0.02171824
440 0.02300000
441 0.02429461
442 0.02561024
443 0.02695857
444 0.02835125
445 0.02980000
446 0.03131083
447 0.03288368
448 0.03452112
449 0.03622571
450 0.03800000
451 0.03984667
452 0.04176800
453 0.04376600
454 0.04584267
455 0.04800000
456 0.05024368
457 0.05257304
458 0.05498056
459 0.05745872
460 0.06000000
461 0.06260197
462 0.06527752
463 0.06804208
464 0.07091109
465 0.07390000
466 0.07701600
467 0.08026640
468 0.08366680
469 0.08723280
470 0.09098000
471 0.09491755
472 0.09904584
473 0.1033674
474 0.1078846
475 0.1126000
476 0.1175320
477 0.1226744
478 0.1279928
479 0.1334528
480 0.1390200
481 0.1446764
482 0.1504693
483 0.1564619
484 0.1627177
485 0.1693000
486 0.1762431
487 0.1835581
488 0.1912735
489 0.1994180
490 0.2080200
491 0.2171199
492 0.2267345
493 0.2368571
494 0.2474812
495 0.2586000
496 0.2701849
497 0.2822939
498 0.2950505
499 0.3085780
500 0.3230000
501 0.3384021
502 0.3546858
503 0.3716986
504 0.3892875
505 0.4073000
506 0.4256299
507 0.4443096
508 0.4633944
509 0.4829395
510 0.5030000
511 0.5235693
512 0.5445120
513 0.5656900
514 0.5869653
515 0.6082000
516 0.6293456
517 0.6503068
518 0.6708752
519 0.6908424
520 0.7100000
521 0.7281852
522 0.7454636
523 0.7619694
524 0.7778368
525 0.7932000
526 0.8081104
527 0.8224962
528 0.8363068
529 0.8494916
530 0.8620000
531 0.8738108
532 0.8849624
533 0.8954936
534 0.9054432
535 0.9148501
536 0.9237348
537 0.9320924
538 0.9399226
539 0.9472252
540 0.9540000
541 0.9602561
542 0.9660074
543 0.9712606
544 0.9760225
545 0.9803000
546 0.9840924
547 0.9874182
548 0.9903128
549 0.9928116
550 0.9949501
551 0.9967108
552 0.9980983
553 0.9991120
554 0.9997482
555 1.000000
556 0.9998567
557 0.9993046
558 0.9983255
559 0.9968987
560 0.9950000
561 0.9926005
562 0.9897426
563 0.9864444
564 0.9827241
565 0.9786000
566 0.9740837
567 0.9691712
568 0.9638568
569 0.9581349
570 0.9520000
571 0.9454504
572 0.9384992
573 0.9311628
574 0.9234576
575 0.9154000
576 0.9070064
577 0.8982772
578 0.8892048
579 0.8797816
580 0.8700000
581 0.8598613
582 0.8493920
583 0.8386220
584 0.8275813
585 0.8163000
586 0.8047947
587 0.7930820
588 0.7811920
589 0.7691547
590 0.7570000
591 0.7447541
592 0.7324224
593 0.7200036
594 0.7074965
595 0.6949000
596 0.6822192
597 0.6694716
598 0.6566744
599 0.6438448
600 0.6310000
601 0.6181555
602 0.6053144
603 0.5924756
604 0.5796379
605 0.5668000
606 0.5539611
607 0.5411372
608 0.5283528
609 0.5156323
610 0.5030000
611 0.4904688
612 0.4780304
613 0.4656776
614 0.4534032
615 0.4412000
616 0.4290800
617 0.4170360
618 0.4050320
619 0.3930320
620 0.3810000
621 0.3689184
622 0.3568272
623 0.3447768
624 0.3328176
625 0.3210000
626 0.3093381
627 0.2978504
628 0.2865936
629 0.2756245
630 0.2650000
631 0.2547632
632 0.2448896
633 0.2353344
634 0.2260528
635 0.2170000
636 0.2081616
637 0.1995488
638 0.1911552
639 0.1829744
640 0.1750000
641 0.1672235
642 0.1596464
643 0.1522776
644 0.1451259
645 0.1382000
646 0.1315003
647 0.1250248
648 0.1187792
649 0.1127691
650 0.1070000
651 0.1014762
652 0.09618864
653 0.09112296
654 0.08626485
655 0.08160000
656 0.07712064
657 0.07282552
658 0.06871008
659 0.06476976
660 0.06100000
661 0.05739621
662 0.05395504
663 0.05067376
664 0.04754965
665 0.04458000
666 0.04175872
667 0.03908496
668 0.03656384
669 0.03420048
670 0.03200000
671 0.02996261
672 0.02807664
673 0.02632936
674 0.02470805
675 0.02320000
676 0.02180077
677 0.02050112
678 0.01928108
679 0.01812069
680 0.01700000
681 0.01590379
682 0.01483718
683 0.01381068
684 0.01283478
685 0.01192000
686 0.01106831
687 0.01027339
688 0.009533311
689 0.008846157
690 0.008210000
691 0.007623781
692 0.007085424
693 0.006591476
694 0.006138485
695 0.005723000
696 0.005343059
697 0.004995796
698 0.004676404
699 0.004380075
700 0.004102000
701 0.003838453
702 0.003589099
703 0.003354219
704 0.003134093
705 0.002929000
706 0.002738139
707 0.002559876
708 0.002393244
709 0.002237275
710 0.002091000
711 0.001953587
712 0.001824580
713 0.001703580
714 0.001590187
715 0.001484000
716 0.001384496
717 0.001291268
718 0.001204092
719 0.001122744
720 0.001047000
721 0.0009765896
722 0.0009111088
723 0.0008501332
724 0.0007932384
725 0.0007400000
726 0.0006900827
727 0.0006433100
728 0.0005994960
729 0.0005584547
730 0.0005200000
731 0.0004839136
732 0.0004500528
733 0.0004183452
734 0.0003887184
735 0.0003611000
736 0.0003353835
737 0.0003114404
738 0.0002891656
739 0.0002684539
740 0.0002492000
741 0.0002313019
742 0.0002146856
743 0.0001992884
744 0.0001850475
745 0.0001719000
746 0.0001597781
747 0.0001486044
748 0.0001383016
749 0.0001287925
750 0.0001200000
751 0.0001118595
752 0.0001043224
753 0.00009733560
754 0.00009084587
755 0.00008480000
756 0.00007914667
757 0.00007385800
758 0.00006891600
759 0.00006430267
760 0.00006000000
761 0.00005598187
762 0.00005222560
763 0.00004871840
764 0.00004544747
765 0.00004240000
766 0.00003956104
767 0.00003691512
768 0.00003444868
769 0.00003214816
770 0.00003000000
771 0.00002799125
772 0.00002611356
773 0.00002436024
774 0.00002272461
775 0.00002120000
776 0.00001977855
777 0.00001845285
778 0.00001721687
779 0.00001606459
780 0.00001499000
781 0.00001398728
782 0.00001305155
783 0.00001217818
784 0.00001136254
785 0.00001060000
786 0.000009885877
787 0.000009217304
788 0.000008592362
789 0.000008009133
790 0.000007465700
791 0.000006959567
792 0.000006487995
793 0.000006048699
794 0.000005639396
795 0.000005257800
796 0.000004901771
797 0.000004569720
798 0.000004260194
799 0.000003971739
800 0.000003702900
801 0.000003452163
802 0.000003218302
803 0.000003000300
804 0.000002797139
805 0.000002607800
806 0.000002431220
807 0.000002266531
808 0.000002113013
809 0.000001969943
810 0.000001836600
811 0.000001712230
812 0.000001596228
813 0.000001488090
814 0.000001387314
815 0.000001293400
816 0.000001205820
817 0.000001124143
818 0.000001048009
819 0.000000977058
820 0.000000910930
821 0.000000849251
822 0.000000791721
823 0.000000738090
824 0.000000688110
825 0.000000641530
826 0.000000598090
827 0.000000557575
828 0.000000519808
829 0.000000484612
830 0.000000451810
[/tt]