Richardson Gratings 53-*-425E を用いた際の
オーダーの分かれ目            

(下表「右端」「左端」は効率が「中央」の半分になる場所、
黄色の行は図に plot してある次数)          

次数左端--中央--右端
431.0724751.0786751.0849461.0912911.097710
441.0483751.0542981.0602881.0663471.072475
451.0253341.0309981.0367261.0425181.048375
461.0032831.0087071.0141891.0197311.025334
470.9821620.9873580.9926100.9979181.003283
480.9619110.9668950.9719310.9770190.982162
490.9424780.9472630.9520960.9569780.961911
500.9238150.9284120.9330540.9377420.942478
510.9058770.9102960.9147580.9192650.923815
520.8886220.8928740.8971670.9015010.905877
530.8720130.8761070.8802390.8844110.888622
540.8560120.8599570.8639390.8679570.872013
550.8405890.8443920.8482310.8521040.856012
560.8257110.8293810.8330840.8368190.840589
570.8113510.8148940.8184680.8220740.825711
580.7974820.8009040.8043570.8078390.811351
590.7840790.7873870.7907230.7940880.797482
600.7711190.7743180.7775450.7807980.784079
610.7585800.7616760.7647980.7679450.771119
620.7464430.7494410.7524630.7555090.758580
630.7346880.7375920.7405190.7434690.746443
640.7232970.7261120.7289480.7318070.734688
650.7122550.7149840.7177340.7205050.723297
660.7015440.7041910.7068590.7095460.712255
670.6911510.6937200.6963090.6989170.701544
680.6810610.6835560.6860690.6886000.691151
690.6712620.6736850.6761260.6785840.681061
700.6617400.6640950.6664670.6688560.671262
710.6524850.6547740.6570800.6594020.661740
720.6434850.6457120.6479540.6502120.652485
730.6347300.6368970.6390780.6412740.643485
740.6262100.6283190.6304420.6325790.634730
750.6179160.6199690.6220360.6241160.626210
760.6098390.6118380.6138510.6158770.617916
770.6019700.6039180.6058790.6078530.609839
780.5943020.5962000.5981110.6000340.601970
790.5868260.5886770.5905400.5924150.594302
800.5795360.5813420.5831590.5849870.586826
810.5724260.5741870.5759590.5777420.579536
820.5654870.5672060.5689350.5706750.572426
830.5587150.5603930.5620800.5637790.565487
840.5521030.5537410.5553890.5570470.558715
850.5456450.5472460.5488550.5504740.552103
860.5393370.5409010.5424730.5440550.545645
870.5331730.5347010.5362380.5377830.539337
880.5271490.5286420.5301440.5316540.533173
890.5212590.5227190.5241870.5256640.527149
900.5154990.5169270.5183630.5198070.521259
910.5098650.5112620.5126670.5140790.515499
920.5043530.5057200.5070940.5084760.509865
930.4989590.5002970.5016420.5029940.504353
940.4936790.4949890.4963050.4976290.498959
950.4885100.4897920.4910810.4923770.493679
960.4834470.4847030.4859650.4872340.488510
970.4784890.4797190.4809550.4821980.483447
980.4736310.4748360.4760480.4772650.478489
990.4688710.4700520.4712390.4724320.473631
1000.4642060.4653630.4665270.4676960.468871
1010.4596320.4607670.4619080.4630540.464206
1020.4551480.4562610.4573790.4585030.459632
1030.4507510.4518420.4529390.4540410.455148
1040.4464370.4475080.4485830.4496640.450751
1050.4422060.4432560.4443110.4453720.446437
1060.4380530.4390840.4401200.4411600.442206
1070.4339780.4349900.4360060.4370270.438053
1080.4299790.4309720.4319690.4329720.433978
1090.4260520.4270270.4280060.4289900.429979
1100.4221960.4231540.4241150.4250810.426052
1110.4184100.4193500.4202940.4212430.422196
1120.4146900.4156140.4165420.4174740.418410
1130.4110370.4119440.4128560.4137710.414690
1140.4074470.4083390.4092340.4101330.411037
1150.4039190.4047950.4056750.4065590.407447
1160.4004520.4013130.4021780.4030470.403919
1170.3970440.3978910.3987410.3995950.400452
1180.3936940.3945260.3953620.3962010.397044
1190.3903990.3912170.3920390.3928650.393694
1200.3871590.3879640.3887720.3895840.390399
1210.3839730.3847640.3855590.3863580.387159
1220.3808380.3816170.3823990.3831840.383973
1230.3777550.3785210.3792900.3800630.380838
1240.3747200.3754740.3762310.3769910.377755
1250.3717350.3724760.3732210.3739690.374720
1260.3687960.3695260.3702590.3709950.371735
1270.3659030.3666220.3673440.3680680.368796
1280.3630560.3637640.3644740.3651870.365903
1290.3602520.3609490.3616490.3623510.363056
1300.3574920.3581780.3588670.3595580.360252
1310.3547730.3554490.3561270.3568080.357492
1320.3520960.3527610.3534290.3541000.354773
1330.3494580.3501140.3507720.3514330.352096