MIL-DTL-43511D
4.4.2 Refractive power test. The refractive power shall be determined with any suitable
instrument with increments of 0.01 diopters for spherical and cylindrical powers. The aperture
over the test items shall not exceed 1 centimeter. If the instrument used cannot measure
astigmatic components, then the target pattern shall be a fixed spoke wheel, with a minimum of
24 spokes.
4.4.3 Luminous transmittance test. The transmittance shall be measured through point "C" (see
3.4) for left and right eye, using a calibrated National Institute of Standards and Technology
(NIST) traceable spectrophotometer with a spectral bandwidth < 10 nm. Table III shows an
example calculation of the photopic and scotopic luminous transmittance.
TABLE III. Sample calculation for luminous transmittance 1/ 2/ 3/ 4/ 5/
V(λ)
V(λ′)
V(λ)*T
V(λ′)*T
Wavelength
Sample T
(nm)
380
0.00004
0.00059
0.00003
0.00000
0.00000
390
0.00012
0.00221
0.12361
0.00001
0.00027
400
0.00040
0.00929
0.65772
0.00026
0.00611
410
0.00120
0.03484
0.83508
0.00100
0.02909
420
0.00400
0.09660
0.86258
0.00345
0.08333
430
0.01160
0.19980
0.87339
0.01013
0.17450
440
0.02300
0.32810
0.87927
0.02022
0.28849
450
0.03800
0.45500
0.88191
0.03351
0.40127
460
0.06000
0.56720
0.88449
0.05307
0.50169
470
0.09100
0.67560
0.88644
0.08067
0.59888
480
0.13900
0.79300
0.88830
0.12347
0.70442
490
0.20800
0.90430
0.88673
0.18444
0.80187
500
0.32300
0.98170
0.88690
0.28647
0.87067
510
0.50300
0.99660
0.89154
0.44844
0.88851
520
0.71000
0.93520
0.89110
0.63268
0.83336
530
0.86200
0.81100
0.88666
0.76430
0.71908
540
0.95400
0.64970
0.88772
0.84689
0.57675
550
0.99500
0.48080
0.88991
0.88546
0.42787
560
0.99500
0.32880
0.88619
0.88176
0.29138
570
0.95200
0.20760
0.89049
0.84775
0.18487
580
0.87000
0.12100
0.88132
0.76675
0.10664
590
0.75700
0.06550
0.88939
0.67327
0.05826
600
0.63100
0.03325
0.88914
0.56105
0.02956
610
0.50300
0.01593
0.89237
0.44886
0.01422
620
0.38100
0.00737
0.89093
0.33944
0.00657
630
0.26500
0.00334
0.89280
0.23659
0.00298
640
0.17500
0.00150
0.88936
0.15564
0.00133
650
0.10700
0.00068
0.90356
0.09668
0.00061
660
0.06100
0.00031
0.89687
0.05471
0.00028
670
0.03200
0.00015
0.91225
0.02919
0.00014
680
0.01700
0.00007
0.90045
0.01531
0.00006
690
0.00820
0.00004
0.90968
0.00746
0.00004
700
0.00410
0.00002
0.91164
0.00374
0.00002
710
0.00210
0.00000
0.90284
0.00190
0.00000
720
0.00100
0.00000
0.91709
0.00092
0.00000
730
0.00050
0.00000
0.91137
0.00046
0.00000
740
0.00030
0.00000
0.90570
0.00027
0.00000
750
0.00010
0.00000
0.92346
0.00009
0.00000
760
0.00010
0.00000
0.91446
0.00009
0.00000
TOTALS
10.686
9.707
32.905
9.496
8.603
9
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