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BK7G18

Glass Code:  520636.252
SCHOTT Advanced Optics offers a variety of radiation resistant glass types with different dispersion properties. These glass types are well-suited to use in surroundings with high radioactivity.
optical glass klein 4zu3.jpg
Characteristics
nd 1.51975 νd 63.58
ne 1.52170 νe 63.36
nF-nC 0.008174 nF'-nC' 0.008233
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Download Data sheet BK7G18
Technical Details
Refractive Indices
Characteristics λ [nm]
n2,325.4 2,325.4 1.49203
n1,970.1 1,970.1 1.49777
n1,529.6 1,529.6 1.50373
n1,060.0 1,060.0 1.50953
nt 1,014.0 1.51015
ns 852.1 1.51267
nr 706.5 1.51579
nC 656.3 1.51724
nC' 643.8 1.51764
Characteristics λ [nm]
n632.8 632.8 1.51802
nD 589.3 1.51968
nd 587.6 1.51975
ne 546.1 1.52170
nF 486.1 1.52541
nF' 480.0 1.52587
ng 435.8 1.52981
nh 404.7 1.53345
ni 365.0 1.53970
Characteristics λ [nm]
n334.1 334.1
n312.6 312.6
n296.7 296.7
n280.4 280.4
n248.3 248.3
Internal Transmittance
Characteristics λ [nm]
τ25/2500 2,500 0.320
τ25/2325 2,325 0.540
τ25/1970 1,970 0.841
τ25/1530 1,530 0.979
τ25/1060 1,060 0.998
τ25/700 700 0.993
τ25/660 660 0.988
τ25/620 620 0.984
τ25/580 580 0.979
τ25/546 546 0.973
τ25/500 500 0.957
τ25/460 460 0.927
τ25/436 436 0.873
τ25/420 420 0.780
τ25/405 405 0.600
τ25/400 400 0.510
τ25/390 390 0.280
τ25/380 380 0.080
τ25/370 370
τ25/365 365
τ25/350 350
τ25/334 334
τ25/320 320
τ25/310 310
τ25/300 300
τ25/290 290
τ25/280 280
τ25/270 270
τ25/260 260
τ25/250 250
Characteristics λ [nm]
τ10/2500 2,500 0.634
τ10/2325 2,325 0.782
τ10/1970 1,970 0.933
τ10/1530 1,530 0.992
τ10/1060 1,060 0.999
τ10/700 700 0.997
τ10/660 660 0.995
τ10/620 620 0.994
τ10/580 580 0.992
τ10/546 546 0.989
τ10/500 500 0.982
τ10/460 460 0.970
τ10/436 436 0.947
τ10/420 420 0.905
τ10/405 405 0.815
τ10/400 400 0.764
τ10/390 390 0.601
τ10/380 380 0.360
τ10/370 370 0.080
τ10/365 365 0.020
τ10/350 350
τ10/334 334
τ10/320 320
τ10/310 310
τ10/300 300
τ10/290 290
τ10/280 280
τ10/270 270
τ10/260 260
τ10/250 250
Partial Dispersion
Characteristics
Ps,t 0.3077
PC,s 0.5591
Pd,C 0.3071
Pe,d 0.2385
Pg,F 0.5376
Pi,h 0.7640
P's,t 0.3055
P'C',s 0.6040
P'd,C' 0.2561
P'e,d 0.2368
P'g,F' 0.4777
P'i,h 0.7585
Characteristics
ΔPC,t 0.0203
ΔPC,s 0.0080
ΔPF,e -0.0006
ΔPg,F 0.0007
ΔPi,g 0.0189
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