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N-SF57HTULTRA

Glass Code:  847238.353

“N”-glass as an environmentally friendly alternative to conventional lead and arsenic-containing glass types.

HT & HTultra glasses feature enhanced transmission values in the visible spectral range, especially in the blue-violet range.

Find more information in the tabs below or on our website.

Compare glass types with our Interactive Abbe Diagram.

optical glass klein 4zu3.jpg
Characteristics
nd 1.84666 νd 23.78
ne 1.85504 νe 23.59
nF-nC 0.035604 nF'-nC' 0.036247
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Download Data sheet N-SF57HTULTRA
Technical Details
Refractive Indices
Characteristics λ [nm]
n2,325.4 2,325.4 1.78502
n1,970.1 1,970.1 1.79190
n1,529.6 1,529.6 1.80011
n1,060.0 1,060.0 1.81138
nt 1,014.0 1.81296
ns 852.1 1.82023
nr 706.5 1.83099
nC 656.3 1.83650
nC' 643.8 1.83807
Characteristics λ [nm]
n632.8 632.8 1.83956
nD 589.3 1.84635
nd 587.6 1.84666
ne 546.1 1.85504
nF 486.1 1.87210
nF' 480.0 1.87432
ng 435.8 1.89423
nh 404.7 1.91440
ni 365.0
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 0.584
τ25/2325 2,325 0.642
τ25/1970 1,970 0.893
τ25/1530 1,530 0.980
τ25/1060 1,060 0.998
τ25/700 700 0.988
τ25/660 660 0.985
τ25/620 620 0.983
τ25/580 580 0.981
τ25/546 546 0.973
τ25/500 500 0.947
τ25/460 460 0.908
τ25/436 436 0.864
τ25/420 420 0.805
τ25/405 405 0.693
τ25/400 400 0.627
τ25/390 390 0.413
τ25/380 380 0.114
τ25/370 370 0.001
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 0.806
τ10/2325 2,325 0.838
τ10/1970 1,970 0.956
τ10/1530 1,530 0.992
τ10/1060 1,060 0.999
τ10/700 700 0.995
τ10/660 660 0.994
τ10/620 620 0.993
τ10/580 580 0.992
τ10/546 546 0.989
τ10/500 500 0.978
τ10/460 460 0.962
τ10/436 436 0.943
τ10/420 420 0.917
τ10/405 405 0.864
τ10/400 400 0.830
τ10/390 390 0.702
τ10/380 380 0.420
τ10/370 370 0.063
τ10/365 365 0.003
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 0.2042
PC,s 0.4568
Pd,C 0.2855
Pe,d 0.2353
Pg,F 0.6216
Pi,h
P's,t 0.2005
P'C',s 0.4922
P'd,C' 0.2369
P'e,d 0.2311
P'g,F' 0.5493
P'i,h
Characteristics
ΔPC,t 0.0032
ΔPC,s -0.0015
ΔPF,e 0.0033
ΔPg,F 0.0178
ΔPi,g
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