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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    Article Details
     
    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