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N-BAK4HT  569560.305

optical glass klein 4zu3.jpg

“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.

Characteristics
nd 1.56883 νd 55.98
ne 1.57125 νe 55.70
nF-nC 0.010162 nF'-nC' 0.010255
Glass type
Article L
W
T
DIA
nd
vd
STEP
nd
STEP
vd
Weight
Characteristics λ [nm]
n2,325.4 2,325.4 1.54044
n1,970.1 1,970.1 1.54561
n1,529.6 1,529.6 1.55111
n1,060.0 1,060.0 1.55688
nt 1,014.0 1.55755
ns 852.1 1.56034
nr 706.5 1.56400
nC 656.3 1.56575
nC' 643.8 1.56624
Characteristics λ [nm]
n632.8 632.8 1.56670
nD 589.3 1.56874
nd 587.6 1.56883
ne 546.1 1.57125
nF 486.1 1.57591
nF' 480.0 1.57649
ng 435.8 1.58149
nh 404.7 1.58614
ni 365.0 1.59415
Characteristics λ [nm]
n334.1 334.1
n312.6 312.6
n296.7 296.7
n280.4 280.4
n248.3 248.3
Characteristics λ [nm]
τ25/2500 2,500 0.673
τ25/2325 2,325 0.811
τ25/1970 1,970 0.949
τ25/1530 1,530 0.991
τ25/1060 1,060 0.998
τ25/700 700 0.996
τ25/660 660 0.996
τ25/620 620 0.996
τ25/580 580 0.996
τ25/546 546 0.996
τ25/500 500 0.995
τ25/460 460 0.993
τ25/436 436 0.992
τ25/420 420 0.991
τ25/405 405 0.985
τ25/400 400 0.983
τ25/390 390 0.972
τ25/380 380 0.949
τ25/370 370 0.900
τ25/365 365 0.859
τ25/350 350 0.595
τ25/334 334 0.095
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 0.854
τ10/2325 2,325 0.920
τ10/1970 1,970 0.979
τ10/1530 1,530 0.996
τ10/1060 1,060 0.999
τ10/700 700 0.998
τ10/660 660 0.998
τ10/620 620 0.998
τ10/580 580 0.998
τ10/546 546 0.998
τ10/500 500 0.998
τ10/460 460 0.997
τ10/436 436 0.997
τ10/420 420 0.996
τ10/405 405 0.994
τ10/400 400 0.993
τ10/390 390 0.989
τ10/380 380 0.979
τ10/370 370 0.959
τ10/365 365 0.941
τ10/350 350 0.812
τ10/334 334 0.390
τ10/320 320 0.015
τ10/310 310
τ10/300 300
τ10/290 290
τ10/280 280
τ10/270 270
τ10/260 260
τ10/250 250
Characteristics
Ps,t 0.2749
PC,s 0.5321
Pd,C 0.3029
Pe,d 0.2383
Pg,F 0.5487
Pi,h 0.7879
P's,t 0.2724
P'C',s 0.5750
P'd,C' 0.2524
P'e,d 0.2361
P'g,F' 0.4869
P'i,h 0.7807
Characteristics
ΔPC,t -0.0034
ΔPC,s -0.0013
ΔPF,e -0.0001
ΔPg,F -0.0010
ΔPi,g -0.0087