BK1 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.510090 n_e = 1.512011	V_d = 63.34 V_e = 63.12	n_F - n_C = 0.008052 n_F' - n_C' = 0.008111	Coloring: 0.29 - 0.34 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.2508689 C2 = -0.00907651 C3 = 0.010845626 C4 = 0.00014118936 C5 = 0.0000013318603 C6 = 0.000000059688505

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.500739
n _s	1.503159
n _r	1.506201
n _C	1.507620
n _C'	1.508015
n _0.6328	1.508384
n _D	1.510018
n _d	1.510090
n _e	1.512011
n _F	1.515673
n _F'	1.516127
n _g	1.519998
n _h	1.523571
n _i	1.529629
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8545
P_C,A'	0.3552
P_d,C	0.3066
P_e,C	0.5452
P_g,d	1.2305
P_g,F	0.5371
P_h,g	0.4437
P_i,g	1.1961
P_C',t	0.9036
P_e,C'	0.4962
P_F',e	0.5111
P_i,F'	1.6768

transmittance: 10 mm
τ_0.29	0.032
τ_0.3	0.192
τ_0.31	0.47
τ_0.32	0.708
τ_0.33	0.782
τ_0.34	0.925
τ_0.35	0.963
τ_0.36	0.978
τ_0.37	0.985
τ_0.38	0.985
τ_0.39	0.995
τ_0.4	0.995
τ_0.42	0.995
τ_0.44	0.994
τ_0.46	0.995
τ_0.48	0.995
τ_0.5	0.997
τ_0.55	0.997
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.997
τ_1.5	0.994
τ₂	0.904

transmittance: 25 mm
τ_0.3	0.016
τ_0.31	0.151
τ_0.32	0.423
τ_0.33	0.541
τ_0.34	0.823
τ_0.35	0.91
τ_0.36	0.947
τ_0.37	0.964
τ_0.38	0.964
τ_0.39	0.989
τ_0.4	0.989
τ_0.42	0.989
τ_0.44	0.985
τ_0.46	0.989
τ_0.48	0.989
τ_0.5	0.992
τ_0.55	0.992
τ_0.6	0.992
τ_0.65	0.992
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.992
τ_1.5	0.985
τ₂	0.777

Poisson coef.: 0.212
Rigidity: 304 Pa*10⁸
Young module: 737 Pa*10⁸
Knoop hardness: 518
Abrasion: 110

Climatic resistance: 2
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	91