BSM25 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.658441 n_e = 1.661523	V_d = 50.86 V_e = 50.58	n_F - n_C = 0.012945 n_F' - n_C' = 0.013077	Coloring: 0.33 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.694748 C2 = -0.009564087 C3 = 0.019719188 C4 = 0.00013516953 C5 = 0.000032505531 C6 = -0.00000087994633

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.644460
n _s	1.647816
n _r	1.652352
n _C	1.654546
n _C'	1.655163
n _0.6328	1.655740
n _D	1.658326
n _d	1.658441
n _e	1.661523
n _F	1.667492
n _F'	1.668240
n _g	1.674680
n _h	1.680722
n _i	1.691165
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7790
P_C,A'	0.3381
P_d,C	0.3008
P_e,C	0.5389
P_g,d	1.2544
P_g,F	0.5553
P_h,g	0.4666
P_i,g	1.2733
P_C',t	0.8267
P_e,C'	0.4912
P_F',e	0.5188
P_i,F'	1.7708

transmittance: 10 mm
τ_0.38	0.933
τ_0.39	0.961
τ_0.4	0.976
τ_0.42	0.984
τ_0.44	0.985
τ_0.46	0.988
τ_0.48	0.992
τ_0.5	0.994
τ_0.55	0.997
τ_0.6	0.995
τ_0.65	0.994
τ_0.7	0.996

Poisson coef.: 0.274
Rigidity: 373 Pa*10⁸
Young module: 951 Pa*10⁸
Knoop hardness: 590
Abrasion: 123

Climatic resistance: 2
Resistance to acids: 5.2
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	66
100 ~ 300	80