BSM 7 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.607291 n_e = 1.609730	V_d = 59.37 V_e = 59.10	n_F - n_C = 0.010227 n_F' - n_C' = 0.010316	Coloring: 0.30 - 0.36 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.5432134 C2 = -0.0102068 C3 = 0.013983216 C4 = 0.00045963235 C5 = -0.000032963243 C6 = 0.0000019413424

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.595846
n _s	1.598703
n _r	1.602417
n _C	1.604183
n _C'	1.604678
n _0.6328	1.605140
n _D	1.607200
n _d	1.607291
n _e	1.609730
n _F	1.614411
n _F'	1.614994
n _g	1.619972
n _h	1.624583
n _i	1.632458
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8151
P_C,A'	0.3460
P_d,C	0.3038
P_e,C	0.5423
P_g,d	1.2397
P_g,F	0.5436
P_h,g	0.4508
P_i,g	1.2207
P_C',t	0.8634
P_e,C'	0.4940
P_F',e	0.5146
P_i,F'	1.7074

transmittance: 10 mm
τ_0.36	0.922
τ_0.37	0.954
τ_0.38	0.972
τ_0.39	0.98
τ_0.4	0.987
τ_0.42	0.992
τ_0.44	0.993
τ_0.46	0.994
τ_0.48	0.996
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.997

Poisson coef.: 0.263
Rigidity: 325 Pa*10⁸
Young module: 822 Pa*10⁸
Knoop hardness: 540
Abrasion: 131

Climatic resistance: 3
Resistance to acids: 51.2
Phosphate resistance: 2.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	65
100 ~ 300	76

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	2.7
-20 ~ 0	C'	2.6
0 ~ 20	C'	2.7
20 ~ 40	C'	2.8
40 ~ 60	C'	2.9
60 ~ 80	C'	3.1
-40 ~ -20	D	2.8
-20 ~ 0	D	2.8
0 ~ 20	D	2.8
20 ~ 40	D	2.9
40 ~ 60	D	3
60 ~ 80	D	3.2
-40 ~ -20	e	2.9
-20 ~ 0	e	2.9
0 ~ 20	e	2.9
20 ~ 40	e	3.1
40 ~ 60	e	3.2
60 ~ 80	e	3.4
-40 ~ -20	F	3.3
-20 ~ 0	F	3.2
0 ~ 20	F	3.3
20 ~ 40	F	3.4
40 ~ 60	F	3.5
60 ~ 80	F	3.7
-40 ~ -20	g	3.5
-20 ~ 0	g	3.5
0 ~ 20	g	3.6
20 ~ 40	g	3.7
40 ~ 60	g	3.9
60 ~ 80	g	4.1