BPH40 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.676498 n_e = 1.680772	V_d = 37.53 V_e = 37.29	n_F - n_C = 0.018021 n_F' - n_C' = 0.018252	Coloring: 0.34 - 0.40 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.737477 C2 = -0.013153125 C3 = 0.023895273 C4 = 0.0011078302 C5 = -0.00004881918 C6 = 0.0000054773972

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.657770
n _s	1.662176
n _r	1.668209
n _C	1.671171
n _C'	1.672009
n _0.6328	1.672795
n _D	1.676340
n _d	1.676498
n _e	1.680772
n _F	1.689193
n _F'	1.690261
n _g	1.699577
n _h	1.708528
n _i	1.724592
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7435
P_C,A'	0.3262
P_d,C	0.2955
P_e,C	0.5327
P_g,d	1.2806
P_g,F	0.5761
P_h,g	0.4966
P_i,g	1.3880
P_C',t	0.7900
P_e,C'	0.4862
P_F',e	0.5265
P_i,F'	1.9049

transmittance: 10 mm
τ_0.4	0.924
τ_0.42	0.974
τ_0.44	0.988
τ_0.46	0.993
τ_0.48	0.996
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998

Poisson coef.: 0.275
Rigidity: 271 Pa*10⁸
Young module: 691 Pa*10⁸
Knoop hardness: 460
Abrasion: 116

Climatic resistance: 3
Resistance to acids: 52.1
Phosphate resistance: 4.1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	53
100 ~ 300	64

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	6.1
-20 ~ 0	C'	6.2
0 ~ 20	C'	6.3
20 ~ 40	C'	6.6
40 ~ 60	C'	6.8
60 ~ 80	C'	7.1
-40 ~ -20	D	6.4
-20 ~ 0	D	6.5
0 ~ 20	D	6.7
20 ~ 40	D	6.9
40 ~ 60	D	7.2
60 ~ 80	D	7.4
-40 ~ -20	e	6.7
-20 ~ 0	e	6.8
0 ~ 20	e	7
20 ~ 40	e	7.2
40 ~ 60	e	7.5
60 ~ 80	e	7.8
-40 ~ -20	F	7.5
-20 ~ 0	F	7.6
0 ~ 20	F	7.8
20 ~ 40	F	8
40 ~ 60	F	8.3
60 ~ 80	F	8.6
-40 ~ -20	g	8.3
-20 ~ 0	g	8.4
0 ~ 20	g	8.7
20 ~ 40	g	9
40 ~ 60	g	9.3
60 ~ 80	g	9.7