BAL11 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.572501 n_e = 1.574863	V_d = 57.76 V_e = 57.49	n_F - n_C = 0.009911 n_F' - n_C' = 0.009998	Coloring: 0.31 - 0.35 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.4338072 C2 = -0.0093210518 C3 = 0.013973311 C4 = 0.00018047323 C5 = 0.0000077636369 C6 = -0.00000011848733

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.561407
n _s	1.564175
n _r	1.567779
n _C	1.569491
n _C'	1.569970
n _0.6328	1.570417
n _D	1.572412
n _d	1.572501
n _e	1.574863
n _F	1.579402
n _F'	1.579969
n _g	1.584816
n _h	1.589323
n _i	1.597033
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8156
P_C,A'	0.3463
P_d,C	0.3036
P_e,C	0.5419
P_g,d	1.2425
P_g,F	0.5461
P_h,g	0.4547
P_i,g	1.2325
P_C',t	0.8639
P_e,C'	0.4936
P_F',e	0.5151
P_i,F'	1.7216

transmittance: 10 mm
τ_0.36	0.935
τ_0.37	0.962
τ_0.38	0.971
τ_0.39	0.983
τ_0.4	0.99
τ_0.42	0.992
τ_0.44	0.992
τ_0.46	0.993
τ_0.48	0.995
τ_0.5	0.995
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.996
τ_0.7	0.997
τ_0.8	0.997
τ_0.9	0.997

Poisson coef.: 0.243
Rigidity: 322 Pa*10⁸
Young module: 801 Pa*10⁸
Knoop hardness: 510
Abrasion: 137

Climatic resistance: 2
Resistance to acids: 4.2
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	72
100 ~ 300	86

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.3
-20 ~ 0	t	2.2
0 ~ 20	t	2.3
20 ~ 40	t	2.4
40 ~ 60	t	2.5
60 ~ 80	t	2.7
-40 ~ -20	C'	2.7
-20 ~ 0	C'	2.7
0 ~ 20	C'	2.7
20 ~ 40	C'	2.8
40 ~ 60	C'	2.9
60 ~ 80	C'	3
-40 ~ -20		2.7
-20 ~ 0		2.7
0 ~ 20		2.7
20 ~ 40		2.8
40 ~ 60		2.9
60 ~ 80		3.1
-40 ~ -20	D	2.8
-20 ~ 0	D	2.8
0 ~ 20	D	2.9
20 ~ 40	D	3
40 ~ 60	D	3.1
60 ~ 80	D	3.3
-40 ~ -20	e	3
-20 ~ 0	e	3
0 ~ 20	e	3
20 ~ 40	e	3.1
40 ~ 60	e	3.3
60 ~ 80	e	3.4
-40 ~ -20	F	3.2
-20 ~ 0	F	3.3
0 ~ 20	F	3.4
20 ~ 40	F	3.6
40 ~ 60	F	3.8
60 ~ 80	F	4
-40 ~ -20	g	3.6
-20 ~ 0	g	3.6
0 ~ 20	g	3.8
20 ~ 40	g	3.9
40 ~ 60	g	4.1
60 ~ 80	g	4.4