E-FD7 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.639799 n_e = 1.644178	V_d = 34.57 V_e = 34.30	n_F - n_C = 0.018507 n_F' - n_C' = 0.018776	Coloring: 0.36 - 0.39 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 2.6165865 C2 = -0.011427854 C3 = 0.022534361 C4 = 0.001551289 C5 = -0.00011769852 C6 = 0.000012401891

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.621149
n _s	1.625424
n _r	1.631412
n _C	1.634391
n _C'	1.635238
n _0.6328	1.636034
n _D	1.639638
n _d	1.639799
n _e	1.644178
n _F	1.652898
n _F'	1.654014
n _g	1.663849
n _h	1.673508
n _i	1.691501
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7155
P_C,A'	0.3183
P_d,C	0.2922
P_e,C	0.5288
P_g,d	1.2994
P_g,F	0.5917
P_h,g	0.5219
P_i,g	1.4941
P_C',t	0.7612
P_e,C'	0.4830
P_F',e	0.5314
P_i,F'	2.0255

transmittance: 5 mm
τ_1.55	0.997
τ_1.5	0.998
τ_1.4	0.997
τ_1.3	0.999
τ_1.2	0.999
τ_1.1	0.999
τ_1.06	0.999
τ_1.05	0.999
τ₁	0.999
τ_0.95	0.999
τ_0.9	0.999
τ_0.85	0.999
τ_0.83	0.999
τ_0.8	0.999
τ_0.78	0.999
τ_0.75	0.999
τ_0.7	0.999
τ_0.65	0.998
τ_0.6	0.998
τ_0.55	0.998
τ_0.5	0.996
τ_0.48	0.996
τ_0.46	0.994
τ_0.44	0.992
τ_0.42	0.987
τ_0.4	0.967
τ_0.39	0.939
τ_0.38	0.86
τ_0.37	0.64
τ_0.36	0.3
τ_0.35	0.03

transmittance: 10 mm
τ_1.55	0.994
τ_1.5	0.995
τ_1.4	0.995
τ_1.3	0.999
τ_1.2	0.999
τ_1.1	0.999
τ_1.06	0.998
τ_1.05	0.998
τ₁	0.998
τ_0.95	0.998
τ_0.9	0.998
τ_0.85	0.998
τ_0.83	0.998
τ_0.8	0.998
τ_0.78	0.998
τ_0.75	0.998
τ_0.7	0.998
τ_0.65	0.997
τ_0.6	0.997
τ_0.55	0.997
τ_0.5	0.993
τ_0.48	0.992
τ_0.46	0.989
τ_0.44	0.984
τ_0.42	0.974
τ_0.4	0.935
τ_0.39	0.882
τ_0.38	0.73
τ_0.37	0.41
τ_0.36	0.09

Poisson coef.: 0.245
Rigidity: 318 Pa*10⁸
Young module: 791 Pa*10⁸
Knoop hardness: 540
Abrasion: 150

Staining: 1
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	87
100 ~ 300	107

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.9
-20 ~ 0		-0.4
0 ~ 20		-0.1
20 ~ 40		0.2
40 ~ 60		0.4
60 ~ 80		0.6

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.3
-20 ~ 0		1.4
0 ~ 20		1.6
20 ~ 40		1.6
40 ~ 60		1.7
60 ~ 80		1.7