FF5 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.592702 n_e = 1.596657	V_d = 35.44 V_e = 35.16	n_F - n_C = 0.016721 n_F' - n_C' = 0.016966	Coloring: 0.35 - 0.38 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 2.4743324 C2 = -0.010955338 C3 = 0.019293801 C4 = 0.0014497732 C5 = -0.00011038744 C6 = 0.000011136008

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.575789
n _s	1.579699
n _r	1.585126
n _C	1.587818
n _C'	1.588583
n _0.6328	1.589302
n _D	1.592557
n _d	1.592702
n _e	1.596657
n _F	1.604540
n _F'	1.605549
n _g	1.614450
n _h	1.623201
n _i	1.639517
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7193
P_C,A'	0.3185
P_d,C	0.2920
P_e,C	0.5286
P_g,d	1.3006
P_g,F	0.5926
P_h,g	0.5233
P_i,g	1.4990
P_C',t	0.7651
P_e,C'	0.4828
P_F',e	0.5317
P_i,F'	2.0313

transmittance: 5 mm
τ_0.7	0.999
τ_0.65	0.999
τ_0.6	0.999
τ_0.55	0.999
τ_0.5	0.997
τ_0.48	0.996
τ_0.46	0.994
τ_0.44	0.994
τ_0.42	0.994
τ_0.4	0.988
τ_0.39	0.979
τ_0.38	0.953
τ_0.37	0.87
τ_0.36	0.61
τ_0.35	0.2

transmittance: 10 mm
τ_0.7	0.999
τ_0.65	0.999
τ_0.6	0.999
τ_0.55	0.999
τ_0.5	0.995
τ_0.48	0.992
τ_0.46	0.989
τ_0.44	0.988
τ_0.42	0.988
τ_0.4	0.976
τ_0.39	0.958
τ_0.38	0.909
τ_0.37	0.76
τ_0.36	0.38
τ_0.35	0.04

Knoop hardness: 500
Optical stress coef.: 3.31 1/Pa*10¹²
Abrasion: 180

Staining: 1
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	86
100 ~ 300	94

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-1.8
-20 ~ 0		-1.3
0 ~ 20		-0.9
20 ~ 40		-0.6
40 ~ 60		-0.3

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.4
-20 ~ 0		0.5
0 ~ 20		0.7
20 ~ 40		0.8
40 ~ 60		1
60 ~ 80		1.1