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Anti-Reflection (AR) Coated HOYA Neutral Density (ND) Filters
• Optical Densities from 0.1 to 4.0
• VIS 0°, NIR I, and NIR II Coating Options
• 12.5 and 50mm Diameters Available Online
Anti-Reflection (AR) Coated HOYA Absorptive Neutral Density (ND) Filters feature HOYA colored glass substrates
that are AR coated on both surfaces to reduce back reflections in the visible or near-infrared (NIR) spectra.
VIS 0°, NIR I, and NIR II broadband AR coatings cover the spectral ranges of 425 - 675nm, 600 - 1050nm,
and 750-1550nm. These neutral density filters attenuate light via absorption and can be stacked together to
achieve custom optical densities to meet application requirements. Anti-Reflection (AR) Coated HOYA Absorptive
Neutral Density (ND) Filters are ideal for use in imaging and detection applications to reduce stray light, as
well as in general filter stacking applications to control intensity. The standard metric diameters of 12.5, 25, and
50mm are compatible with our TECHSPEC® C, S, and T-Mount Circular Optic Mounts for benchtop applications.
Diameter Tolerane (mm): ±0.1
Thickness Tolerance (mm): ±0.5
Parallelism (mm): <0.02
Surface Quality: 80-50
AR Coating Range (See page 9 for specifications):
VIS 0°: 425 - 675nn
NIR I: 600 - 1050nm
NIR II: 750 - 1555nm
NEW
Visit www.edmundoptics.co.uk/4111 for individual
transmission and optical density curves
Anti-Reflection (AR) Coated HOYA Neutral Density (ND) Filters * Specifications are for the uncoated filter from 400 to 700nm
Average
Average
VIS 0° Coated 25mm Diameter NIR I Coated 25mm Diameter NIR II Coated 25mm Diameter
Optical
Trans.
Hoya
Thickness
Density*
(%)*
Glass
(mm)
Nominal OD
@ 550nm Stock No. Price Nominal OD
@ 900nm Stock No. Price Nominal OD
@ 1200nm Stock No. Price
0.1 ± 0.03 79 Hoya ND-70 1.20 0.08 #13-095 £50.15 0.14 #13-163 £50.15 0.16 #13-235 £50.15
0.15 ± 0.03 70 Hoya ND-70 2.50 0.13 #13-096 £50.15 0.25 #13-164 £50.15 0.29 #13-236 £50.15
0.2 ± 0.04 63 Hoya ND-50 1.50 0.18 #13-097 £50.15 0.26 #13-165 £50.15 0.3 #13-237 £50.15
0.3 ± 0.05 50 Hoya ND-50 2.50 0.28 #13-098 £50.15 0.4 #13-166 £50.15 0.47 #13-238 £50.15
0.4 ± 0.05 40 Hoya ND-40 2.50 0.35 #13-099 £50.15 0.48 #13-167 £50.15 0.55 #13-239 £50.15
0.5 ± 0.05 32 Hoya ND-25 2.00 0.08 #13-100 £50.15 0.14 #13-168 £50.15 0.79 #13-240 £50.15
0.6 ± 0.05 25 Hoya ND-25 2.50 0.13 #13-101 £50.15 0.25 #13-169 £50.15 0.98 #13-241 £50.15
0.7 ± 0.05 20 Hoya ND-25 3.10 0.43 #13-102 £50.15 0.68 #13-170 £50.15 1.21 #13-242 £50.15
0.9 ± 0.1 12.5 Hoya ND-13 2.50 0.53 #13-103 £50.15 0.84 #13-171 £50.15 1.18 #13-243 £50.15
1.0 ± 0.1 10 Hoya ND-0.3 1.00 0.65 #13-104 £50.15 1.03 #13-172 £50.15 0.53 #13-244 £50.15
1.3 ± 0.1 5 Hoya ND-0.3 1.45 0.86 #13-105 £50.15 1.02 #13-173 £50.15 0.75 #13-245 £50.15
1.5 ± 0.1 3 Hoya ND-0.3 1.50 0.94 #13-106 £50.15 0.53 #13-174 £50.15 0.78 #13-246 £50.15
2.0 ± 0.3 1 Hoya ND-0.3 2.00 1.85 #13-107 £50.15 1.03 #13-175 £50.15 1.02 #13-247 £50.15
2.5 ± 0.1 0.3 Hoya ND-0.3 2.50 2.3 #13-108 £50.15 1.28 #13-176 £50.15 1.27 #13-248 £50.15
3.0 ± 0.3 0.1 Hoya ND-0.3 3.00 2.77 #13-109 £50.15 1.53 #13-177 £50.15 1.52 #13-249 £50.15
3.5 ± 0.2 0.03 Hoya ND-006 2.50 3.40 #13-110 £50.15 2.51 #13-178 £50.15 2.77 #13-250 £50.15
4.0 ± 0.2 0.01 Hoya ND-006 2.85 3.60 #13-111 £50.15 2.58 #13-179 £50.15 2.88 #13-251 £50.15
HOYA Absorptive Neutral Density (ND) Filters
These filters possess level spectral transmittance characteristics in the visible region and attenuate light by
absorption with minimal reflection. Since our Hoya neutral density filters are held to a specific thickness, the
optical density is a function of the glass type. They are useful in light control applications for measuring instruments
and exposure control in imaging. Spectral variations occur as optical density increases. Visit our website
for transmission curves for all of our HOYA Absorptive Neutral Density (ND) Filters.
Dimensional Tolerance (mm):
12.5, 25 and 50mm Dia. ±0.1
50mm Square ±0.2
Thickness Tolerance (mm): ±0.5
Wavelength Range (nm): 400
700
100
90
80
70
60
50
40
30
Transmission (%)
Parallelism (mm): <0.02
20
Surface Quality:
80-50
10
Tg: Transformation Temperature 0
Absorptive ND Filters
400 500 550 600 650 700 750
Wavelength (nm)
OD 0.1
OD 0.15
OD 0.2
OD 0.3
OD 0.4
OD 0.5
OD 0.6
OD 0.7
OD 0.9
OD 1.0
OD 1.3
OD 1.5
OD 2.0
OD 2.5
OD 3.0
HOYA Absorptive Neutral Density (ND) Filters
Optical
Thickness
Average
Hoya
Tg
Density
(mm)
Trans. (%)
Glass
(°C)
Refractive
Index (nd)
HOYA Absorptive Neutral Density
(ND) Filter Kits
25mm Diameter, 6 Filter Set.
OD: 0.15, 0.3, 0.4, 0.6, 0.9, 2.5. #55-222 £185.00
Empty 1" Dia. Filter Case: Designed
to hold eight 1" filters up to 5mm thick.
#55-224 £55.00
Wooden storage box with foam lining.
12.5mm Diameter 25mm Diameter 50mm Diameter 50 x 50mm
Stock No. Price Stock No. Price Stock No. Price Stock No. Price
0.1 ± 0.03 1.20 79 ND-70 470 1.500 #63-456 £23.38 #63-460 £33.15 #65-808 £71.40 #63-464 £71.40
0.15 ± 0.03 2.50 70 ND-70 470 1.500 #48-523 £23.38 #46-211 £33.15 #65-809 £71.40 #46-217 £71.40
0.2 ± 0.04 1.60 63 ND-50 495 1.504 #63-457 £23.38 #63-461 £33.15 #65-810 £71.40 #63-465 £71.40
0.3 ± 0.05 2.50 50 ND-50 495 1.504 #48-524 £23.38 #46-212 £33.15 #65-811 £71.40 #46-218 £71.40
0.4 ± 0.05 2.50 40 ND-40 525 1.504 #48-525 £23.38 #46-213 £33.15 #65-812 £71.40 #46-219 £71.40
0.5 ± 0.05 2.00 32 ND-25 535 1.507 #48-526 £23.38 #48-089 £33.15 #65-813 £71.40 #48-094 £71.40
0.6 ± 0.05 2.50 25 ND-25 535 1.507 #48-527 £23.38 #46-214 £33.15 #65-814 £71.40 #46-220 £71.40
0.7 ± 0.05 3.10 20 ND-25 535 1.507 #63-458 £23.38 #63-462 £33.15 #65-815 £71.40 #63-466 £71.40
0.9 ± 0.1 2.50 12.5 ND-13 535 1.510 #48-528 £23.38 #46-215 £33.15 #65-816 £71.40 #46-221 £71.40
1.0 ± 0.1 1.00 10 ND-0.3 490 1.514 #48-529 £23.38 #48-090 £33.15 #65-817 £71.40 #48-095 £71.40
1.3 ± 0.1 1.45 5 ND-0.3 490 1.514 #63-459 £23.38 #63-463 £33.15 #65-818 £71.40 #63-467 £71.40
1.5 ± 0.1 1.50 3 ND-0.3 490 1.514 #48-530 £23.38 #48-091 £33.15 #65-819 £71.40 #48-096 £71.40
2.0 ± 0.3 2.00 1 ND-0.3 490 1.514 #48-531 £23.38 #48-092 £33.15 #65-820 £71.40 #48-097 £71.40
2.5 ± 0.1 2.50 0.3 ND-0.3 490 1.514 #48-532 £23.38 #46-216 £33.15 #65-821 £71.40 #46-222 £71.40
3.0 ± 0.3 3.00 0.1 ND-0.3 490 1.514 #48-533 £23.38 #48-093 £33.15 #65-822 £71.40 #48-098 £71.40
3.5 ± 0.2 2.50 0.03 ND-006 542 1.531 #36-268 £23.38 #36-269 £33.15 #36-270 £71.40 #36-271 £71.40
4.0 ± 0.2 2.85 0.01 ND-006 542 1.531 #36-272 £23.38 #36-273 £33.15 #36-276 £71.40 #36-277 £71.40
Kit – Includes all Optical Densities except OD 3.0 #63-468 £259.25 #63-469 £344.25 #66-155 £820.25 #63-470 £820.25
Visit www.edmundoptics.co.uk/3993 for C-Mount Absorptive Neutral Density (ND Filters)
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