Name: 0.4 OD, 25mm Dia., NIR II Coated, Absorptive ND Filter
Brand: Hoya
SKU: 13-239
Price: NT$2,555

Diameter (mm):

25.00

Optical Density OD (Average):

0.4 ±0.05 @ 400-700nm (Uncoated Filter)

Nominal Optical Density @ Center of Coating:

0.55 @ 1200nm

Glass/Filter Number:

ND Filter Glass

Coating:

NIR II (750-1550nm)

Index of Refraction n_d:

1.50

Surface Quality:

80-50

Transformation Temperature (°C):

525

Thickness (mm):

2.50

Thickness Tolerance (mm):

±0.5

Transmission (%):

40.0 (average) @ 400 - 700nm

Type:

Neutral Density Filter

Blocking Wavelength Range (nm):

400 - 700

Dimensional Tolerance (mm):

±0.1

Parallelism (mm):

<0.02

Coating Specification:

R_abs ≤1.5% @ 750 - 800nm
R_abs ≤1.0% @ 800 - 1550nm
R_avg ≤0.7% @ 750 - 1550nm

Wavelength Range (nm):

750 - 1550

Stock No. of Uncoated Filter:

#46-213

0.4 OD, 25mm Dia., NIR II Coated, Absorptive ND Filter

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