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Optical
Filters>Neutral
Density Filter(NDF)
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Application:
Imaging Systems,Measuring Instruments
Substrate:
Glass,0.1mm |
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Neutral
Density Filter(NDF, absorptive type,glass) |
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Neutral
Density Filter(NDF, coating type,plastic) |
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Application:
Imaging Systems,Measuring Instruments
Substrate:
Plastic,0.1mm |
| Part No |
Thickness |
Trans% |
Test Plot |
| NDFP-07 |
0.1mm |
7% |
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| NDFP-12 |
0.1mm |
12% |
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| NDFP-23 |
0.1mm |
23% |
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| NDFP-30 |
0.1mm |
30% |
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| NDFP-50 |
0.1mm |
50% |
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Variable Density Filter(VND) |
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Circular Variable Density Filter(CVND)
Linear Variable Density Filter(LVND) |
Application:
Imaging Systems,Measuring Instruments
Substrate:
Soda-lime glass
Thickness:0.7,1.1,1.9mm
Surface Quality
S/D:20/10,40/20,60/40(typical),80/50
Spectral Data
waverange:400~700nm
Optical Density Tolerance:±5％
Optical Density:OD0-OD4
Default effective aperture:>90％ |
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The main purpose of using neutral density
filters is to reduce the amount of light that can pass
through the lens. As a result, if a shutter speed is kept
the same, after adding a neutral density filter, a larger
aperture must be used to obtain the same exposure.
Similarly, if an aperture is kept the same, after adding a
neutral density filter, a slower shutter speed must be
used to obtain the same exposure. |
| Circular
Variable Neutral Density Filter (CVND) |
| Part No |
Outside Dia (mm) |
Inside Dia (mm) |
Optical Density |
Plot |
| CVND-10 |
23 |
6 |
0.04 to 1.0 |
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| Linear Variable
Neutral Density Filter (LVND) |
| Part No |
Optical Density |
Size(mm) |
Plot |
| LVND-10 |
0.04 to 1.0 |
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Neutral Density Filter reduces the
brightness of an image without changing the color of the
scene. It allows all wavelengths to pass through equally.
OD=Log(1/T) |
| OD |
Trans% |
OD |
Trans% |
| 0.3 |
50% |
1.8 |
1.5625% |
| 0.6 |
25% |
3.0 |
0.1% |
| 0.9 |
12.5% |
4.0 |
0.01% |
| 1.0 |
10% |
5.0 |
0.001% |
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