Absorptive Neutral Density (ND) Filter Φ25mm OD=0.2
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Product No. 248582
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- Dia Φ25mm
- OD 0.2
- Design Wavelength -
- Material Neutral grey glass
- Transmitted Wavefront error λ/4 @ 633 nm
- Parallelism ＜1arcmin
- Surface Quality 60-40
- Diameter Tolerance +0.0/-0.2mm
- Thickness 1.52±0.5mm
- Applied Wavelength Range 400~700nm
- T 63%
- Optical Density Tolerance ±5% @633nm
- CA ＞90%
- Optical Density(OD) OD= -log(T/100)
Different from reflective filters, absorptive neutral density filters use various neutral density optical glasses to offer a range of densities by controlling materials and thickness .These filters have low surface reflection and flat spectral response in the visible range. They can be widely used in spectral measurement, imaging optical systems, machine vision systems and optical output attenuation of low power lasers
