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Color Glass Filter | Neutrual Density Filter | Bandpass Filter | IPL Filter & IPL Crystal
IR Cut filter | Laserline Interference Filter | Birefringent Filter
 
Neutral density (ND) filter
    Neutral density (ND) filters are used to attenuate incident radiation without altering its spectral distribution. The neutral density value of an ND filter is related to the transmittance by:
D=Log(1/T)
Optical Density: D
Transmittance: T
Absorption glass ND Filter
Specifications:
Material: Optical Neutral Density Glass
Flatness: 2l per 25 mm
Surface Quality: 80/50
Parallelism: 3'
Dimension: circle (dia.25.4mm typical) or square
Dimension Tolerance: +/-0.2mm
Optical Density Tolerance : 5%
 
Metallic Coated Neutral Density Filter

    Metallic coated ND filters are glass or quartz substrates with a precision metallic coating (Inconel) that provides uniform attenuation across a wide spectral range.

Specifications:
Material: BK7 glass and Fused Silica
Flatness: 2l per 25 mm
Surface Quality: 80/50
Parallelism: 3'
Dimension Tolerance: +/-0.2mm
Coating: Vacuum-deposited metallic alloy
Optical density Tolerance: +/-
5%
Simphoton provide ND filter mounted or unmounted.

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