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Location: Main > Optical Filters > Neutral Density Filters
 
Absorptive ND GlassFilters
P/N:NDF- Series
Introduction:Key Features
5 Sizes Available: Dia12.5,Dia20mm,Dia25mm,Dia50mm,50x50mm.
Optical Densities Ranging from 0.04 to 5.0
Ideal for Low-Power Applications
Absorptive Glass Reduces Multiple Reflections
Edge Blackening Available Upon Request
Our absorptive neutral density (ND) filters are available with optical densities (OD) ranging from 0.04 to 5.0. Unlike their reflective, metallic counterparts, each filter is fabricated from a Schott glass substrate that has been selected for its spectrally flat absorption coefficient in the visible region of 400 - 650 nm. By varying the type and thickness of the glass used, we are able to produce the entire line of absorptive ND filters. Because of variations between different lots of glass, Photonik recommends that the user calibrate the filter in their setup before taking quantitative measurements.
P/N Keywords Unit Price Available Generate Quotation
NDF-S50.0-A0.5-U 50.0x50.0mm,OD0.5,Absorptive,400-650nm,Uncoated S$100.00/pc In stock Add to Request List
NDF-S50.0-A2.0-U 50.0x50.0mm,OD2.0,Absorptive,400-650nm,Uncoated S$100.00/pc In stock Add to Request List
NDF-S50.0-A3.0-U 50.0x50.0mm,OD3.0,Absorptive,400-650nm,Uncoated S$100.00/pc In stock Add to Request List
NDF-S50.0-A4.0-U 50.0x50.0mm,OD4.0,Absorptive,400-650nm,Uncoated S$100.00/pc In stock Add to Request List
NDF-S50.0-A5.0-U 50.0x50.0mm,OD5.0,Absorptive,400-650nm,Uncoated S$100.00/pc In stock Add to Request List
 
 
Circular Continuously Variable Metallic ND Filters
P/N:CVNDF Series
Introduction:These circular, continuously variable neutral density filters provide adjustable attenuation via rotation. The optical density (OD) increases linearly from the start of the coating. The filters are coated through a full 270?? arc.
Features:
Optical Density Range: 0.04 - 2.0 or 0.04 - 3.0
Ø25mm,Ø27mm,Ø30mm,Ø40mm,Ø50mm,Ø75mm,and Ø100 mm in diameter
Back-Side Coating: usually uncoated, or upon request for AR coating over certain band.
P/N Keywords Unit Price Available Generate Quotation
CVNDF-UVFS-3.0-R0270-0200MR Dia27.0xT2.0mm,UVFS,OD0-3(0-270deg),c/w mount S$360.00/pc In stock Add to Request List
CVNDF-UVFS-3.0-R0500-0200MR Dia50.0xT2.0mm,UVFS,OD0~3(0-270deg),c/w mount S$390.00/pc In stock Add to Request List
 
Name: DIA25.4mm Absorptive Neutral Density Filter Kit
P/N: NDF-AK-R10
Keywords:Dia 25.4mm,OD from 0.04 to 5.0,14pcs/kit
Unit Price: S$580.00/set
Store: In stock
Request: Add to Request List
Introduction:Diameter 25.4mm ND Filters, T from 0.001% to 92%, Total 14 types
Un-mounted 25mm filter plate compatible to any other 1-inch optics mount
Ring mountable to 6-position ND filter wheel
Ring mounted to 1-inch filter mount
Multiple one-by-one mounted filters in series for high OD wanted
e.g. OD0.5 + OD2.0 = OD 2.5
View Detailed Information
Name: 50x50mm Absorptive Neutral Density Filter Kit
P/N: NDF-AK-S20
Keywords:50.0x50.0mm,OD from 0.04 to 5.0,14pcs/kit
Unit Price: S$650.00/set
Store: In stock
Request: Add to Request List
Introduction:50.0x50.0mm Absorptive ND Filters, T from 0.001% to 92%, Total 14 types

In photography and optics, a neutral density filter or ND filter is a "grey" filter. An ideal neutral density filter reduces light of all wavelengths or colors equally. The purpose of standard photographic neutral density filters is to allow the photographer greater flexibility to change the aperture or exposure time, allowing for more control, particularly in extreme circumstances.
View Detailed Information
 
Linearly Reflective Variable ND Filters/Slides
P/N:LVNDF- Series
Introduction:Linearly variable neutral density filter is used to attenuate power density linearly in one direction. The light sources can be white light as well as with laser beam. The substrates used can be standard optical glass BK7 (380-2000nm) or UV fused silica (200-2500nm).
P/N Keywords Unit Price Available Generate Quotation
LVNDF-BK7-2.0-07620254-0160 76.2x25.4xT1.6mm,BK7,OD2.0 max,380-2000nm S$280.00/pc In stock Add to Request List
LVNDF-BK7-3.0-07620254-0100 76.2x25.4xT1.0mm,BK7,OD3.0 max,380-2000nm S$300.00/pc In stock Add to Request List
LVNDF-BK7-3.0-07620254-0160 76.2x25.4xT1.6mm,BK7,OD3.0 max,380-2000nm S$300.00/pc In stock Add to Request List
LVNDF-UVFS-2.0-07620254-0160 76.2x25.4xT1.6mm,UVFS,OD2.0 max,200-2500nm S$320.00/pc In stock Add to Request List
LVNDF-UVFS-3.0-07620254-0160 76.2x25.4xT1.6mm,UVFS,OD3.0 max,200-2500nm S$350.00/pc In stock Add to Request List
 
 
Radially Variable ND Filters(OD 0@Center)
P/N:RVNDF-B Series
Introduction:Radially variable neutral density filters designed to attenuate light in terms of Gaussian distribution, can be used with white light as well as with laser beams.Substrates used have BK7 glass(350-2000nm) and UV fused silica(200-2500nm).
P/N Keywords Unit Price Available Generate Quotation
RVNDF-B-1.0-UVFS-R0250-0160 Dia25.0xT1.6mm,UVFS,OD1.0,OD:0.04@center S$595.00/pc In stock Add to Request List
 
 
Metallized Reflective ND Filter(Broadband)
P/N:NDF-BB Series
Introduction:Metallized Reflective ND Filter is made of UV fused silica substrates, with very thin aluminum coating + protection layer, or Nickel coating deposited on single surface. The filter allows broadband light 200-2500nm designed to pass as specified transmission ratio, others will be reflected. Typical transmission ratios are T50:R50 and T70:R30 for protected-aluminum reflection ND filter, and T25%(OD0.6),T10%(OD1),T1%(OD2) and T0.1%(OD3) for nickel-coated reflective ND filter.

The UV fused silica substrate used in these filters exhibits high transmission and virtually no laser-induced fluorescence, as measured at 193 nm, making it an ideal choice for applications from the UV to the near IR. While the spectral range's lower limit of 200 nm is limited by the absorption of the light by the substrate, UV fused silica provides good transmission up to 2.1 µm, and thus the upper limit of 1200 nm is dependent on the increased opacity of the nickel coating.
P/N Keywords Unit Price Available Generate Quotation
NDF-BBR-OD3.0-R0200-0200 Dia20.0xT2.0mm,UVFS,OD3.0@200-2000nm,Reflective S$60.00/pc In stock Add to Request List
NDF-BBR-OD3.0-R0254-0200 Dia25.4xT2.0mm,UVFS,OD3.0@ 200-2000nm,Reflective S$72.00/pc In stock Add to Request List
NDF-BB-T50-R-025010 Dia25.4xT1.0mm,UVFS,T50% @ 200-2000nm S$250.00/pc In stock Add to Request List
NDF-BB-T50-R-050010 Dia50.0xT1.0mm,UVFS,T50% @ 200-2000nm S$450.00/pc In stock Add to Request List
NDF-BB-T70-R-025010 Dia25.4xT1.0mm,UVFS,T70% @ 200-2000nm S$250.00/pc In stock Add to Request List
NDF-BB-T70-R-050010 Dia50.0xT1.0mm,UVFS,T70% @ 200-2000nm S$450.00/pc In stock Add to Request List
NDF-BB-T0.1-S-01200100-0230 12.0x10.0xT2.3mm,UVFS,T0.1%(OD3.0) @ 200-2500nm S$55.00/pc In stock Add to Request List
NDF-BB-T1-S-01200100-0230 12.0x10.0xT2.3mm,UVFS,T1%(OD2.0) @ 200-2500nm S$55.00/pc In stock Add to Request List
NDF-BB-T10-S-01200100-0230 12.0x10.0xT2.3mm,UVFS,T10%(OD1.0) @ 200-2500nm S$55.00/pc In stock Add to Request List
NDF-BB-T25-S-01200100-0230 12.0x10.0xT2.3mm,UVFS,T25%(OD0.6) @ 200-2500nm S$55.00/pc In stock Add to Request List
NDF-BB-T94-S-01200100-0230 12.0x10.0xT2.3mm,UVFS,T94%(OD0.03) @ 200-2500nm S$40.00/pc In stock Add to Request List
NDF-BBR-OD3.0-S0800-0200 80.0x80.0xT2.0mm,UVFS,OD3.0@200-2000nm,Reflective S$460.00/pc In stock Add to Request List
 
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