Continuously Variable Apodizing Filters
• Bull’s Eye Filter Type Decreases in Density
Radially from Center
• Reverse Bull’s Eye Type Increases in Density
Radially from Center
• Ideal for Eliminating Intensity Variations in
Optical Systems
Apodizing filters are used to create an even illumination
profile in an optical system. Bull’s Eye type filters
feature a high optical density in the center which
decreases continuously to an uncoated edge, and
are commonly used to flatten the intensity profile of
Gaussian beams. The Reverse Bull’s Eye type features
a high optical density coating on the filter’s edge
which decreases continuously to an uncoated center.
End Destiny
Bull’s Eye Type Filter
D/2 0 D/2
Position
Variable Density Beamsplitter
0.5 1.5
1.0 2.0 2.5 3.0
Position (Inches)
End Destiny
0.04
Variable Density Beamsplitter
Stepped Density Filter
0.18 0.5 0.9 1.5
2.0
1.0 2.0 2.5 3.0
Position (Inches)
0.0
End Destiny
End Destiny
Optical Density
Optical Density
0.04
0.04
Position (Inches)
Stepped Density Filter
Circular Continuous (Bullseye) Filter
0.0
End Destiny
Optical Density
0.04
0.18 0.9 2.0
-0.75 -0.50 -0.25 0 +0.25 +0.50 +0.75
Position (Inches)
Position (Inches)
Circular Continuous (Bullseye) Filter
-0.75 -0.50 -0.25 0 +0.25 +0.50 +0.75
Position (Inches)
• Continuous Linear Adjustment of Optical
Density
• Use in Pairs to Control Beam Transmission
• Ideal for 400 - 700nm
Continuously Variable Neutral Density Filters are
ideal for precise adjustments of spectrophotometers,
monochromators, and lasers. Optical density varies
linearly across the length of these continuously variable
neutral density filters. These filters can be used
in pairs to control transmission of an optical beam up
to 25.4mm in diameter.
• 11 Discrete Density Steps
• Design Wavelength of 400 - 700nm
• Density Neutrality of ±5%
Density and transmission vary in eleven equal steps
across the surface length. The steps are abrupt changes
and no light escapes between them. Spectrally flat
neutral density coating. Ideal for applications requiring
variable densities and known density values.
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Substrate: B270
Diameter Tolerance (mm): +0,00/-0,20
Thickness (mm): 1,50 ±0,10
Surface Quality: 60-40
Wavelength Range (nm): 400 - 700
Density Linearity (%): ±5 of Optical Density
Optical Density
0.04
Continuously Variable Apodizing Filters
Filter Type Density Range 25 mm Diameter 50 mm Diameter
Stock No. Price Stock No. Price
Bull’s Eye 0,04 - 1,0 #64-385 €284,68 #64-389 €354,15
Bull’s Eye 0,04 - 2,0 #64-386 €320,38 #64-390 €374,42
Reverse Bull’s Eye 0,04 - 1,0 #64-387 €284,68 #64-391 €354,15
Reverse Bull’s Eye 0,04 - 2,0 #64-388 €320,38 #64-392 €374,42
Continuously Variable Neutral Density (ND) Filters
Optical Density
Continuous Variable Density (ND) Filters
Dimensions
(L x W x T)
0,04 - 1,0 OD 0,04 - 2,0 OD 0,04 - 3,0 OD 0,04 - 4,0 OD
Stock No. Price Stock No. Price Stock No. Price Stock No. Price
3,0" x 1,0" x 0,062" #64-381 €93,61 #41-960 €108,08 #64-382 €138,00 #63-048 €157,29
Stepped Neutral Density (ND) Filters
1.0
0.8
0.6
0.4
0.2
Optical Density
0.04
1.0
Stepped Neutral Density (ND) Filters
Dimensions
(L x W x T)
0,04 - 1,0 OD 0,04 - 2,0 OD 0,04 - 3,0 OD
Stock No. Price Stock No. Price Stock No. Price
0.8
0.6
Optical Density
2,0" x 1,0" x 0,062" #32-599 €177,56 #64-383 €195,89 #64-384 €216,16
Kinematic Filter Mounts
• 100 TPI Lockable Fine Adjustment Screws
• Tip/Tilt Range: ±5°
• Three Screw Versions Permit Translation of
Optical Axis
0.4
0.2
0.04
Angular Tip/Tilt Range: ±5°
Linear Resolution: 0,25 mm
Post Compatability: #8 or M4
Filter Mounts
TECHSPEC® Kinematic Filter Mounts Units: mm
Aperture
Size
Minimum
Optic Size
Min.
Thickness
Max.
Thickness
Two Adjustment Screws Three Adjustment Screws
Stock No. Price Stock No. Price
25,0 12,7 x 12,7 0,5 3,7 #58-874 €100,36 #58-875 €109,05
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