Square Precision Pinholes


  • Precision Pinholes in Stainless Steel, Black Oxide Coated Foils
  • Mounted in Ø1" Disks
  • Pinhole Sizes from 100 μm to 1 mm Square

S100QK

S200QK

S1000QK

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Features

  • Square Pinhole Sizes from 100 µm to 1 mm
  • Black-Oxide-Coated Stainless Steel Foils
  • Radius of Curvature of the Corners: ≤5 µm
  • Mounted in Ø1" Black-Anodized-Aluminum Housings

Single, mounted, precision square pinholes offer small optical apertures for applications with a small field of view, such as direct imaging of samples or creating a digital hologram. Square pinholes allow for increased sensitivity due to more efficient tiling compared to circular pinholes. The pinholes offered here use black-oxide-coated stainless steel foil, are available in sizes from 100 µm to 1 mm, and are mounted in Ø1" black-anodized-aluminum housings.

Precision Pinhole and Slit Options
Thorlabs' precision pinholes and optical slits are available with an assortment of fabrication materials and coatings. The choice of a particular size and material should depend on the application. Low-power applications may benefit more from the absorbance of blackened stainless steel foils, while high-power applications may need the high damage threshold and reflectivity of gold-plated copper foils or the high melting point and lower reflectivity of our tungsten foils. Please see the Material Properties tab for more information. Our stocked pinhole and slit offerings are summarized in the table to the right.

In addition to single pinholes, Thorlabs also offers pinhole wheels that contain 16 radially-spaced pinholes that are lithographically etched onto a chrome-plated fused silica substrate. These wheels allow the user to test multiple pinhole sizes within a setup.

If you do not see what you need among our stock pinhole and slit offerings, it is possible to special order pinholes and slits that are made with different foil materials, have different hole sizes and shapes, incorporate multiple holes in one foil, or provide different hole configurations. Customized pinhole housings are also available. Please contact Tech Support to discuss your specific needs.

Item # Pinhole
Size
Pinhole Dimensional
Tolerance
Radius of Curvature
of Pinhole Corners
Foil
Thickness
Pinhole
Material
Housing
Material
Housing
Size
S100QKa 100 µm x 100 µm ±4 µm ≤5 µm 50 µm 300 Series Stainless Steel 6061-T6 Aluminum Ø1"
S200QKa 200 µm x 200 µm ±6 µm
S500QKa 500 µm x 500 µm ±10 µm
S1000QKa 1000 µm x 1000 µm
  • Upon request, this item is available with an item-specific test report at an additional cost. Please contact Tech Support for details.

Precision Pinholes and Slits
Thorlabs offers precision pinholes with blackened stainless steel, tungsten, or gold-plated copper foils. Our pinholes with stainless steel foils are blackened on both sides for increased absorbance and are available from stock in circles from Ø1 µm to Ø1 mm and squares from 100 µm x 100 µm to 1 mm x 1 mm. Our pinholes with tungsten foils are uncoated and available with pinhole diameters from 5 µm to 2 mm. Lastly, our pinholes with gold-plated copper foils, plated with gold on one side and black-oxide coated on the reverse, are offered in 10 µm, 25 µm, or 50 µm diameters. We also offer slits in blackened stainless steel foils from stock with slit widths from 5 to 200 µm.

If you do not see what you need among our stock pinhole and slit offerings, it is also possible to special order pinholes and slits that are made with different foil materials, have different hole sizes and shapes, incorporate multiple holes in one foil, or provide different hole configurations. Please contact Tech Support to discuss your specific needs. For more information on the properties of the bulk materials from which the pinholes are fabricated, see the table below.

Material Properties
Depending on the application, it can be important to consider the material properties of the pinhole or slit. The material used to construct the aperture can have varying levels of melting point, density, and thermal conductivity, as detailed in the table below. Pinholes fabricated using a given material can be viewed by clicking on the material name.

Material Properties
Material 300 Series Stainless Steela Tungsten Copperb
Melting Point 1390 - 1450 °C 3422 °C 1085 °C
Density 8.03 g/cm3 19.25 g/cm3 8.96 g/cm3
Brinell Hardness 170 MPa 2570 MPa 878 MPa
Thermal Expansion Coefficient 16.2 (µm/m)/°C 4.5 (µm/m)/°C 16.7 (µm/m)/°C
Specific Heat @ 20 °C 485 J/(K*kg) 134 J/(K*kg) 385 J/(K*kg)
Thermal Conductivity 16.2 W/(m*K) 173 W/(m*K) 401 W/(m*K)
Thermal Diffusivity @ 300 K 3.1 mm2/s 80 mm2/s 111 mm2/s
  • Stainless steel pinholes and slits are blackened on both sides to increase absorbance. The material properties will be predominantly that of bulk stainless steel.
  • Gold-plated copper pinholes have a thin coating of gold on one side of the bulk copper foil. With a beam incident on this side, reflectivity will be that of gold (96% @ 800 nm) while thermal properties will be predominantly copper-based.

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Apertures Selection Guide
Aperture Type Representative Image
(Click to Enlarge)
Description Aperture Sizes Available from Stocka
Single Precision Pinholesa
Circular Pinholes in Stainless Steel Foils Ø1 µm to Ø1 mm
Circular Pinholes in Tungsten Foils Ø5 µm to Ø2 mm
Circular Pinholes in Gold-Plated Copper Foils Ø10 to Ø50 µm
Square Pinholes in Stainless Steel Foils 100 µm to 1000 mm Square
Slitsa 3 mm Long Slits in Stainless Steel Foils Slit Widths: 5 to 200 µm
Annular Apertures Annular Aperture Obstruction Targets on
Quartz Substrates with Chrome Masks
Ø300 µm or Ø2 mm Pinholes with ε Ratiosb of 0.85, 
Ø1 mm Pinholes with ε Ratiosb of 0.05 0.1, or 0.85
Pinhole Wheels Manual, Mounted or Unmounted, Chrome-Plated Fused Silica Disks
with Lithographically Etched Pinholes
Each Disk has 16 Pinholes from Ø25 µm to Ø2 mm and
Four Annular Apertures (Ø100 µm Hole, 50 µm Obstruction)
Motorized Pinhole Wheels with Chrome-Plated Glass Disks
with Lithographically Etched Pinholes
Each Disk has 16 Pinholes from Ø25 µm to Ø2 mm and
Four Annular Apertures (Ø100 µm Hole, 50 µm Obstruction)
  • Single precision pinholes and slits can be special ordered with different aperture sizes, foil materials, shapes, and hole distributions than those offered from stock. Please contact Tech Support with inquiries.
  • Ratio of the Obstruction Diameter to the Pinhole Diameter

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
S100QK Support Documentation
S100QKNEW!Ø1" Mounted Pinhole, 100 ± 4 µm Square, Stainless Steel
$101.58
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S200QK Support Documentation
S200QKNEW!Ø1" Mounted Pinhole, 200 ± 6 µm Square, Stainless Steel
$101.58
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S500QK Support Documentation
S500QKNEW!Ø1" Mounted Pinhole, 500 ± 10 µm Square, Stainless Steel
$101.58
Today
S1000QK Support Documentation
S1000QKNEW!Ø1" Mounted Pinhole, 1000 ± 10 µm Square, Stainless Steel
$101.58
Today