FILTER PRODUCTS

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FILTER PRODUCTS

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Pinholes

Walthy Precision Co., Ltd. offers high-quality custom pinholes and pinhole arrays tailored to your specific requirements. With pinhole diameters ranging from 1 µm to 1000 µm, we cater to both small quantity customizations and large-scale mass production, all at competitive prices. Our precision-crafted pinholes and ...

Specifications

Pinhole Diameter: 5 um
Mounting: Mounted, Unmounted
Part Diameter: 9.5 mm
Outer Shape: Can be Round, square, rectangular etc.
Finish: Can be blacked or not
Walthy Precision Co., Ltd. offers high-quality unmounted optical pinholes ideal for optical systems, educational experiments, and spectrophotometer image analysis. Our pinholes are available in diameters ranging from 5 µm to 1000 µm, crafted from durable 304 stainless steel. Each pinhole is precisely fabricated to meet ...

Specifications

Pinhole Diameter: 1 um
Mounting: Unmounted
Part Diameter: 9.5 mm
Material: 304 Stainless Steel Copper, Nickel, Becu etc.
Thickness: 0.05mm or Customized
Walthy Precision Co., Ltd. offers custom high power pinholes specifically designed for optical, laser, astronomy, and other scientific applications. Our pinholes, available in diameters ranging from 1 to 1000 micrometers, are crafted from premium materials such as copper and gold-plated options, ensuring durability and optimal ...

Specifications

Pinhole Diameter: 1 um
Mounting: Unmounted
Part Diameter: 9.5 mm
Typical Material: Copper/Gold Plated Or customized
Finish: Gold Coated
Circular Aperture 0.001mm (1micron) diameter  

Specifications

Pinhole Diameter: 1 um
Mounting: Mounted
Part Diameter: 12.7 mm
Circular Aperture 0.002mm (2micron) diameter.  

Specifications

Pinhole Diameter: 2 um
Mounting: Mounted
Part Diameter: 12.7 mm
Circular Aperture 0.005mm (5micron) diameter.

Specifications

Pinhole Diameter: 5 um
Mounting: Mounted
Part Diameter: 12.7 mm
Circular Aperture 0.01 (10 microns) diameter.

Specifications

Pinhole Diameter: 10 um
Mounting: Mounted
Part Diameter: 12.7 mm
Circular Aperture 0.05mm (50micron) diameter.

Specifications

Pinhole Diameter: 50 um
Mounting: Mounted
Part Diameter: 12.7 mm
Circular Aperture 0.025mm (25micron) diameter.

Specifications

Pinhole Diameter: 25 um
Mounting: Mounted
Part Diameter: 12.7 mm
The Vacuum Spatial Filter & Vacuum Cell designed for Pulsed Lasers and characterized with high peak power Vacuum Spatial Filter (VSF), is a vacuumed borosilicate glass cell at which center lays titanium pinhole. Spatial filter, a usual technique used to improve laser beam quality by removing noise from laser beams and resulting ...

Specifications

Pinhole Diameter: 2000 um
Mounting: Mounted
Part Diameter: 5 mm
Cell Material: Borosilicate or Molybdenum Glass
Pinhole Material: Titan or Stainless steel
The Spatial Filters use standard microscope objectives and 3⁄ 8\" diameter pinhole disks, both available from Data Optics in a variety of sizes (refer to the section following this for information on sizes available). The objective lens is mounted in a sliding tube for coarse focus adjustment. The tube and objective lens can be ...

Specifications

Pinhole Diameter: Not Specified
Mounting: Mounted
Part Diameter: Not Specified

Precision Pinholes: Mastering Beam Shaping and Spatial Filtering

Pinholes are compact, high-precision apertures used in optical systems, laser experiments, and imaging applications to deliver clean, well-defined beams. Unlike adjustable or iris apertures, pinholes are fixed-diameter openings—typically ranging from a few micrometers to several millimeters—machined into metal plates. These unassuming components play a crucial role in enhancing wavelength selection, beam uniformity, and alignment precision.

What Makes Pinholes Essential?

  1. Spatial Filtering: Pinholes remove unwanted diffraction and high-frequency noise from laser beams, producing a smooth, Gaussian profile. This is essential for applications like advanced imaging, spectroscopy, and holography.

  2. Beam Waist Control: In microscopy and laser scanning, pinholes define the focal volume—improving depth resolution and contrast.

  3. Alignment and Calibration: By inserting pinholes in optical paths, engineers can precisely align lasers or optical axes, improving system accuracy.

Pinholes vs. Other Apertures

  • Fixed Precision: While adjustable apertures allow diameter tuning, pinholes provide consistent, reproducible beam waists—critical when you need repeatable optical performance.

  • Material Choices: Typically fabricated from stainless steel, nickel-iron alloys, or Invar, pinholes offer high thermal stability and minimal edge roughness, ensuring crisp beam edges and long-term reliability.

Choosing the Right Pinhole

To select the ideal pinhole for your application, consider:

  • Diameter: Smaller sizes (<10 µm) offer finer spatial filtering, while larger ones (up to several mm) provide greater throughput.

  • Thickness: Thinner plates reduce beam clipping and diffraction effects, suitable for high-power lasers.

  • Mounting Format: Pinholes are available in fixed plate mounts, SM1/SM05 thread cages, or kinematic mounts—optimizing ease of integration into optical setups.

  • Surface Finish: Blackened or anodized surfaces help suppress unwanted reflections and stray light.

FindLight’s Pinholes – Features & Benefits

  • Precision Machining: Micrometer‑accurate holes with smooth edges provide clean, reliable beam shaping.

  • Wide Diameter Range: From sub‑10 µm pinholes for confocal microscopy to mm‑scale apertures for industrial lasers.

  • Mounting Flexibility: Choose from inserts, adapters, and cage‑system mounts compatible with your existing equipment.

  • Trusted Quality: Sourced from top manufacturers, our pinholes meet strict optical tolerances and material specifications.

Applications at a Glance

  • Confocal and fluorescence microscopy

  • Laser beam cleanup and mode stabilization

  • Spectroscopy spatial filtering

  • Optical alignment and system modulation

  • Ultrafast laser research and beam shaping

Discover Pinholes on FindLight

Whether you're refining a laser’s spatial profile or ensuring clean imaging in microscopy, our pinholes deliver precision and performance. Browse our curated collection, compare diameters, compatibility options, and mounting formats, and enhance your optical systems today.

Find the perfect pinhole solution—optimize your beam shaping with photonics-grade quality from FindLight.

Did You know?

Did you know that pinholes are among the simplest yet most powerful tools in optical science? Despite their tiny size, these precision apertures play a critical role in laser beam shaping, spatial filtering, and high-resolution imaging. By allowing only the central, cleanest portion of a light beam to pass through, pinholes eliminate unwanted optical noise, resulting in smoother, more stable beam profiles. Used extensively in confocal microscopy, spectroscopy, and laser alignment, pinholes are machined with micrometer-level accuracy into ultra-thin metal substrates like stainless steel or Invar. Their fixed, circular openings range from just a few microns to several millimeters, enabling tight control over light propagation. In spatial filters, pinholes are often paired with lenses to isolate the fundamental mode of a laser beam - a vital step for high-precision experiments and imaging systems. Whether you’re cleaning up a beam or sharpening your microscope’s resolution, the humble pinhole is a powerhouse of optical refinement.