Custom obstruction targets, optical aperture, micro slits, mask template, micro stencil, shims and brackets

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Precision Micro-Fabricated Targets and Apertures for Optical & Scientific Applications

Obstruction targets, optical apertures, and micro slits are precision-engineered components used in optical measurement systems, imaging instruments, beam shaping devices, and scientific experiments requiring highly controlled light or particle paths. These parts serve as spatial filters, alignment standards, calibration references, and beam obstruction elements in advanced optical, laser, and diagnostic systems.

The performance of high-precision optical instruments critically depends on the geometric accuracy, edge quality, and surface finish of these components. Slight deviations in aperture size or slit edge quality can affect beam uniformity, focus accuracy, and measurement repeatability — making precision fabrication essential.

With cutting-edge process of micromachining, we provide customers not only standard optical slits, but also good at customized making complicated patterns, metal mask, metal reticles and targets for optical applications, beside the single slit or pinhole, we could make any shape and pattern in thin material or coatings(eg Chrome coating), such as triangle, square,hexagon, ellipse, cross and pattern matrix as required distribution. The min size or width could be from nano to micron range, and customized coating is available also

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Obstruction Targets

Obstruction or shadow targets are calibrated patterns used to:

  • Block or partially occlude light/particle beams

  • Create controlled diffraction patterns

  • Test imaging resolution and contrast

  • Calibrate optical measurement devices

They are commonly employed in laser alignment systems, high-speed cameras, spectrometers, and beam profiling systems.

Obstruction targets often take shapes such as:

  • Circular disks

  • Rectangular blocks

  • Crosshair or grid patterns

  • Custom obstruction shapes

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Slits

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steel-stencil-cutting

High Power Pinhole
High Power Pinhole

Optical Apertures

Optical apertures are accurately sized openings that control the amount and path of light entering an optical system. They can be circular, square, or complex custom geometries and are widely used in:

  • Camera objectives

  • Microscopes

  • Telescopes

  • Spectroscopic instruments

  • Photonics test benches

The key performance factors of optical apertures include:

  • Dimensional accuracy

  • Edge sharpness

  • Minimal surface defects

  • Material stability over temperature

10um-20um-slits-with-microscope 10um/20um slits edge quality

customized-patterns Custom pattern making, any shape above 10um could be customized

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Mounted optical slits.    Click here for more standard slits buying

Micro Slits

Micro slits are narrow openings with highly controlled widths and straightness, essential for:

  • Beam shaping and collimation

  • Diffraction experiments

  • High-resolution optical testing

  • Laser beam profiling

Micro slits are typically fabricated with widths ranging from a few micrometers to several hundred micrometers, with parallelism and edge quality being critical for performance.

Customized Pinhole Array
Customized Pinhole Array

Walthy’s Capabilities

At Walthy Precision, we specialize in high-accuracy micro-fabrication of obstruction targets, optical apertures, and micro slits using advanced manufacturing technologies. Our capabilities include:

Laser Micro-Machining

  • High-precision cutting of micro slits and apertures

  • Minimal heat-affected zone (HAZ)

  • Burr-free and repeatable geometry

Precision CNC Micromachining

  • Complex shapes and custom patterns

  • High positional accuracy

  • Tight tolerance control

Etching & Lithography-Assisted Fabrication

  • Sub-micron feature sizing

  • Precise edge definition

  • Excellent surface quality

Material & Batch Versatility

  • Prototype to full production runs

  • Sheet and wafer-based fabrication

  • Variety of metals, alloys, and optical substrates

For sub-micron scale slits or custom patterns, please click here for solutions

Typical Applications

Precision obstruction targets, apertures and micro slits are used across many cutting-edge technical fields:

Optical & Photonics Instruments

  • Beam collimators and profilers

  • Spectrometers

  • Imaging test chambers

  • Optical benches

Scientific Research & Metrology

  • Diffraction studies

  • Light scattering experiments

  • Calibration artifacts

  • Sensor alignment tools

Laser Systems

  • Beam shaping apertures

  • Slits for laser profile control

  • Optical path obstruction elements

Aerospace, Defense & Medical

  • Precision measurement systems

  • Optical alignment components

  • Micro-optical devices

Custom Solutions

We offer fully customized design and manufacturing services:

✔ Consultation on material selection and geometry
✔ Engineering support for optical and mechanical integration
✔ Simulation and prototyping
✔ Scalable production with strict quality control
✔ Inspection and traceability documentation

Whether you require a single prototype or large production volumes, Walthy Precision can deliver high-performance components tailored to your application.