Stamped metal frames: locate repeated features against a dark field

A diffuse ring light makes the stamped metal bright while the openings remain dark. The real capture shows a useful starting image for locating tabs, holes and repeated frame features.

Locate the part from features that survive normal manufacturing variation.

3D illustration of the inspection setup: Stamped metal features under diffuse ring lightSource white-light capture: stamped faces are bright and openings dark.Real camera capture
3D illustration of the arrangement
  • Proposed light housing (spec)Ø90 × 28 mm
  • EvidenceReal lighting-lab captures
  • Camera (proposed)2448 × 2048 monochrome
  • Field (derived proposal)33.78 × 28.26 mm

Explore it in 3D

Stamped metal features under diffuse ring light

Camera and available lens CAD are published models. Lens and light envelopes use printed dimensions. The linked station uses its published base size and column height; carriage, brackets, fittings, parts and spacing are illustrative. Confirm load, travel, fasteners and clearances before ordering. Light paths explain the arrangement and do not simulate optical performance. The part geometry is illustrative and is not reconstructed from the camera image. The proposed field is derived from the printed lens magnification and camera pixel dimensions; actual coverage and focus need a bench check. The illustrated ring position keeps the drawn viewing envelope inside its central aperture; verify vignetting and illumination on the actual sample. Representative part geometry is illustrative, not reconstructed inspection evidence.

The challenge

Thin stamped parts have shiny flat faces, formed tabs and punched openings. A locating algorithm needs the same features to remain visible across finish and pose changes.

How it was solved

The source identifies white LS-SDL-0030. Its 90 mm outer diameter, 28 mm viewing opening and 28 mm height are catalog dimensions.

The proposed scene uses a section of stamped strip. Reels, feeds and production handling are outside the optical kit.

Why it works

  1. 1

    Diffuse surrounding illumination reduces harsh directional shadows while preserving the difference between metal and open space.

  2. 2

    The source describes location contrast. It gives no dimensional result or evidence that hidden cracks, burrs or formed height are detected.

Lighting application-lab image sheet

Evidence you can inspect

Visible in the images

Repeated openings, edges and formed tabs are visible in the captured strip section.

What the source reports

The sheet reports high-contrast location imaging, without calibrated position error or repeatability data.

How to use this evidence

A lighting application-lab demonstration. The source supplies no customer deployment, defect-size limit, repeatability study or production false-call data. Proposed camera, lens, field, mounting and spacing are not the original tested system.

From image contrast to a production decision

What to validate on your part

  1. 01

    Select stable datums

    Choose punched features that remain visible across normal strip handling and forming variation.

  2. 02

    Test real material lots

    Include lubrication, tool wear, acceptable burrs and coating changes.

  3. 03

    Repeat loading and location

    Measure image-coordinate stability and calibrated error across fixture reloads and part orientations.

From the demo to your test bench

Parts in this setup

Build this system

"Tested" identifies the part named in the source. "Our pick" is a proposed alternative or supporting part. Confirm colour, optics, controllers, power supplies, cables and mounting before ordering.

The set-up

Lighting evidenceApplication-lab source captures
Camera and lensProposed catalog components; source camera unspecified
Proposed field (derived)33.78 × 28.26 mm at 0.25x
Lens working distance (spec)150 mm at the listed magnification
Mounting (proposed)LS-MNT-0097 · 600 mm station, glass tray and two lighting holders

Mount the optics with intent

The station is an optical test bench, with its two lighting holders included in the catalog listing. The 3D column and base follow the published height and footprint. Carriages, clamps and part supports are schematic: confirm camera screw pattern, lens support, light fasteners, permissible load and actual travel before ordering.

Complete the electrical system

Select a controller against the exact light voltage, drive mode and power, then confirm camera data/power/I/O cables and a suitable PC. These are not silently added to the proposed optical kit.

Build this system

Start from this setup, adapt it to your part.

The configurator opens with this study's camera, lens, light and station picked. Swap any part, check fit and price, then buy or ask for a quote.

Camera and available lens CAD are published models. Lens and light envelopes use printed dimensions. The linked station uses its published base size and column height; carriage, brackets, fittings, parts and spacing are illustrative. Confirm load, travel, fasteners and clearances before ordering. Light paths explain the arrangement and do not simulate optical performance. The part geometry is illustrative and is not reconstructed from the camera image. The proposed field is derived from the printed lens magnification and camera pixel dimensions; actual coverage and focus need a bench check. The illustrated ring position keeps the drawn viewing envelope inside its central aperture; verify vignetting and illumination on the actual sample. Representative part geometry is illustrative, not reconstructed inspection evidence.