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Inicio / Case studies / LED-panel and substrate appearance
Application study · Electronic component manufacturing

LED panels and substrates: reveal the repeated pattern without implying electrical performance

Two independent source captures show a dense lamp-panel array and a larger substrate pattern. Flat coaxial lighting makes the repeated geometry visible for an appearance trial; the images do not establish whether the devices light or conduct correctly.

Use the pattern for appearance checks and verify device function independently.

  • Light in sourceLS-FCS100 · white
  • EvidenceReal application-lab image
  • Imaging kitCamera, lens and fixture proposed
  • AcceptanceValidate on representative parts
3D view of the inspection set-up: camera, lens, light and partDrag to rotate · scroll to zoom
3D illustration · real CAD where available
Walk through this setup 5 guided stops
From component to inspection

Understand each choice.

Choose a stop to frame the part in 3D and see why it belongs in this setup. The component notes and links remain available if 3D cannot load.

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. Representative part geometry is illustrative, not reconstructed inspection evidence. The specimen and lighting angle are representative, not dimensions or settings recovered from the source capture.

From the demo to your test bench

Build around the parts you can buy.

Explore each component, check its specifications and compare alternatives. The proposed quote includes the linked test station; its catalog listing includes 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.

Configure the mounting station →

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.

Lighting application-lab catalog capture

Evidence you can inspect

Visible in the images

The lamp-panel array and the separate patterned substrate have visible repeated geometry.

What the source reports

The source labels lamp-panel and LED-substrate defect inspection and identifies their respective white flat coaxial lights.

How to use this evidence

Two different source samples, without labelled individual defects, minimum feature size, detection results or device-function data.

What the camera saw

Cropped from the source test sheet; original test annotations are retained. Captures are not generated or enhanced. Drag the comparison slider or use the image buttons.

Source example A under the white LS-FCS100: a dense repeated lamp-panel pattern is visible.
Source example A under the white LS-FCS100: a dense repeated lamp-panel pattern is visible.
Independent source example B under the white LS-FCS200: substrate paths and openings are visible. These are different samples, not a before-and-after pair.
Independent source example B under the white LS-FCS200: substrate paths and openings are visible. These are different samples, not a before-and-after pair.

The challenge

A large repeated array can hide local missing or malformed features in otherwise similar neighbours.

Surface marks and pattern geometry must be distinguished from actual electrical defects.

How it was solved

The catalog identifies a white 100 mm flat coaxial light for the lamp-panel example and a white 200 mm version for the independent substrate example.

Choose a proposed field that resolves the required repeated feature. The illustrated panel is representative and does not recreate either source sample or prove whole-panel coverage.

Why it works

  1. 1

    A broad light-guide arrangement provides a reflected view of repeated features with a compact light envelope.

  2. 2

    The observed patterns support visual inspection planning, but the source images are not electrical or optical-output tests.

From image contrast to a production decision

What to validate on your part

A useful sample image is the starting point. These are the checks that turn the concept into a defensible inspection.

  1. 01

    Define the visible defect classes

    Include missing, displaced and damaged features as well as accepted pattern variation.

  2. 02

    Check the entire planned field

    Confirm focus and sampling at corners and centre without inferring the source part scale.

  3. 03

    Retain functional testing

    Validate electrical continuity or emitted-light performance separately when required.

Explore your inspection requirements

How many pixels cover your feature?

Compare feature coverage, camera pixel requirements and exposure using your own planning inputs. These are calculated planning values, not inspection results or an accuracy specification.

Editable planning scenario. Adjust these example inputs for your application; they are separate from the source test and 3D setup. Motion allowance and target coverage are starting points to validate, not acceptance limits. Pixel count starts from the proposed camera's catalog resolution.

Object sampling0.04085 mm/px
Pixels across feature12.24 px
Horizontal pixels for target1000 px
Motion during exposure0.2448 px
Exposure ceiling from motion204.2 µs
Formulas and assumptions

The field, feature, speed and exposure start with neutral example values. They are not taken from the source test or the 3D illustration. Allowed motion starts at an editable 0.5-pixel example; it is not a recommended acceptance limit. Target coverage starts at an editable 5-pixel example; it is not a recommended detection or measurement threshold. The horizontal pixel count starts from the catalog Resolution row for MV-CS050-10GM(NPOE). Use the effective width after cropping, binning or decimation if those modes are enabled.

  • Object sampling (mm/px) = field width (mm) / horizontal pixels.
  • Pixels across feature = feature width (mm) / object sampling (mm/px).
  • Horizontal pixels for target = field width (mm) × target pixels across feature / feature width (mm), rounded up to a whole pixel.
  • Motion (px) = speed (mm/s) × exposure (µs) / 1,000,000 / object sampling (mm/px).
  • Exposure for allowed motion (µs) = allowed motion (px) × object sampling (mm/px) / speed (mm/s) × 1,000,000.

The exposure result is the maximum duration from this motion allowance alone. At zero speed, motion sets no exposure limit; the camera, lighting, saturation and other constraints still apply. A shorter exposure does not itself guarantee a reliable inspection.

Field width and feature width refer to the same object plane. The motion calculation assumes uniform linear motion parallel to the field-width direction and a single exposure. It does not model perspective, vibration, rolling-shutter distortion, diffraction, defocus or optical distortion. A strobe may change the effective exposure.

The target result is a horizontal sampling requirement, not a camera recommendation or a change to the selected camera. It uses the effective image width after cropping, binning or decimation and does not determine the vertical resolution or sensor size. Pixel coverage alone does not establish detectability or measurement accuracy. Validate contrast, lens performance, working distance, illumination, calibration, camera exposure limits and the inspection algorithm on representative parts. Changing field width does not change the 3D model or certify that the proposed lens can achieve that field.

The set-up and the parts

Tested lightLS-FCS100, white
Source camera / lensNot specified in the source image caption; proposed parts below
Proposed lens point0.1x at 152 mm, printed lens pair
Derived proposed field84.456 × 70.656 mm = sensor dimensions / 0.1x; not a source test field
Primary light-guide area100 × 100 mm, printed
Primary housing140 × 140 × 10 mm, printed
Separate source alternativeLS-FCS200, white, 200 × 200 mm light-guide area
Mounting (proposed)LS-BT-XZ-G-6-6045; 600 mm column, 600 × 450 mm base, glass tray and two included lighting holders

"Tested" identifies the part named in the source. "Our pick" is a proposed alternative or supporting part. The quote includes only cards marked "In proposed setup", with the quantities shown; other test arrangements are separate. Confirm colour, optics, controllers, power supplies, cables and mounting before ordering.

About this case study: the photos and camera images come from the application laboratory of the maker of the lighting and optics we sell, imaged on the parts shown; your results depend on your part, camera and set-up. This is an application-lab study, not a LumaSpec customer deployment. Source figures are reported results; proposed components require a fresh trial. The 3D scene illustrates the arrangement and does not simulate imaging performance.

More case studies

Start with your inspection requirement

Make the next trial specific.

Tell us the part size, smallest defect or tolerance, available working distance, material and line speed. Include what a good part and a reject look like.

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