A specialist website by Oxford Industrial Automation

UK robot & vision integration · 01865 416830

Image contrast

Industrial machine vision lighting

Reliable vision starts with controlled light. We select illumination geometry, wavelength, intensity and diffusion to make the required feature stable while suppressing reflections, shadows and ambient variation.

Industrial robot arms around an unfinished car body.
GeometryFront, back, dark-field, low-angle or diffuse light
SpectrumWhite, coloured, infrared or ultraviolet where suitable
ControlContinuous, strobed, polarised and monitored illumination
01 / Engineering focus

Make the feature visible and repeatable

Lighting is selected around the optical behaviour of the product. A glossy film, embossed code, machined edge and translucent container each need a different approach.

  • Backlighting for profile and dimensional edges
  • Diffuse dome or coaxial light for reflective surfaces
  • Dark-field illumination for scratches and raised detail
  • Polarisation to control glare
  • Strobed light to freeze fast movement
02 / Engineering focus

Protect the image from the factory environment

Enclosures, shrouds and controlled mounting reduce the effect of daylight, overhead fittings, dust and accidental movement. Maintenance access and cleanability are considered with image quality.

  • Ambient-light shielding
  • Rigid, adjustable mounts with position reference
  • Contamination-resistant windows and air purge options
  • Lighting health and intensity monitoring where required

System sequence

Engineer the complete decision loop.

Every stage is tested against the product, timing, interfaces and agreed response.

01

Reveal

Choose contrast that separates the required feature.

02

Suppress

Reduce glare, shadow, texture or unwanted background.

03

Stabilise

Shield the scene from ambient and positional change.

04

Maintain

Provide access and checks that protect image quality.

Typical applications

Where this capability can fit.

Final suitability and performance are confirmed only after review of the complete production application.

Reflective surface inspection
Silhouette measurement
Embossed feature detection
Print and code contrast
High-speed image capture
Ambient-light control

Application questions

What manufacturers ask.

These answers provide a starting point. Product trials and line data determine the project specification.

Why not use the factory's existing lighting?

General lighting is designed for people, not stable image contrast. Its position, frequency, intensity and ambient contribution may vary in ways that reduce inspection reliability.

Can lighting reduce reflections on shiny packaging?

Yes. Diffusion, angle, polarisation and wavelength can all help, although the best combination must be trialled against the actual surface and feature.

What is strobe lighting used for?

A short, intense pulse can freeze product motion and increase usable contrast while limiting heat and average power. Trigger timing must be synchronised to image capture.

Start with the production task

Show us what the system needs to see and move.

Use the project brief form, or email product photos or video with the target output, current layout and required decision. We will define the next technical step.

Project brief