Black & Light (Bn’L)

Diffuse backlight, which can convert into a contrasting black background

Many machine vision systems use multiple light sources. LED panels equipped with white diffusers can interfere with the camera and reduce the efficiency of other illumination sources by scattering light in unintended directions, creating unwanted reflections, and diminishing contrast, which can compromise the quality of the inspection.

The Black & Light (Bn’L) by TPL Vision offers an innovative solution compatible with most vision applications. When the light is on, it works as a traditional homogeneous backlight, highlighting the shape of objects and creating a uniform silhouette. When it’s off, it becomes a matte black background. This is extremely useful when other illuminations are used, as the black background absorbs scattered light and ensures that panels equipped with white diffusers do not interfere with how light is perceived by the camera.

MATT DIFFUSER = BLACK BACKGROUND,
ULTRA THIN BORDERS,
RISING TIME : 25 μs.

Available as OverDrive

The Bn’L OverDrive version is just as easy to set up and use as the Standard version. Equipped with specialised electronics, it allows for independent control of the lighting power. This version is designed for users who need to customise the luminous flux precisely.

Available in the same sizes as the standard Bn’L, the OverDrive version can achieve brightness levels of 6500 lux. This feature is extremely useful for applications requiring short bursts of intense illumination, such as high-speed inspections and detailed surface analysis.

Case Study: Tablet Shape and Imprint Inspection using the Bn’L

This pharmaceutical pill inspection application uses the Black & Light (Bn’L) illumination as part of the vision system to enhance the manufacturing process. The dual-feature inspection ensures comprehensive quality assurance by addressing both physical characteristics (shape and size of the tablets) and the presence of necessary imprint codes (batch/lot number, expiration/manufacturing date, branding or generic identification).