Standard LED Lighting

Standard LED lights are offered in a wide range of shapes, sizes, working distances, coverage areas, wavelengths, and lighting techniques. There is generally an “ideal” lighting configuration for your specific application.

With literally thousands of choices, R.J. Wilson, Inc. and its lighting partners have the real-world experience and technical know-how to help you select a lighting configuration that is optimized for your application requirements.

Things to Consider

Form Factor

Which lighting technique and light shape evenly illuminate the object to make the features-of-interest and the defects most reliably and repeatably visible to the inspection software?

Standard LED Lighting
Spectrum Dome, AI Backlights, AI Bar, AI On-Axis, CCS FPQ, CCS Ring, SVL Brick

Wavelength

What “color” LED is best to make the key inspection features and defects most visible and with the highest contrast so that the inspection software can make a valid pass/fail decision? Available wavelengths range from the Ultraviolet, through the visible colors of the rainbow, to Infrared.

LED Wavelength

What If I Have a Smart Camera or Barcode Reader with Built-In Lighting That’s Not Sufficient for My Application?

Although the built-in lighting in a vision sensor is convenient, it sometimes limits the imaging system’s ability to properly highlight the features of interest. The Optical Trigger from TPL Vision provides a simple means to utilize external lighting by sensing when the built-in lighting turns on and triggering an external light within a maximum of 4µs. The external light must be 24V and can be up to 4A.

No additional wiring of the trigger function from the vision sensor is required. The Optical Trigger mounts to the front of the vision sensor or barcode reader and is “triggered” by the built-in lighting itself.

Examples of Models Compatible with the Optical Trigger

Cognex In-Sight 2000

Cognex In-Sight 7000 C

Cognex Checker

Cognex DM50/60

Cognex DM150/260

Cognex DM300/360

Datalogic VS2

IFM O2D

Keyence SR750

Keyence SR1000

MicroScan Hawk Integrated

MicroScan ID40

Omron FQ2

Sensopart Visor

SICK Inspector Series

SICK Lector 63x

To determine whether this option may be applicable to your vision sensor or barcode reader, please contact R.J. Wilson, Inc.

LED Lighting Controllers

Basic Light Control

  • Basic controllers, whether internal or external, provide a higher-quality regulated electrical power connection and a “cleaner” means to adjust the intensity.
Manual Intensity Control
  • When motion is involved, many internal and inline controllers can provide strobe capability.
    • With an internal or inline driver, the width of the light’s strobe output pulse corresponds to the width of the input trigger pulse.
    • The strobe intensity will not exceed the maximum “always on” brightness, but will “flash” for a short period, effectively “stopping motion” when sufficient light intensity is provided.
  • When additional light intensity is required, Internal and inline controllers with “Overdrive” strobe capability provide a higher-than-normal current to the light upon receiving the trigger pulse, increasing the light’s intensity by 4X-8X during the strobe pulse.

External Light Controllers

External controllers typically either have knobs to control intensity or are completely programmatic in use. Both types provide single or multiple channels, triggering, and communication capability. Many provide overdrive capability.

Electronic Intensity Control

When tight, integrated control of multiple lighting and trigger parameters or multiple lighting channels are required, an external lighting controller provides web-browser set-up or programmatic capabilities that permit tighter integration of the lighting controls into the vision system. External controllers may feature:

  • Faster and more controlled triggering, as the trigger occurs as soon as the rising or falling edge of the trigger pulse is detected by the external controller.
  • Additional trigger pulse, trigger delay, strobe pulse-width, intensity, sequencing control, and other parameters are configured and saved within the lighting controller. These parameters may be saved as a “recipe”, which can be later loaded via external communication.
  • Overdriving capability, with built-in safety sensing of the connected light so as not to blow the LEDs.
  • 1-16 channels of light control.
  • External communication capability with the machine vision or machine control system, whether using GigE Vision, GeniCam, Ethernet socket, parallel, RS-232, Ethernet IP, or other communication protocol.
  • A lighting SDK that can be integrated into the machine vision control software to permit even tighter communication between the PC, the vision application, and the lighting controller.
  • Easier control when using multiple wavelengths, light types, and Computational Imaging lighting.
Light Controllers

Contact R.J. Wilson, Inc. to discuss your external light control requirements.