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

Specialty LED Lighting

With hundreds of lighting options on the market, it’s rare to come upon a completely unique light. The LFXV Series Flat Dome Light from CCS America is the only light of its type and better addresses many diffuse lighting requirements.

First, what is a flat dome? We’re all familiar with a typical dome light. They’re great for creating diffuse lighting environments that minimize specular reflections from uneven surfaces, remove reflections from plastic wraps, and change the appearance of surface texture. However, their mechanical size and the nature of imaging through a small hole in the top limit their effective use.

A flat dome does the same thing and more. Rather than being in the shape of a dome, it’s a 10mm thick side-fired flat light with very small printed features that reflect light downward across the entire surface, providing a diffuse lighting environment without interfering with the imaging process. The image is taken through the flat dome. The area above the flat dome is wide open, greatly increasing the options for working distance, depth-of-focus, and field-of-view. There is also no hole to reflect off the imaged surface or to limit the lens options, as with a standard dome light.

The existing LFX3 and the new LFXV Series Flat Domes are available in 4 colors (red, white, blue, and infrared), and a range of sizes from 25 X 25mm to 200 X 200mm.

To the right are examples of how the CCS Flat Domes enhance the appearance of various surfaces to enable better machine vision:

Unlike a typical dome light, changing the working distance of the flat dome above the workpiece results in the enhancement of some features, rather than becoming un-usable.

High Color-Rendering (Natural-Light) LED Lights

High color-rendering (natural-light) LEDs produce smooth continuous light spectrum characteristics across all wavelengths, similar to the light spectrum of sunlight. While normal white LEDs have some wavelength regions that are very strong or even missing, high color-rendering LEDs cover almost the entire range of visible light.

In general, a light source with good color-rendering properties can faithfully reproduce the color tint of an object. This is especially important when trying to distinguish subtle color variations to identify an object based on its color.

Users of microscopes can benefit from the use of a high color-rendering LED ring light, available from R.J. Wilson, Inc., to improve manual color interpretation and to relieve eye-strain.

Graphic Courtesy of CCS America

Brightness-Sensing Lighting

Brightness-Sensing Lighting allows for automatic brightness maintenance and control during continuous and short-duration illumination. The built-in photodiodes are used to monitor the brightness in order to provide feedback on long-term brightness deterioration, making it possible to maintain the factory default brightness for around 50,000 hours by automatically adjusting light power to maintain the specified light brightness.

Falux Sensing
Graphic Courtesy of CCS America

Ultra-Bright Lighting

One of the most common complaints when processing line scan images or very-high-speed area scan images is “light starvation”. That is, there isn’t enough light to deal with the very short exposure times that are required to address the application properly. Our ultra-bright lights and dedicated strobe-only controllers address this and are available in a wide range of form factors for line scan imaging, as well as very-high-speed area-scan imaging.

LED Lighting Controllers

What kind of light control is required? Solutions are available for strobing, multi-camera & light imaging, multiple light configurations used with a single camera, and sequential acquisition for computational imaging.

What is the source of light and trigger control? Many lighting controllers have a Gig-E interface port as well as web-page-based setup. Light controllers can integrate with vision software libraries, smart cameras, PLCs using Ethernet/IP, GeniCam, or through a trigger output on the camera.

How many light control channels are needed and what is the maximum current being drawn from each channel of the controller?

How how long does the light pulse need to be once it is triggered and what is the amount of time between triggers?

LED Lighting Controllers
Gardasoft RC120, CCS CN Controller, CCS Controller Power Supply, Gardasoft LED Strobe Controller, Pulsar 320 Controller