Specialty LED Lighting

There are hundreds of variations of lighting solutions. Below are examples of some specialized lighting configurations that address specific application requirements. Call R.J. Wilson, Inc. to discuss your unique lighting requirements and how we may help.

Flat Dome Lights

The LFXV Series Flat Dome Light from CCS America is the only light of its type. It addresses a number of limitations found when using a standard dome light. 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 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.

These are examples of how the CCS Flat Domes enhance the appearance of various surfaces and features to enable better image acquisition:

Toothbrush Head in Clear Packaging - Flat Dome
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.

Extreme-Power Strobe Lights

The PF Series of Extreme-Power Strobe Lighting from CCS America provides a level of intensity much higher than any other overdrive LED strobe.

The PF-series Light Units are specifically designed for extreme-brightness strobe lighting and will achieve higher intensity than any conventional products when used with the dedicated PF Control Units. They provide brightness and strobe pulse-width control comparable to a Xenon flash lamp.

  • Strobe time is adjustable from 1 to 100µs.
  • The lighting delay time setting on the Controller, adjustable from 0 to 100µs, permits the timing of the strobe flash to be within the exposure time of the camera, essentially using the strobe flash as the camera shutter.
  • The PF Series High Power Strobe Controllers are sending over 21 amps at up to 48VDC per connector to the high-power PF lights and are available in 2-channel and 4-channel configurations.

When are these Lights Needed?

In some applications, the amount of light intensity required exceeds the ability of the lighting to deliver. This “light starvation” is often the result of:

  • Imaging an object in motion, especially when the object is relatively small, by reducing the camera’s exposure time.
    • Blurring can occur when trying to use very short camera exposure times to capture images during a high-speed motion process and trying to compensate with wider strobe pulses.
  • Using a high-magnification or other specialty lens system that does not transmit as much light to the camera sensor. This is made worse when the part is also in motion.
  • Reducing the aperture of the lens to maintain a specified depth-of-field.

Providing highly controlled, very short and bright strobe lighting pulses will make a noticeable difference in the quality of any captured images.

Currently available PF Series light configurations are shown below:

CCS PF Series Picture

UltraSeal Wash-Down Lighting – True IP69K Protection

The UltraSeal backlights and newly-introduced bar lights from Advanced Illumination are purpose-built to perform in extreme wash-down environments and feature a rare IP69K rating. From liquid immersion to high-pressure steam to corrosive solutions, the UltraSeal products stand up to the realities of what “wash-down” means – both Cleaning and Disinfection.

The UltraSeal lights feature a patent-pending design that is virtually crevice-free, making them ideal for hygienic inspection environments, aseptic manufacturing and packaging, food and beverage applications and any application where a commitment to wash-down protocols is essential to helping ensure consumer safety.

  • IP69K certification ensures a sealed, hermetic housing.
  • There are no exposed screws, gaskets, washers, crevices, or gaps in which contaminants may be trapped.
  • UltraSeal lights have a proprietary FDA-compliant nickel finish that offers more protection against corrosion than stainless-steel.
  • The nickel finish is more inert than stainless-steel.
  • Heat build-up is the enemy of LEDs – the UltraSeal housings are 11X more thermally conductive than stainless-steel.
  • These units can be powered directly from 24V, through Advanced Illumination’s ICS2 or ICS3 inline controllers or with an Advanced Illumination external light controller.
  • Currently, wavelengths of 470nm, 520nm, 660nm, 880nm, and white are available.

The UltraSeal concept is being applied to other Advanced Illumination products, so please contact R.J. Wilson, Inc. for additional information and to discuss your wash-down machine vision lighting challenges.

“Black & Light” Backlight Provides a Matte Black Background When Off

TPL Vision offers a unique LED backlighting solution, called the “Black & Light”, that provides standard backlighting when on and a contrasting matte black appearance when turned off. This can be useful when a single camera station must sequentially provide both back lighting and front lighting. The matte black background helps to absorb, rather than reflect, front lighting, provides higher contrast behind the front-lit object, and mitigates the potential to create additional glare and hotspots in the acquired front-lit image by the surface of the backlight.

This enhances flexibility in machine design by permitting switching between backlighting and front-lighting at the same camera station and optimizing the background for each.

White, red, green, blue, and infrared wavelengths are available, all of which change to a matte black background when off.

Available sizes range from 200mm X 200mm to 1900mm X 900mm. The Black & Light is available in Standard, Overdrive, and Triniti versions.

For more information and a discussion of your application, please contact R.J. Wilson, Inc.

A Bar Light That Improves Homogenous Illumination Coverage by Providing Adjustable Intensity Control for Its Center Section

A linear bar light is often used to provide illumination over a larger field-of-view. A common issue with bar lights is that, depending on the materials or items being illuminated, the center portion of the image can be much more intensely illuminated than the rest of the image. This extra intensity at the center can obscure the features of interest caused by lighting intensity variations, hotspots, or excess glare.

The Patent Pending EBAR Curve from TPL Vision addresses this by offering independent intensity adjustment for the center portion of the bar light. This effect is adjustable to optimize the resulting images, as shown below. Control is either via buttons on the bar light or through a dedicated control line, much like the analog brightness control seen on many LED lights.

The EBAR Curve is available in lengths from 200mm to 1,000mm. LED wavelengths available include, White, Blue, Cyan, Green, Red, and Infrared. The EBAR Curve is available in a standard configuration with continuous or strobing illumination (not an overdrive strobe).

To explore whether this unique bar light can help improve your imaging system, please contact R.J. Wilson, Inc.

Telecentric Backlighting Supports Proper Metrology on Cylindrical or Rounded-Edge Parts

Telecentric lenses are ideal for imaging parts that are cylindrical or have rounded edges because they do not suffer from perspective distortion and are truly imaging the outermost edges of the part. But what about the lighting?

It may be surprising that when using a standard backlight or a backlight using collimation film, it’s possible for the light to “creep” around rounded edges and create “false edges” that might be incorrectly detected by the vision software.

This happens because standard backlights emit light at all kinds of random angles and even backlights using collimating film are only “collimating” to about 30°. This is generally acceptable for imaging parts with straight, flat edges, but even collimation film may not be adequate to fully eliminate the appearance of false edges on rounded parts.

By using a true telecentric backlight, the light rays are nearly perfectly parallel as they emanate from the backlight. A typical fully-telecentric imaging configuration includes a telecentric lens and a telecentric backlight to ensure the light is creating and the lens is accepting only parallel light rays, achieving a truly “silhouette” image with no perspective error. The parallel light rays are not going to create the false edges, illustrated above, that may affect where the edges are located by the vision software and, thus, compromise measurement accuracy.

Opto Engineering’s newest CORE and CORE+ Series of lighting provides true telecentric backlighting in a much more compact package, for situations with limited space or to retrofit an existing imaging system.

For additional information and to discuss your application requirements, please contact R.J. Wilson, Inc.

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
High Color Rendering Lighting Charts