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Ring Lights for Industrial Image Processing

The wenglor LRL ring light is equipped with LEDs arranged in a circle that ensure uniform illumination intensity across the entire test object. With two sizes and three light colors, it is suitable for a wide range of applications and camera requirements in industrial image processing. The optional angle changers enable flexible adjustment of the illumination angle, allowing for better field of view homogeneity. The LRL ring light is characterized by its durability, reliability and energy efficiency, making this illumination technology the ideal choice for quality control, surface inspection and object identification in challenging industrial environments.

Two sizes

IP67 degree of protection

Simple mounting

Strobe and continuous mode

Angle Changer

Three light sources

Illumination Methods with Ring Lights

The use of ring lights in industrial image processing varies depending on the working distance. The following illumination methods are usually used:

Illumination from Oblique Angle

When the LRL ring light is oriented at a small angle to the test surface, glare is reduced and edges, scratches and engraved marks are highlighted.

Bright Field for Long Working Distances

With an illumination intensity of up to 150,000 lux, the LRL ring light emits intense light, which ensures optimum illumination even at large working distances.

Feature Video

High User-Friendliness and Flexibility

Two Different Ring Light Sizes

LRLx100 Small ring light
- Suitable for confined spaces and compact applications
- Provides a smaller visual field and ideal for smaller working ranges
LRLx200 Large ring light
- For larger lenses needed for high resolutions
- Higher power for larger, more demanding applications

Compatible with Angle Changers

Various variants with magnetic mounting, alignment pins and locking screws for permanent mounting
Very bright, uniform and diffuse lighting solution with different beam angles without shading
Available in both ring illumination sizes

Angle Changer System Overview

LRLx100 Small Ring Light


ZRLG001	±10 degree beam angle
ZRLG002	±17 degree beam angle
ZRLG003	±25 degree beam angle
ZRLG101	±10 degree beam angle/polarized
ZRLG102	±17 degree beam angle/polarized
ZRLG103	±25 degree beam angle/polarized
ZRLG104	Polarized only

LRLx200 Large Ring Light


ZRLG004	±10 degree beam angle
ZRLG005	±17 degree beam angle
ZRLG006	±25 degree beam angle
ZRLG105	±10 degree beam angle/polarized
ZRLG106	±17 degree beam angle/polarized
ZRLG107	±25 degree beam angle/polarized
ZRLG108	Polarized only

Flexible Mounting Options

Six M4 mounting threads
Comprehensive assembly accessories including mounting adapters
Connection via a 5-pin M12 plug

Three Different Light Types

Available in the light sources white light, red light and infrared light.
Positioning within the electromagnetic spectrum:
- White light 5,700 K
- Red light 630 nm
- Infrared light 850 nm

Light Output of the Ring Light with White Light

	60 mm working distance	100 mm working distance	200 mm working distance	500 mm working distance	1,000 mm working distance
LRLW100, continuous mode	18,000 Lux	56,500 Lux	79,000 Lux	26,500 Lux	7,600 Lux
LRLW100, strobe mode overdrive	65,800 Lux	201,600 Lux	284,400 Lux	93,600 Lux	27,300 Lux
LRLW200, continuous mode	2,200 Lux	5,800 Lux	23,000 Lux	53,000 Lux	29,000 Lux
LRLW200, strobe mode overdrive	6,900 Lux	18,200 Lux	7,200 Lux	166,000 Lux	91,000 Lux

60 mm working distance
LRLW100, continuous mode 18,000 Lux	LRLW100, strobe mode overdrive 65,800 Lux	LRLW200, continuous mode 2,200 Lux	LRLW200, strobe mode overdrive 6,900 Lux
100 mm working distance
LRLW100, continuous mode 56,500 Lux	LRLW100, strobe mode overdrive 201,600 Lux	LRLW200, continuous mode 5,800 Lux	LRLW200, strobe mode overdrive 18,200 Lux
200 mm working distance
LRLW100, continuous mode 79,000 Lux	LRLW100, strobe mode overdrive 284,400 Lux	LRLW200, continuous mode 23,000 Lux	LRLW200, strobe mode overdrive 7,200 Lux
500 mm working distance
LRLW100, continuous mode 26,500 Lux	LRLW100, strobe mode overdrive 93,600 Lux	LRLW200, continuous mode 53,000 Lux	LRLW200, strobe mode overdrive 166,000 Lux
1,000 mm working distance
LRLW100, continuous mode 7,600 Lux	LRLW100, strobe mode overdrive 27,300 Lux	LRLW200, continuous mode 29,000 Lux	LRLW200, strobe mode overdrive 91,000 Lux

* The measurements were taken in the center of the light field without the use of an angle changer.

Convergence Light Attachment

The convergence light attachment is a kind of angle changer that can be used to effectively focus light. This minimizes ring effects, which often lead to uneven illumination of the center of the test object.

Additional Highlights of the LRL Ring Light

Direct Mounting of the LRLx100 on C Mount Lenses

The small LRLx100 ring light can be attached directly to C mount lenses using a special adapter. In this way, the illumination system is directly integrated without the need for additional brackets or mounting elements. The ring light is automatically centered and positioned in line with the camera’s field of view by direct connection to the C mount lens, ensuring that the test object is always ideally illuminated. This configuration requires only one camera or light mount, simplifying setup and minimizing space requirements, which is especially beneficial for quality control or surface inspection in confined application environments.

Applications

Decoding DataMatrix Codes

In the automotive industry, the quality of individual components of passenger car interior doors, such as window controls or armrests, must be visually checked for different types of door at the same time. A vision system with several cameras is installed for this purpose.

End-of-Line Visual Quality Inspection

Engine manufacturing in the automotive industry requires an end-of-line quality control at the end of each production line. This prevents faulty engines from leaving the production line. For this purpose, a vision system consisting of cameras, lenses and illumination is installed on several robot arms.

Visual Quality Assurance for Oil Canisters

Injection molded parts made of plastic must be visually inspected for defined quality characteristics after production. For example, a vision system checks the geometry, color, inclusions, overspray or underspray or spout separations on oil canisters.

Position Check of PCBs

Before PCBs are loaded in SMD systems, they must be placed in the correct position. For the position test, a vision system is installed above the PCBs, which records a crosshair printed on the circuit board as a reference point. From this, the so-called “offset” is determined and transferred to the machine control.

Illumination of Mounting Holes

Before installing car seats, a machine vision camera is used to check whether the mounting holes have the required threads. To do this, the holes are illuminated with ring lights. A compact design with multiple cameras and ring lights allows simultaneous inspection of multiple holes in confined spaces.

Orientation of Beverage Cans

Once beverage cans have been filled, labels are applied on the cans with millimeter precision. A side-mounted vision system captures multiple images of the can per second, identifying features such as 1D codes. If these are detected and thus the position of the can is detected, the label application is triggered.

Label Check on Spreadable Cheese Packaging

When filling different types of spreadable cheese, it must be ensured that the correct lid with logo is applied to each package. For this purpose, a vision system is installed on the conveyor line, which checks and compares the lids from above using a camera during operation.