New Development Consulting Hotline in LED Lighting: 18688669282

LED lighting is experiencing a rapid market growth period in various applications. Many of these applications make use of the high brightness and efficiency of color LED, which can be used in various configurations on the market.

When selecting LED lighting for machine vision applications, it is necessary to maximize the contrast between the target characteristics and their background, while minimizing the impact of any ambient light. To do this, developers can choose annular, linear, strip, coaxial, dome, dark field, backlight and telecentric lighting. Many companies, including Trunda, can provide the above lighting products for machine vision system developers.

By implementing the right type of lighting for any given application, tasks such as bar code reading, measurement and product identification can be performed more easily, and machine vision systems can be more accurate, reliable and repeatable.

For any given detection application, although it is necessary to test different lighting configurations before deciding on the best lighting mode, understanding the properties of the detected parts can simplify the process. This process can be simplified by considering the size, geometry, color, texture, working distance between parts and lighting source, and the required detection speed.

Fortunately, there are many resources that can help system developers choose the right type of light source. In a downloadable product brochure entitled "Machine Vision Precision Lighting", various lighting products from circular to dome lamps are shown, and how they can best be used to optimize the contrast of product features, ranging from engine cylinders, bottles, bulbs to printed circuit boards. Other companies, such as Opto Engineering (www.opto-engineering.com), provide more professional information on how to use telecentric lenses and telecentric lighting.

Novel lighting configurations can be used to meet many different types of applications. For example, in Trundle's Eclipser dark-field backlight design, LED lights are combined with light forming optics to allow system developers to see previously transparent parts such as glass or moulded plastics.

Web applications can also benefit from the latest developments in LED line-scan light sources. Because this kind of application usually runs at high speed, it is very important to provide maximum illumination for this kind of application. Recognizing this, Trunda has developed what it claims to be the most powerful fully focused linear light source on the market. Even at a recent exhibition, the company asked visitors to wear a mask before viewing the Line High Power (LHP) series of light sources. The linear light source uses 192 LEDs in each 300 mm length, requiring air-cooled or liquid-cooled cooling controlled by an external cooling system.

Uniform illumination

In other applications, it is usually necessary to provide uniform illumination to the area where the detected object is located. In this case, it is necessary to use a short working distance light source, because the farther the light source is placed, the easier it will be displayed as a point light source, which will lead to a decrease in the uniformity of lighting. For example, a dome lamp can be used to provide uniform illumination when detecting the rim of a car with a high reflective surface. However, these light sources are usually large and expensive.