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Low Power LED Backlight for Vision Inspection

KCS Machine Vision LED Backlight is designed for high-contrast industrial inspection applications that require stable, uniform, and low-power illumination. It is ideal for contour detection, dimension measurement, transparent object inspection, scratch detection, and liquid level inspection.

Featuring evenly distributed high-quality LEDs and a precision optical diffuser, this backlight delivers excellent brightness uniformity and sharp image contrast. The emitting area, opening size, wavelength, and installation structure can all be customized to match different machine vision systems and inspection tasks.

Whether used in electronics, packaging, medical devices, automotive parts, or precision measurement, this backlight provides reliable optical performance for automated inspection and industrial vision applications.
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High Illumination Uniformity

The LEDs inside the backlight are scientifically arranged to achieve even light distribution across the entire emitting area. This uniform illumination helps eliminate dark zones and brightness inconsistency, allowing the camera to capture sharper edges and more stable object silhouettes. For applications such as contour measurement and precision positioning, high uniformity is essential for achieving repeatable inspection results.

Low Power Consumption

This backlight is designed with energy efficiency in mind. It delivers strong and stable illumination while maintaining relatively low power consumption, helping customers reduce system energy usage and improve the efficiency of long-term operation. This is particularly valuable in automated production lines where lighting systems run continuously for extended hours.

Excellent Contrast for Vision Inspection

Backlighting is one of the most effective illumination methods for creating high-contrast images of parts and materials. By placing the light behind the target object, the system can clearly distinguish the outline, holes, slots, and external shape of the object from the background. This makes the product highly suitable for dimension measurement, presence detection, edge positioning, and transparent object inspection.

Customizable Emitting Area and Structure

Different inspection projects require different light sizes, working distances, and camera openings. KCS supports customization of the emitting area, external dimensions, center opening, light thickness, installation holes, cable position, connector type, and housing structure. This allows the backlight to be integrated into different automation systems with greater flexibility.

Multiple Light Color Options

To meet the imaging needs of different materials and inspection tasks, the product is available in multiple light colors and wavelengths, including white, red, blue, green, and infrared. Different wavelengths can improve contrast on specific surfaces, materials, or transparent objects, helping users achieve more accurate detection results.

Stable Brightness and Long Service Life

Manufactured with high-quality LEDs, durable structural materials, and strict production standards, the backlight is designed for continuous industrial operation. It maintains stable brightness, reliable optical performance, and long working life, helping reduce maintenance frequency and system downtime.

Easy Controller Integration

The backlight can be matched with analog controllers, digital display controllers, or strobe controllers according to the inspection mode and application requirements. This enables flexible brightness adjustment and supports different machine vision environments, including high-speed production lines.

How Machine Vision Backlighting Works

A machine vision backlight is installed behind the object being inspected. When the light passes around or through the object, the camera sees the part as a dark shape against a bright background. This creates a high-contrast image that makes it easier for vision software to analyze the object’s contour, dimensions, edge quality, openings, and transparency characteristics.

Backlighting is one of the best illumination methods for applications where:

  • the shape of the object must be measured accurately

  • the outline of the object must be clearly separated from the background

  • transparent or translucent materials need to be detected

  • small slots, holes, burrs, or missing features need to be identified

  • liquid level or fill height needs to be inspected

Because the inspection result depends strongly on image contrast and edge clarity, the quality of the backlight has a direct impact on the performance of the entire vision system. A stable and uniform backlight helps reduce false detection, improve repeatability, and support faster inspection speeds.

Typical Applications

KCS Machine Vision LED Backlight is designed for industrial vision systems that require high contrast, clear object outlines, and reliable imaging performance. It is widely used in the following applications:

Surface Defect Detection

Used for detecting cracks, scratches, holes, chips, and edge defects on transparent or semi-transparent materials such as glass, plastic sheets, films, and thin precision parts.

PCB and Electronics Inspection

Suitable for inspecting PCB outlines, connectors, electronic parts, and structural features where high-contrast imaging is required for automated vision inspection.

Transparent Material Inspection

Ideal for glass, plastic film, acrylic, medical packaging, and other transparent materials that require enhanced edge visibility and defect detection.

Flat Panel and Optical Component Testing

Used for inspecting flat displays, optical sheets, thin panels, and related components where stable and uniform backlighting improves image clarity and inspection reliability.

Dimension Measurement

Provides sharp silhouettes for accurate measurement of object profile, width, diameter, openings, gaps, and external dimensions.

Automated Sorting and Position Detection

Applicable to automated production lines for sorting, counting, positioning, and presence verification based on object outline, size, and transparency differences.

Wavelength/Color Temperature

Red (R)

620-630nm

Green(G)

520-530nm

Blue (B)

460-470nm

White (W)

6500±500K

Infrared (IR)

850/940nm

Ultraviolet (UV)

365-405nm

Save environment

humidity

-20-60°C

humidity

20-80% (non condensing)

Usage environment

0-40°C

Select accessories

Light source extension cable, diffuser plate

Optional controller

KCS-CKKAC2 series, KCS-CKKDC series, KCS-CKKWDC series, KCS-CKSC series

Service life/warranty

When the ambienttemperature is 25°C. the brighiness of the lightsource wil decrease by less than 30% atter 10000 hours ofuse (excluding ultraviolet

When the ambienttemperature is 25°C. the 100% brighiness of the ultraviolet lightsource willdecay by less than 30% after 1000 hours of use

Wthinone year of shipment,ifthere is a malfunction due to non -human factors, free repairorreplacement services willbe provided

Naming rules
KCS   -   CKGP   -   40   -   50   -   R
Brand    Side light guide source    Luminous length    Luminous width    Luminous color
Product model and specifications
NO. Model Power/W Luminous surface size mm Recommended extension cable Recommended controller
R G/B/W
1 KCS-CKGP-40-50 2.8 3.2 40*50 SE、FE系列 KCS-CKKAC2系列
KCS-CKKDC系列
KCS-CKKWDC系列
KCS-CKSC系列
2 KCS-CKGP-90-100 5.6 7.2 90*100 SE、FE系列
3 KCS-CKGP-140-100 8.4 10.6 140*100 SE、FE系列
4 KCS-CKGP-140-150 8.4 10.6 140*150 SE、FE系列
5 KCS-CKGP-190-150 11.2 14 190*150 SE、FE系列
6 KCS-CKGP-190-200 11.2 14 190*200 SE、FE系列
7 KCS-CKGP-240-200 14 17 240*200 SE、FE系列
8 KCS-CKGP-240-250 14 17 240*250 SE、FE系列
9 KCS-CKGP-290-200 16.8 20.8 290*200 SE、FE系列
10 KCS-CKGP-290-250 16.8 20.8 290*250 SE、FE系列
11 KCS-CKGP-290-300 16.8 20.8 290*300 SE、FE系列
12 KCS-CKGP-340-250 19.6 24 340*250 SE、FE系列
13 KCS-CKGP-390-300 22.4 27 390*300 SE、FE系列
14 KCS-CKGP-440-350 25.2 30 440*350 SE、FE系列
15 KCS-CKGP-440-400 25.2 30 440*400 SE、FE系列
16 KCS-CKGP-590-400 33.6 48 590*400 SE、FE系列

Model List

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Contour Detection of Cross-Shaped Parts

Project Overview

This application demonstrates the use of a machine vision LED backlight for precise contour detection of cross-shaped components. The goal is to accurately capture the outer profile and edge details of the part for automated inspection and measurement.

Inspection Object

  • Object Type: Cross-shaped building block

  • Material: Solid industrial component

  • Inspection Target: Contour shape and edge accuracy

Inspection Challenge

Due to the curved edges and irregular contours of the object, it is difficult for standard front lighting to clearly capture the true edge profile. The lack of contrast often results in blurred boundaries, making accurate contour detection and measurement unreliable.

Lighting Solution

KCS machine vision LED backlight is used to provide uniform illumination from behind the object. By generating a high-contrast silhouette, the system is able to clearly separate the object from the background and accurately define its outer contour.

  • Lighting Model: KCS-CKP-103-106-W

  • Lighting Type: LED Backlight

  • Lighting Method: Back illumination

Imaging Result

With the use of uniform backlighting, the captured image shows a clear and sharp outline of the object. The edges are well-defined, enabling precise contour extraction and improving detection accuracy.

Software Processing Result

After image acquisition, machine vision software processes the high-contrast image to accurately identify the contour edges. This allows for reliable shape recognition, dimensional measurement, and defect detection.

Key Benefits

  • Clear object silhouette for accurate contour detection

  • Enhanced edge definition and contrast

  • Improved measurement precision

  • Stable and repeatable inspection results

  • Suitable for complex shapes and irregular edges

Typical Applications

This solution is widely used in:

  • Precision component contour inspection

  • Automated dimension measurement

  • Shape recognition and positioning

  • Industrial quality control systems

  • Electronics and mechanical parts inspection

Q1: What is the minimum order quantity (MOQ) for machine vision LED backlights?

A: The minimum order quantity (MOQ) for our machine vision LED backlights is 1 piece. We support small trial orders so customers can test the lighting performance before placing bulk orders.

Q2: Do you support custom machine vision backlights?

A: Yes, we provide full customization services for machine vision LED backlights. You can customize:

  • emitting area size

  • outer dimensions

  • center opening

  • light color and wavelength

  • brightness level

  • cable length and connector type

  • mounting structure

We can recommend the most suitable backlight solution based on your inspection requirements, camera setup, and application scenario.

Q3: What is the lead time for machine vision backlights?

A:

  • Standard products: 3–5 working days

  • Custom products: typically 7–10 working days

For complex customization or large-volume orders, the lead time may vary. Please contact us for an accurate production schedule.

Q4: What is the warranty period for your machine vision lighting products?

A: We provide a 1-year warranty for all machine vision LED backlights. During the warranty period, we offer free repair or replacement for quality-related issues under normal operating conditions.

Q5: Do your products have CE certification?

A: Yes, our machine vision lighting products are CE certified, ensuring compliance with international safety and quality standards. Certification documents can be provided upon request.

Q6: What is a machine vision LED backlight used for?

A: A machine vision LED backlight is used to create high-contrast images by illuminating the object from behind. It is widely used for:

  • contour inspection

  • dimension measurement

  • transparent material detection

  • hole and slot detection

  • liquid level inspection

Q7: How do I choose the right machine vision backlight?

A: When selecting a machine vision backlight, you should consider:

  • object size

  • inspection purpose

  • material type (transparent, reflective, dark)

  • camera and lens setup

  • installation space

If you are unsure, our team can recommend a suitable model based on your application.

Q8: Can the backlight be customized with a center opening?

A: Yes. We support custom center openings for machine vision backlights. This is useful when the camera needs to view through the light or when space is limited in the inspection system.

Q9: Which light color is best for machine vision backlighting?

A: The optimal light color depends on the material and inspection goal:

  • White light: general-purpose inspection

  • Red light: improves contrast for metal and dark objects

  • Blue light: suitable for fine detail detection

  • Infrared: used for special materials or filtering effects

We can help select the best wavelength for your application.

Q10: Can your backlight work with machine vision controllers?

A: Yes, our LED backlights are compatible with:

  • analog controllers

  • digital display controllers

  • strobe controllers

This allows flexible brightness adjustment and synchronization with high-speed inspection systems.

Contact Us

WhatsApp: +85259541400
Tel: +86-13924345841
Email: kcsshunshangxin@gmail.com
Add: 2nd Floor, Building A2, Zhongchuanghui Zhiying Technology Park, No. 51 Xinhe Road, Wanjiang Street, Dongguan City, Guangdong Province, China

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