Application of Industrial Backlights

Industrial backlights are mainly used in machine vision inspection systems. By providing stable and uniform light, they enhance the contrast between the detected object and the background, helping cameras capture details clearly. They are widely applied in the following scenarios:

Electronics Manufacturing

PCB board inspection: Identifying circuit defects (short circuits, open circuits), solder joint quality, component misalignment, etc. Green or white backlights are commonly used to improve circuit clarity.

Semiconductor/chip inspection: Detecting chip pin deformation, scratches, and packaging defects. Ring lights or coaxial lights can reduce the impact of reflection.

Electronic component inspection: Such as inspecting appearance defects and measuring dimensions of resistors and capacitors. Area lights ensure the uniformity of flat surface inspection.

Mechanical Parts Inspection

Metal parts: Detecting surface scratches, dents, and burrs. Blue or ultraviolet lights can highlight tiny defects; when measuring dimensions and contours, line lights or bar lights combined with line scan cameras improve accuracy.

Plastic parts: Identifying injection molding defects (bubbles, material shortage) and color deviations. White or red lights are suitable for the light transmittance of different materials.

Packaging and Printing Industry

Packaging appearance inspection: Such as damage, stains, and label misalignment of bottle caps and bottle bodies. Ring lights are suitable for inspecting circular objects.

Printed product inspection: Identifying color registration deviations, missing prints, and blurred text in printed patterns. Area lights ensure uniform illumination of large-area printed products.

Food and Pharmaceutical Packaging

Packaging integrity inspection: Such as checking whether aluminum foil seals are tight and for foreign objects in glass bottles. Infrared lights can penetrate transparent packaging to identify internal conditions.

Label inspection: Checking the text clarity of drug and food labels and barcode/QR code recognition. White lights ensure accurate capture of colors and details.

Film and Sheet Inspection

Transparent materials: Such as scratches, impurities, and uneven thickness of glass, films, and plastic sheets. Red or infrared lights enhance the visibility of internal defects.

Coiled material inspection: Detecting surface defects (holes, stains) of cloth, paper, and metal foils. Line lights combined with line scan cameras realize high-speed continuous inspection.

Automobile Manufacturing

Component inspection: Such as tire patterns, brake pad wear, and wire harness connector defects. Bar lights can specifically illuminate local details.

Assembly inspection: Verifying whether parts are installed in place (such as missing screws, snap closure). Area lights ensure the overall visibility of the assembly area.

In conclusion, the core function of industrial backlights is to solve the problem of "seeing clearly" in machine vision. For different scenarios, it is necessary to select suitable light types and parameters based on the material, shape of the detected object and the inspection target.