	Machine Vision Systems

Detection of the Dimensions and Shape of Transparent Objects

High-precision Detection by Creating an Edge on Transparent Workpiece with Transmitted Light

Detection of Transparent Liquid Level

Back lighting allows the level of transparent liquid within in a transparent or translucent container as well as any floating cap or wrongly-positioned label to be detected.

Detecting a liquid level with a backlight

In the case of simple reflected light

Detecting a liquid level with regular illumination

The surface of the container reflects, making it impossible to detect the liquid surface.

In the case of back light

Detecting liquid level with backlighting

Because the liquid surface is projected as a shadow, it is detected as the edge.

Back Light Method Lighting Technique

A back light method projects the contour of the workpiece using transmitted light from behind the workpiece. Compared with a direct irradiation method, which is easily affected by the actual conditions of a workpiece surface, this method enables stable, high-precision shape and dimensional detection.

Detection of Edges of Thin and Transparent Sheets

Width Inspection of Transparent Sheet

The width of thin, transparent glass or resin sheets is inspected.

Measuring the thickness of a transparent sheet

In the case of simple reflected light

Detecting a transparent sheet with regular illumination

The edges are unclear.

In the case of bar light

Detecting a transparent sheet with bar illumination

The edges shine clearly.

Bar Light Lighting Technique

The compact bar system allows users to freely set the irradiation angle. Only the diffuse-reflection of edges is photographed and detected by oblique irradiation, making it suitable for inspections in places where the back light cannot be fixed.

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