Product inspections take too long. 
Learn what the keys to efficiency enhancement are.

• Variations in detection accuracy occur when inspecting more than a single piece at a time.
• A tremendous number of man-hours is needed for the selection, evaluation and adjustment of the equipment when introducing a vision system.

• Consistent resolution performance is realized at the center and edges of the image, which reduces recognition errors for individual pieces.
• High resolution is maintained in various shooting conditions, resulting in shorter selection, installation and adjustment times for the vision system.

Company C manufactures many kinds of containers with different sizes and designs. Therefore, the shooting conditions such as distance and aperture vary depending on the container. The shooting conditions had to be reviewed each time the container capacity is changed or a new product is introduced, which occurs frequently. But variation in the inspection results occurred every time the shooting distance or aperture was changed, which made the personnel in charge of the system extremely busy trying to identify the cause.

The worker at Company C was troubled because no matter what they did they could not successfully inspect as many products at once as they needed to. This problem can be solved with lenses capable of consistent resolution from the center all the way to the edges of the image frame. Generally, lenses are designed to have the best resolution at a predetermined standard shooting distance (design distance). Therefore, the edges of the image may become blurry when the distance is changed, which prevents inspection of the products at the edges. Fujifilm "4D High Resolution" lenses for machine vision cameras adopt the floating design. The lens elements are configured into front and rear groups, and only the lens elements behind the iris move to focus. This restrains the drop in resolution caused by changing shooting distances. In addition, alignment of the entire lens constructions with micrometer-level adjustments during assembly almost completely eliminates one-sided blur caused by misalignment of the lenses. The containers placed at the edges are not out of focus when as many of them are put in the shooting area as possible. As a result, Company C is now able to conduct efficient inspections.

In inspections using a vision system, the resolution performance may be degraded when the shooting conditions such as the distance from the product and aperture are changed. This is because the optimum shooting conditions for the best performance of the lens are predetermined. For companies that manufacturer many products with a large variety of sizes and designs like Company C, it was very difficult to figure out what lens would be the most suitable for what containers. Fujifilm developed "4D High Resolution" lenses that deliver consistent resolution from the center to the edges of the image even when the shooting conditions are changed, which is a testament to Fujifilm's abundant design and manufacturing know-how as a comprehensive lens manufacturer. This has successfully eliminated the bothersome task of lens selection. As one lens is capable of inspecting a wide variety of containers, Company C has been freed from the problem of lens selection. In addition, the camera can be installed anywhere, at the top, bottom, left, right or diagonally to the product, which results in shorter system installation and adjustment times.

"4D High Resolution" lenses
HF-XA-5M series

• * This story was arranged based on actual facts.