Proposal of the simplest and most suitable lens for inner surface inspection in the beverage and automobile industries

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1. Disadvantages of internal inspection using CCTV lenses and fisheye lenses

CCTV lenses and fisheye lenses are often used when inspecting the inner surface of processed parts such as metals and resins and containers. With a CCTV lens, the work (object surface) is rotated and divided images are captured from an oblique angle, but there are problems such as the takt time required for rotation and the inability to focus on the entire area. With a fisheye lens, a 360° field of view can be obtained in one shot, but the short WD (working distance) causes problems such as difficult illumination and large distortion.

CCTVレンズで分割撮像（斜めから撮像）
Split imaging with CCTV lens (oblique imaging)
フィッシュアイレンズで一度に撮像
Imaging at once with a fisheye lens

2. A hole inspection lens that provides a 360° field of view with a single lens

With the Opto Engineering PCHI series that we handle, you can get a 360° field of view at once, and you can get WD, so you can put lighting in. It also features less distortion compared to fisheye lenses. This lens is ideal for inspecting the inner surface of processed parts such as metals and resins, as well as containers.

PCHI SERIES 特殊光学系・360°内面検査用ホールインスペクションレンズ
PCHI SERIESSpecial optical system/hole inspection lens for 360° inner surface inspection
Sample image taken with the PCHI series