Small Cavity Inspection with Nano Hypercentric Lenses

Micro Hole Inspection

The modern manufacturing industry faces significant challenges when it comes to inspecting parts, particularly in the optical inspection of small-diameter holes and cavities. Opto Engineering introduces the new HCN nano hypercentric lenses that deliver unmatched precision, versatility and compactness for the inner inspection of micro cavities.

Bild: Opto Engineering S.p.A.Bild: Opto Engineering S.p.A.

Bild: Opto Engineering S.p.A.Bild: Opto Engineering S.p.A.
Image 3 | Inspection of 1mm smartphone threaded hole, M6 blind hole thread, 1mm diameter dental implant screw, 8mm rivet hole, 5mm marked metal hole of an automotive component (f.l.t.r.).

Bild: Opto Engineering S.p.A.Bild: Opto Engineering S.p.A.
Image 2 | Working principle of the nano hypercentric lens of the HCN optics designed for inner inspection of small cavities and hollow parts with diameters from 0.75 to 10mm.

Inspecting inner surfaces and complex components, such as threaded holes, internal conduits, and microcomponent cavities, poses numerous challenges for industry operators.

Bild: Opto Engineering S.p.A.Bild: Opto Engineering S.p.A.

Bild: Opto Engineering S.p.A.Bild: Opto Engineering S.p.A.
Inspection of 1mm smartphone threaded hole, M6 blind hole thread, 1mm diameter dental implant screw, 8mm rivet hole, 5mm marked metal hole of an automotive component (f.l.t.r.).

Bild: Opto Engineering S.p.A.Bild: Opto Engineering S.p.A.
Inspection of 1mm smartphone threaded hole, M6 blind hole thread, 1mm diameter dental implant screw, 8mm rivet hole, 5mm marked metal hole of an automotive component (f.l.t.r.).

Bild: Opto Engineering S.p.A.Bild: Opto Engineering S.p.A.
Inspection of 1mm smartphone threaded hole, M6 blind hole thread, 1mm diameter dental implant screw, 8mm rivet hole, 5mm marked metal hole of an automotive component (f.l.t.r.).

Key difficulties may include reduced accessibility, complicated lighting, limited FoV, complex integration in inline vision systems. Indeed, small size and depth of inspected holes can prevent standard imaging solutions from capturing adequate images of defects. Conventional optics do not provide a clear and uniform view of the internal walls of holes. In addition, light distribution within narrow cavities can be problematic, causing unwanted shadows and reflec-tions and issues in illuminating fea-tures of interest. These challenges often lead to manual sampling inspections or the adoption of unoptimized imaging solutions that can hinder inspection and high-speed requirements.

Opto Engineering S.p.A.

Dieser Artikel erschien in inVISION 2 (April) 2025 - 15.04.25.
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