Detection of anomalies in translucent material by candling

Details Detection of anomalies in translucent material by candling Detection of anomalies in translucent material by candling

G - Physics

01

N

240/88

G01N 21/89 (2006.01) G01N 33/12 (2006.01)

Patent

CA 1319134

- 1 - Abstract A candling method for detecting anomalies in translucent material, e.g. parasites in fish fillets, comprises directing an illumination beam of light through the material. It has been discovered that improved results in terms of more reliable detection of anomalies, and the ability to locate such anomalies in thicker samples than has previously been possible, can be obtained by using a beam with a radius no greater than 1 mm and preferably no greater than 0.5 mm. For still better results the beam radius can be reduced to a value no greater than 0.1 mm, and even down to 0.05 mm.

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