Testing requirements

Charger surface character printing defect.

The difficulty of the project

Charger shell generally finish on surface, high reflective surface.The reason why we unable to extract characters characteristics of high contrast is general lens easily affected by stray light when shooting the measuring surface characters.And light must be strictly controlled when shooting the effect of outside.

The solution

Use BT series double telecentric lens.

Apppcation advantages

1、High heart, far from heart is less than 0.1%, which is the core of the double telecentric lens,and can completely avoid the incident light Angle is big light interference problems caused by the outside world.

2、High resolution, even with small pixel image sensor can also generate high resolution images, CFT is (the contrast transfer function) 70 lp/mm > 30%;

Apppcation development

High smooth finish or high reflective surfaces, or other features to detect the surface printing defects,in order to avoid stray light in the surface reflective effect,in order to under the bad environment without control of extraction of defect features of high precision.

Author：BTOS Editor