Testing requirements

Gush arenaceous metal mobile phone shell arc surface edge detection precision defects.

The difficulty of the project

Ordinary camera depth of field cannot meet the circular arc surface one-time perfect focus, the entire surface normal lens can't grain to tiny flaw texture under the sand.

The solution

Use BT series double telecentric lens.

Application advantages

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

The depth of field is big, can be one-time perfect focus of different distance of the surface of the parts, general depth of field for the normal lens Ten times the level.

Application development

For after sandblasting surface treatment, such as the surface of the metal shell, to extract the shell surface scratches, stains, miscellaneous ，High quality, corrosion and other defects, need double telecentric lens to achieve the transfer function, for is not in the same plane（steps, etc.), can realize a perfect figure.

Author：BTOS Editor