Testing requirements

To test whether ceramic filter element inner hole plug.

the difficulty of the Project

Ordinary lens, because of the light Angle Angle is big, the light into the ceramic filter element inner hole will continue Shoot, finally completely absorbed by the filter body off, unable to enter inside the lens.The result and the filter itself image was taken from the inner hole plugging effect, unable to distinguish, and cannot be detected.

The solution

Use BT series double telecentric lens.

Application advantages

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

The depth of field is big, can be one-time perfect focus of different distance of the surface of the parts, average depth of field to ten times the normal lens.

Application development

For the object height gap is larger, detection of bore hole condition.Avoid the general lens angle loss caused by the light refraction of light, avoid cannot focus clearly caused by general lens small depth of field.

Author：BTOS Editor