A vision system comprising: a housing, a lid, a PCB, a processing Unit, an Image sensor, a connector, and/or an optical (lens) module; the optical module comprising an attachment portion for external device.The attachment portion could be anything to keep and hold the external testing equipment such as laser projectors (crosshair laser) for testing. It should have easy attach and detach feature. Preferably, it has locking feature for centering or locking (fig 3 and fig 4).
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