Autofocus technology is the core foundation for industrial cameras to achieve high-precision visual inspection. The mainstream autofocus solutions are outlined below:

It analyzes contrast fluctuations on image edges and drives the lens elements to the position with maximum contrast value.This algorithm features simple logic and low hardware cost. However, it responds sluggishly to low-contrast targets, so it is mostly applied to static or low-speed operating scenarios.

Dedicated photodiodes on the image sensor capture phase differences of incoming light, directly calculating the offset distance and direction of defocus.Boasting ultra-fast focusing speed and superior accuracy, it perfectly matches dynamic shooting demands on high-speed production assembly lines.

A laser beam is emitted, and the reflected signal is received to calculate the precise distance to the target object for instant focusing.This method is unaffected by surface textures of workpieces, performing reliably in dim light or low-contrast working conditions.

Combining two or more focusing technologies, hybrid autofocus balances rapid response and stable performance, and has become the mainstream development direction for high-end industrial vision cameras.Model selection requires comprehensive evaluation based on inspection speed, precision requirements and on-site environmental factors.