Auto Focus Module based on Optical Triangulation Principle| iCore

World-class machine vision researchers at iCORE have expertise in the areas of analogue circuit design, precision instrument optics, lightning design, and machine vision. By integrating technologies related to electrical, electronic, optical, precision control, FPGA, firmware, and software, they offer creative machine vision solutions. High-power LED strobe lighting is made possible by the LED light strobe controller that iCore provides. It generates and regulates the current pulses. Optical triangulation is the basis for iCore's real-time auto focus module.

FPGA-based real-time auto focus model using the principle of optical triangulation:

This is utilized in the automatic optical inspection (AOI) of a high magnification optical system that tracks the movement of the target item in real time and adjusts the optical picture to immediately discover flaws of 1 μm or less in semiconductor and display testing.

Auto focus function to focus automatically on optical triangulation:

Because of the short depth of field (DOF) with high magnification optical systems, altering the height of the object may cause it to go out of focus. The distance between the optical system and the target object is measured and maintained constant in real time by iCore.

Features of optical triangulation iFocus:

Optical triangulation is used by the iFocus auto focus module, where the AF camera records the displacement of the laser beam reflected off the target object. The AF camera's non-contact distance measuring sensor ensures homogeneous image quality throughout the image region in addition to high-speed and high-precision measurement. It also performs real-time motor control and computes changes in pixel lengths surrounding the focus spot. iFocus's module contains an FPGA, which allows it to quickly control the AF camera.

Applications:

Ø  FCPB Inspection

Ø  Review Inspection

Ø  Glass Inspection

Ø  Semiconductor wafer inspection

Ø  OLED, Micro LED inspection

If you are looking for optical triangulation in Korea, you can find it on iCORE

Click here to contact iCORE

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