LAC (Laser Autocollimator) is a non-contact instrument for small angle measurement with monochromatic laser as light source. It uses the excellent orientation inherent in laser and the characteristics of small light spot to testing the straightness, flatness, angle precision, and parallelism, especially for small area products measurement.
The working principle is shown in the figure below, is to use a collimated laser beam irradiation of the target measured surface, after reflection imaging in high-precision CCD. The measuring software calculates the angle between the reflection angle and the reference plane and displays it directly. Different apertures can be selected to change the size of the detection spot to accommodate the detection of small area products (up to a minimum of 1mm) . For the multi-faces reflection, the software can measure the angle value of many imaging points on the screen, especially suitable for the precise positioning of many optical plane surfaces assembly and inspection.
- Angle/Perpendicular/Parallelism Measurement
- Windows assembly inspection
- Wafer packaging Positioning
- Lens shift/Titling monitor
- Vibration or rotation stability monitoring
- Voice Coil Motor inspection