Linear image sensor with triangular pixel geometry specialized for the light section method

We propose a linear image sensor specialized for the light section method to achieve high-speed and low-latency height measurement. This linear image sensor has pixels in the shape of triangles pointing upward and downward, which allows fast data readout and simple data processing of the cross-sectional profile acquisition. We have confirmed the basic feasibility of the sensor by numerical simulation. We also fabricated a prototype of the proposed sensor with 508 pixels. We conducted height measurement of the vertical translate stage and the step pyramid-shaped object and confirmed that the proposed sensor functions as a sensor for light section method.