Abstract: Apparatus for determining the relative distance or depth to an object. A light source projects light at an object whose distance is to be determined. A lenticular prismatic screen responds to light reflected from the object and generates two distinct images thereof. Imaging optics focuses the two images generated by the lenticular prismatic screen onto a sensor which detects and digitizes the images. A computer is coupled to the sensor that determines the separation between the two images, which separation is indicative of the distance to or depth of the object. The computer may also compute the centroid of each of the images to more accurately determine the separation between them, and hence the distance to the object. The lenticular screen may use prismatic surfaces that are essentially equilateral triangles, or constant angle prisms across the material.