Patent ID: 6141147
Filing Date: 2000-10-31
Classification: B23Q,B27C,G01B,Y10T

Abstract:
An optical unit for projecting an image, the optical unit comprising:a first side disposed adjacent the image;a second side disposed at a first angle with respect to said first side;a third side disposed at a second angle with respect to said first side, said first side, second side and third side defining a triangular structure where each of the first side, second side and third side have different lengths;a first locating line extending transversely across said third side; anda second locating line extending transversely across said first side, said second locating line being positioned on the optical unit relative to said first locating line such that said first and second locating lines appear co-linear when viewed from a third angle relative to said first side, wherein the first and second locating lines are viewed at the third angle along a direct line of sight to view the image.