"ASPHERICAL REFRACTING SURFACES, CARTESIAN OVOID. A diagram of the Problem is shown below. Surface is represented by 's'. A s · o· S = source N[1] = index L[O] · s · L[I] V = vertex of ovoid outside S . s · P = image N[2] = index ·· · · · · · ·o· · · · · · ·o P L[O] = distance S to ovoid inside V|s | L[I] = distance ovoid to P N[1] | s N[2] | S[O] = distance S to vertex | s | S[I] = distance vertex to image |----S[O]------|----S[I]-----| (c) Copyright PCSCC, Inc., 1993 *** Answer(s) to problem *** Variables are set to proper values at entry. L[0] is the equation which can be written as L[O] * N[1] + L[I] * N[2] = CONSTANT = 34.5. (a) L[O] = -155.5 and (b) negative distance implies image P is not within ovoid and is not allowed! Type any key to exit. ||Write an expression for the Cartesian ovoid with image and object distances of 15 and 12 cm, respectively. Ovoid made of glass Ng=1.5 and surrounded by air Na=1. (a) Calculate the ray length from ovoid surface to its image if that point is 14 cm from the source object. (b) What does a negative distance mean? Type comma key to see answer. Type (F2) to return to application file."
