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Text File  |  1993-10-17  |  2KB  |  17 lines

  1. "AST1CAL3 EQUATION VARIABLE","10-17-1993","13:04:03"
  2. "OBJECT_DISTANCE=F[O]+(1-SIGN(ABS(F[O])))*N[1]*R/((N[2]-N[1])+1E-30) IMAGE_DISTANCE=1/1E-30 INDEX_1=N[1]+(1-SIGN(ABS(N[1])))*N[2]*F[O]/(F[O]+R+1E-30) INDEX_2=N[2]+(1-SIGN(ABS(N[2])))*N[1]/(F[O]+1E-30)*(F[O]+R) RADIUS=R+(1-SIGN(ABS(R)))*(N[2]-N[1])*F[O]/(N[1]+1E-30)"
  3. "SPHERICAL REFRACTING SURFACES, OBJECT FOCAL LENGTH.            A diagram of the Problem is shown below. Surface is represented by 's'.                                 s                                                                         A · o· · · · · >∞     F = object focus       N[1] = index              L[O]  ·    s  ·    L[I]        V = vertex of sphere          outside    F    .            s   R·               P = image at ∞         N[2] = index        ·· · · · · · ·o· · · o              L[O] = distance F to sphere   inside                     V|s    C               L[I] = ∞                                         N[1]     | s      N[2]         F[O] = distance S to vertex                               |   s                 F[I] = ∞                                   |----F[O]------|------F[I]---->∞     C = center of sphere  R = radius curvat.                                               (c) Copyright PCSCC, Inc., 1993  Sign Convention:  F[O] + means its left of vertex V                                               F[I] = ∞ is always to right of vertex V                                         R    + means center C is right of V                           *** Answer(s) to problem ***                                                    Variables are set to proper values at entry.  Note, value of unknown should be  set to 0.0.  Enter any 3 of 4 knowns, program calculates missing (=0) one.      F[O] = 13.6. Image is real and to right of V.  Type any key to exit.                           ||An interface separates air on the left and glass (Ng=1.44) on  the right. (a) What is the object focal length if its radius of curvature is 6  cm?                                                                                  Type comma key to see answer. Type (F2) to return to application file."
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