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      Please tell me how to include the effective focal length (EFL) in the error function as referred in OSLO 5.4 Optics Reference Chapter 7, Page 266 (A design project)?

      Synopsis

      Including the effective focal length in the error function

      Solution

      In rev 5.4, the focal length is not explicitly included as an operand. However, there are at least three ways to include the focal length in the error function.
      1. If the object is at infinity, the focal length is controlled by the value of PU, since the entrance beam radius is fixed. Therefore, you can use PU = EBR/EFL to find the proper target for PU.
      2. The PWR operand (only available in Standard & Premium) is 1/EFL and can be used to include the focal length.
      3. You can calculate the focal length using the pxc command and pick up the focal length out of the spreadsheet buffer.
      The EFL is explicitly included as an operand in OSLO 6.1+ Standard and Premium(not available in OSLO LT/Light)