opticalSystem:
  type: CompoundOptic
  name: apo1
  inMedium: 1.0
  medium: 1.0
  dist: 1
  pupilSize: 0.6
  pupilObscuration: 0.0
  items:
    -
      type: Lens
      name: L1
      medium: &NLAK10
        type: SellmeierMedium
        B1: 1.72878017
        B2: 0.169257825
        B3: 1.19386956
        C1: 0.00886014635
        C2: 0.0363416509
        C3: 82.9009069
      items:
        -
          type: RefractiveInterface
          name: L1_entrance
          surface:
            type: Sphere
            R: -0.241321
          obscuration:
            type: ClearCircle
            radius: 0.042
        -
          type: RefractiveInterface
          name: L1_exit
          surface:
            type: Sphere
            R: -0.126269
          coordSys:
            z: -0.005
          obscuration:
            type: ClearCircle
            radius: 0.04
    -
      type: Lens
      name: L2
      medium: &PFK85
        type: SumitaMedium
        A0: 2.1858326
        A1: -0.0050155632
        A2: 0.0075107775
        A3: 0.00017770562
        A4: -1.2164148e-05
        A5: 6.1341005e-07
      coordSys:
        z: -0.013417
      items:
        -
          type: RefractiveInterface
          name: L2_entrance
          surface:
            type: Sphere
            R: -0.126269
          obscuration:
            type: ClearCircle
            radius: 0.041
        -
          type: RefractiveInterface
          name: L2_exit
          surface:
            type: Sphere
            R: 0.970519
          coordSys:
            z: -0.012
          obscuration:
            type: ClearCircle
            radius: 0.041
    -
      type: Lens
      name: L3
      medium: &BK7
        type: SellmeierMedium
        B1: 1.03961212
        B2: 0.231792344
        B3: 1.01046945
        C1: 0.00600069867
        C2: 0.0200179144
        C3: 103.560653
      coordSys:
        z: -0.575115
      items:
        -
          type: RefractiveInterface
          name: L3_entrance
          surface:
            type: Sphere
            R: 0.040884
          obscuration:
            type: ClearCircle
            radius: 0.012
        -
          type: RefractiveInterface
          name: L3_exit
          surface:
            type: Sphere
            R: 0.043957
          coordSys:
            z: -0.003
          obscuration:
            type: ClearCircle
            radius: 0.014
    -
      type: Detector
      name: Detector
      surface:
        type: Plane
      coordSys:
        # z: -0.605115
        z: -0.608115
        # z: -0.608035  # found this empirically for on-axis rays
      obscuration:
        type: ClearCircle
        radius: 0.012
