{
  "schema_version": "emberscope-rfs-063-comparison.v1",
  "run_date": "2026-07-26",
  "status": "preliminary bounded negative result",
  "target": {
    "key": "fine_gsd_100",
    "efl_mm": 100.0,
    "f_number": 1.8,
    "entrance_aperture_mm": 55.56,
    "full_field_x_deg": 6.23,
    "full_field_y_deg": 4.98
  },
  "architectures": [
    {
      "architecture": "4-mirror",
      "mirror_count": 4,
      "target_key": "fine_gsd_100",
      "target_efl_mm": 100.0,
      "target_f_number": 1.8,
      "entrance_aperture_mm": 55.56,
      "full_field_x_deg": 6.23,
      "full_field_y_deg": 4.98,
      "measured_efl_mm": 94.14221563720149,
      "efl_error_percent": 5.857784362798513,
      "minimum_acceptance_throughput": 0.11764705882352941,
      "dense_field_rms_min_um": 1060.3492814501267,
      "dense_field_rms_max_um": 6027.685820023414,
      "maximum_2x2_energy": 0.0,
      "maximum_16x16_energy": 0.0,
      "flat_image_focus_spread_um": 26686.550789102366,
      "envelope_max_mm": 170.48835840364274,
      "mass_proxy_kg": 0.4064144002964981,
      "merit": 7726.978910152348,
      "acceptance_verdict": "fail",
      "failed_gates": [
        "plate_scale_efl",
        "no_vignetting",
        "physical_clearance_model",
        "detector_plane_rms",
        "flat_image",
        "package_span"
      ],
      "optimization_budget": {
        "geometry": 400,
        "freeform": 400,
        "freeform_polish": 200,
        "stage_a_de_evaluations": 748,
        "stage_a_polish_evaluations": 150,
        "stage_b_recorded_evaluations": 220
      }
    },
    {
      "architecture": "5-mirror",
      "mirror_count": 5,
      "target_key": "fine_gsd_100",
      "target_efl_mm": 100.0,
      "target_f_number": 1.8,
      "entrance_aperture_mm": 55.56,
      "full_field_x_deg": 6.23,
      "full_field_y_deg": 4.98,
      "measured_efl_mm": 66.6332503786908,
      "efl_error_percent": 33.3667496213092,
      "minimum_acceptance_throughput": 0.0,
      "dense_field_rms_min_um": 3659.456592127426,
      "dense_field_rms_max_um": 11298.766230667392,
      "maximum_2x2_energy": 0.0,
      "maximum_16x16_energy": 0.0,
      "flat_image_focus_spread_um": null,
      "envelope_max_mm": 195.66042704917817,
      "mass_proxy_kg": 0.4515448420783701,
      "merit": 19490.79890962153,
      "acceptance_verdict": "fail",
      "failed_gates": [
        "plate_scale_efl",
        "no_vignetting",
        "physical_clearance_model",
        "detector_plane_metrics_reported",
        "detector_plane_rms",
        "chief_ray_angle_reporting",
        "package_span"
      ],
      "optimization_budget": {
        "geometry": 400,
        "freeform": 400,
        "freeform_polish": 200,
        "stage_a_de_evaluations": 924,
        "stage_a_polish_evaluations": 150,
        "stage_b_recorded_evaluations": 214
      }
    },
    {
      "architecture": "6-mirror",
      "mirror_count": 6,
      "target_key": "fine_gsd_100",
      "target_efl_mm": 100.0,
      "target_f_number": 1.8,
      "entrance_aperture_mm": 55.56,
      "full_field_x_deg": 6.23,
      "full_field_y_deg": 4.98,
      "measured_efl_mm": 36.50938543870437,
      "efl_error_percent": 63.49061456129563,
      "minimum_acceptance_throughput": 0.0,
      "dense_field_rms_min_um": 11247.786862341258,
      "dense_field_rms_max_um": 18086.87852602254,
      "maximum_2x2_energy": 0.0,
      "maximum_16x16_energy": 0.0,
      "flat_image_focus_spread_um": null,
      "envelope_max_mm": 137.50957882262054,
      "mass_proxy_kg": 0.48216094685528277,
      "merit": 30173.888944480812,
      "acceptance_verdict": "fail",
      "failed_gates": [
        "plate_scale_efl",
        "no_vignetting",
        "physical_clearance_model",
        "detector_plane_metrics_reported",
        "detector_plane_rms",
        "chief_ray_angle_reporting",
        "flat_image"
      ],
      "optimization_budget": {
        "geometry": 400,
        "freeform": 400,
        "freeform_polish": 200,
        "stage_a_de_evaluations": 1100,
        "stage_a_polish_evaluations": 150,
        "stage_b_recorded_evaluations": 214
      }
    }
  ],
  "finding": "None of the three bounded optimized families passes the common gates. The four-mirror row remains closest on plate scale and is the only row with non-zero minimum acceptance throughput. The six-mirror dual-triplet row closes package span at 137.5 mm and mass at 0.482 kg, but measures only 36.5 mm EFL and 0.0% minimum throughput; the four-mirror row remains at 94.1 mm EFL and 11.8% minimum throughput.",
  "scope_limit": "This is a deterministic negative result for the recorded start families and budgets, not proof that every possible four-, five-, or six-mirror architecture is infeasible.",
  "next_task": "RFS-064 seven-mirror cold-stop-relay optimization at the identical target and gates"
}