{
  "package": "emberscope-rfs-optical-evaluation-stack",
  "date": "2026-05-30",
  "scope": "RFS-025 first standard optical evaluation applied to current mirror-shape candidates",
  "stack_definition": [
    {
      "check": "spot",
      "recorded": "centroided geometric RMS, EE80, EE95, spot pixels, and existing spot diagrams"
    },
    {
      "check": "ray fan",
      "recorded": "edge-field ray-fan residual slopes and generated SVG comparison"
    },
    {
      "check": "wavefront",
      "recorded": "RMS/PV/Zernike-labelled proxies from ray residuals; true OPD tracing remains a follow-on"
    },
    {
      "check": "PSF and MTF",
      "recorded": "Gaussian PSF/MTF proxy at 0.25 and 0.50 detector Nyquist for 8, 10, 12, and 14 um"
    },
    {
      "check": "pixel energy and SNR",
      "recorded": "1x1, 2x2, and 4x4 detector-pixel ensquared energy and small-hot-target SNR factor"
    },
    {
      "check": "vignetting",
      "recorded": "aperture-valid ray fraction by candidate and field"
    },
    {
      "check": "stray light and ghosts",
      "recorded": "explicit open analysis boundary because current sequential trace has no non-sequential ghost model"
    },
    {
      "check": "tolerance and thermal",
      "recorded": "deterministic perturbation yield plus +/- 50 um focus-shift yield proxy"
    },
    {
      "check": "manufacturing, alignment, packaging",
      "recorded": "surface-family limit, alignment sensitivity text, envelope, mass proxy, and payload fit"
    },
    {
      "check": "merit weights",
      "recorded": "optical quality, throughput, pixel energy, tolerance, manufacturing, package, and SNR factors"
    }
  ],
  "mission_references": {
    "pixel_pitch_um": 17.0,
    "field_points_deg": [
      0.0,
      0.75,
      1.5
    ],
    "wavelengths_um": [
      8.0,
      10.0,
      12.0,
      14.0
    ],
    "thermal_cases_c": [
      -10.0,
      25.0,
      45.0
    ],
    "optical_transmission_proxy": 0.7716374999999999
  },
  "summaries": [
    {
      "variant": "spherical",
      "shape_family": "spherical",
      "edge_rms_spot_um": 6408.8070915421295,
      "edge_ee80_radius_um": 7972.282059533857,
      "edge_ensquared_2px_fraction": 0.0,
      "edge_mtf_0_50_nyquist_proxy": 0.0,
      "edge_snr_factor": 0.0,
      "edge_vignetting_fraction": 0.37962962962962965,
      "tolerance_yield_proxy": 0.0,
      "thermal_focus_yield_proxy": 0.0,
      "envelope_max_mm": 65.52500878809843,
      "mass_proxy_kg": 0.3238494006297269,
      "alignment_sensitivity": "High: first tolerance proxy rejects more than half of perturbations.",
      "manufacturability_limit": "Simplest surface family, but optical performance still drives redesign.",
      "readiness": "Needs maturation: image energy is too spread for the detector proxy."
    },
    {
      "variant": "conic",
      "shape_family": "conic",
      "edge_rms_spot_um": 6236.680755837797,
      "edge_ee80_radius_um": 7740.518792158099,
      "edge_ensquared_2px_fraction": 0.0,
      "edge_mtf_0_50_nyquist_proxy": 0.0,
      "edge_snr_factor": 0.0,
      "edge_vignetting_fraction": 0.37962962962962965,
      "tolerance_yield_proxy": 0.0,
      "thermal_focus_yield_proxy": 0.0,
      "envelope_max_mm": 65.52683641097606,
      "mass_proxy_kg": 0.3238494006297269,
      "alignment_sensitivity": "High: first tolerance proxy rejects more than half of perturbations.",
      "manufacturability_limit": "Conic or low-departure surfaces need vendor tolerance and slope review.",
      "readiness": "Needs maturation: image energy is too spread for the detector proxy."
    },
    {
      "variant": "starter_freeform",
      "shape_family": "starter freeform",
      "edge_rms_spot_um": 3788.0041579066847,
      "edge_ee80_radius_um": 4619.279469879796,
      "edge_ensquared_2px_fraction": 0.0,
      "edge_mtf_0_50_nyquist_proxy": 0.0,
      "edge_snr_factor": 0.0,
      "edge_vignetting_fraction": 0.37962962962962965,
      "tolerance_yield_proxy": 0.0,
      "thermal_focus_yield_proxy": 0.0,
      "envelope_max_mm": 65.7597028411242,
      "mass_proxy_kg": 0.3238494006297269,
      "alignment_sensitivity": "High: first tolerance proxy rejects more than half of perturbations.",
      "manufacturability_limit": "Freeform departure reaches 9051 um; diamond-turning review needed.",
      "readiness": "Needs maturation: image energy is too spread for the detector proxy."
    }
  ],
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