{
  "task": "RFS-109",
  "run_date": "2026-09-08",
  "status": "preliminary response diagnostic; no acceptance promotion",
  "source_hashes": {
    "projects/rural-fire-service-camera/scripts/rfs_physical_plane_response_scan.py": "8c210a77a7702e6f65d519f6814132c9bf9d9ffa9ee11d752703a1a6bf8bf9bc",
    "projects/rural-fire-service-camera/scripts/rfs_imaging_known_case_check.py": "8b64d44ca7bb93515583eda052d3cfaa51bb1ed8bf8e573f3d47b107087858e3",
    "projects/rural-fire-service-camera/scripts/rfs_three_mirror_nonplanar_detector_pose_correction.py": "90229e34bf014c514f8b0e4ee9d0e5280162aa5498a6ae0f631364db0b86fb1f",
    "projects/rural-fire-service-camera/scripts/rfs_three_mirror_nonplanar_start.py": "e935088b853a5c4089baefea12c3ed9a076f26702652f3c003e5345f825b0c14",
    "projects/rural-fire-service-camera/scripts/rfs_four_mirror_prescription_optimizer.py": "f9b388668fba0977d06c59796da50ad0787607652cabb095eb04416b36492e41",
    "projects/rural-fire-service-camera/scripts/rfs_mirror_shape_poc.py": "a3e0d88e2b36d7f5b7156db6b3bd4dc9b0ab5e5c3222b0d8a05e927ff787f5b5",
    "projects/rural-fire-service-camera/designs/emberscope-three-mirror-nonplanar-freeform-corrected-fine-gsd-100.v1.json": "a9289be224c00e120505775b567337209d383a3b25f4032f46e5283c355d6b4b",
    "telescope_explorer/src/focus.py": "776fd559517116e444adfb3feadc625181a6ac2739acc2c7d10d453761f545da",
    "telescope_explorer/src/raytrace.py": "c9ce673013fa142510cecc018846c83bdea189e3b93d881cbe2aabd8dd0a2533",
    "telescope_explorer/src/surfaces.py": "0d1bf495b49bc516d40edc9f22222ed4e42fd3f4491291584cbb94c9723509ce"
  },
  "focus_method": "physical_plane",
  "preserved_focus_offset_mm": 2.675667722,
  "scope": "17 cases: source and signed probes of three curvatures (1% magnitude), three conics (0.2), and two chief-ray spacings (1 mm). Mirror normals, clear apertures and freeforms stay fixed. Physical on-axis focus and mean-ray detector frame are recomputed; the source axial offset is retained. 13 fields with 17 equally weighted reserved rays; baseline and lowest-field-RMS screened trial are independently sampled on a 317-ray disk. Neither pupil is continuous-pupil clearance proof.",
  "interpretation": "Individual best parallel planes use each field's original surviving-ray mask and allow lateral recentering. They diagnose a lower bound on geometric blur, not a shared detector. Their downstream obstruction is not rechecked. These finite changes are a prescription response study, not a tolerance budget or an aberration-polynomial decomposition. EFL uses the diagnostic field fit, not historical acceptance sampling. Window, baffle, package-wall, diffraction, thermal and manufacturing closure remain open.",
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      "tilt_deg": 4.0,
      "radius_mm": -318.76330039870913,
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      "rnorm_mm": 35.0,
      "poly_basis": "XY",
      "poly_order": 4,
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      "max_total_sag_mm": 2.528137040740892
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    {
      "name": "M2_secondary",
      "position_mm": [
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      "tip_deg": -60.0,
      "tilt_deg": -6.0,
      "radius_mm": 2160.0324868886028,
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      "clear_aperture_mm": 76.98094497034063,
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      "poly_basis": "XY",
      "poly_order": 4,
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      "name": "M3_tertiary",
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      "tip_deg": 30.0,
      "tilt_deg": 3.0,
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      "conic": 1.37826792,
      "clear_aperture_mm": 51.42643816038774,
      "rnorm_mm": 35.0,
      "poly_basis": "XY",
      "poly_order": 4,
      "poly_coeffs_mm": [
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  "cases": [
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      "group": "baseline",
      "index": null,
      "delta": 0.0,
      "units": null,
      "screen_failures": [],
      "sensor": {
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        "normal": [
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        "y_axis": [
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        "width_mm": 10.88,
        "height_mm": 8.704
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      "metrics": {
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        "minimum_throughput": 1.0,
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        "launched_rays": 221,
        "contained_intercepts": 105,
        "aperture_surviving_rays": 221,
        "obstructed_after_aperture": 0,
        "measured_efl_mm": 99.43098325564631,
        "package_span_mm": 116.81484465170047
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          "label": "Center field",
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