confocal op• Data kinds: table × table → table
• Call: import fullseye as fs; fs.ledger.chromatic_confocal_readout(peaks, probe, layer_material=None) -> 'dict' (to call the implementation directly, import chromconf; chromconf.chromatic_confocal_readout(peaks, probe, layer_material=None) -> 'dict'; from the registry, opsoptics.get("chromatic_confocal_readout"))
Map peak wavelengths back to heights (z) through the calibration table and, for two peaks, give the thickness of the transparent layer.
> The detailed description below is the original text — the summary and the headings are translated.
peaks: chromatic_confocal_peaks の返り値(dict の列)か、波長 [nm] の列。
probe: chromatic_confocal_probe の dict。z は較正表を 3 次スプラインで逆引き(単調なので一意)。
layer_material: 上の 2 ピークのあいだの層の材料(材料表の名前か屈折率の数)。与えると厚さを返す:
• thickness_paraxial_um = n(λ₂) × (z₂ − z₁) —— 見かけの厚さ × 屈折率(近軸)。λ₂ は下の面のピーク波長(下の面に焦点を結んでいるのはこの色なので、群屈折率でなく位相屈折率)。
• thickness_um = n(λ₂)(z₂ − z₁) / (1 − g/2)、g = 1/n − cos α/√(n² − sin²α)(平板が足す縦球面収差を厚さあたりで、応答のピークがその半分だけ深くずれる分を戻す。NA は λ₂ の較正の NA)。
返り値: heights_um(各ピークの z、遠いほど大)/ wavelengths_nm / 層を指定したとき apparent_thickness_um / n_layer / na / thickness_paraxial_um / thickness_um。Raises ValueError: 空のピーク列、較正の帯域の外の波長、層を指定したのにピークが 2 本でない(薄すぎる膜は 1 本に潰れる —— 厚さを当て推量しない)。
Every optics op validates its input before computing (nothing slips through silently):
• Units are baked into the argument name — _mm / _um / _deg / _mrad. Confusing mm with µm does not crash; it yields a plausible-looking wrong answer, so the name prevents it. Nothing here guesses the unit from the magnitude.
• Strings raise ValueError — float('50') succeeds, so an unparsed configuration value would slip through as a length (measured: thin_lens('50', '200') returned a plausible 66.667 mm). bool is refused too, as the implicit promotion True == 1.
• complex / masked arrays raise ValueError (real-valued slots only; silently dropping the imaginary part or peeling off the mask is refused). NaN/Inf raises ValueError on every input.
• Division by zero and its relatives are refused by name: focal length 0, radius of curvature 0, refractive index <= 0, a fully opaque aperture (all zeros, so the normalisation is 0/0), a PSF whose sum is <= 0, a Stokes vector with S0 = 0, and an object sitting at the front focal point (the image is at infinity).
• Only two ops return a non-finite value, and both state it as a contract: depth_of_field returns far_mm = inf beyond the hyperfocal distance (that is what the hyperfocal distance means), and gaussian_beam returns wavefront_radius_mm = inf at the waist (the radius of curvature of a plane wavefront). Both also return a finite companion (far_is_infinite / curvature_per_mm). Any other silent NaN/Inf is detected internally and raises ValueError — "float64 overflowed" and "the answer is infinite" are different claims, so the first is never returned wearing the face of the second.
• Size caps: generated grids are capped by optics.MAX_GRID (4096); supplied fields/PSFs/apertures by optics.MAX_FIELD_ELEMENTS (2^24); ABCD element chains by optics.MAX_SYSTEM_ELEMENTS (1024); Zernike by MAX_ZERNIKE_TERMS (512) / MAX_ZERNIKE_ORDER (40) / MAX_ZERNIKE_BASIS (2^25). This closes, fail-closed, the paths where a small argument triggers a huge internal allocation (measured: n_max=40 × 4096² needs 108 GB).
• Physically impossible states are refused too: a Stokes vector with degree of polarisation > 1, negative transmittance, negative intensity, and invalid Zernike indices such as n-|m| odd.
• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).
• Operator provenance and references — the sources of the research/methods this op family came from.
• The canonical algorithm (author, year) and its uses are named in the family usage guide above.
• poc_chromatic_confocal — py -3.11 examples/poc_chromatic_confocal.py
table as input)abcd_matrix · wavefront_stats · sfr_from_edge · paraxial_trace · seidel_coefficients · spot_stats · tolerance_analysis · wavefront_from_opd
confocal)chromatic_confocal_probe · confocal_axial_response · chromatic_confocal_spectrum · chromatic_confocal_peaks · chromatic_confocal_limits
*Provenance: chromconf.py — OPTICS operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.