cavity op• Data kinds: none → pairs (an op determined by its arguments alone — it takes no image or data input)
• Call: import fullseye as fs; fs.ledger.cavity_strain_transfer(length_m: 'float' = 3994.5, finesse: 'float' = 445.0, f_min_hz: 'float' = 1.0, f_max_hz: 'float' = 100000.0, n_points: 'int' = 512) -> 'np.ndarray' (to call the implementation directly, import cavityoptics; cavityoptics.cavity_strain_transfer(length_m: 'float' = 3994.5, finesse: 'float' = 445.0, f_min_hz: 'float' = 1.0, f_max_hz: 'float' = 100000.0, n_points: 'int' = 512) -> 'np.ndarray'; from the registry, opsoptics.get("cavity_strain_transfer"))
Magnitude |H(f)| of the arm-cavity transfer function from strain h(f) to output phase (pairs).
> The detailed description below is the original text — the summary and the headings are translated.
length_m : float
腕の長さ L [m]。
finesse : float
フィネス F(fabry_perot_response の値を渡す)。
f_min_hz, f_max_hz : float
周波数の範囲(対数等間隔)。
n_points : int
点数。
numpy.ndarray
(n_points, 2): 列 0 = 周波数 [Hz]、列 1 = |H| = (2F/π)·|sinc(2πfL/c)|/√(1 + (f/f_p)²)、
f_p = c/(4FL)(共振器の極)。DC で 2F/π(単純 Michelson の往復回数倍)。
sinc は往復伝搬の間にひずみが振動して打ち消す効果(f = c/2L の FSR で零)。
門: f = f_p で DC の 1/√2(sinc の寄与は 1e-6 以下)、f = FSR で零。
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_gw_detector_pseudo_simulation — py -3.11 examples/poc_gw_detector_pseudo_simulation.py
pairs as input)mtf50 · energy_to_photons · spectral_product · spectral_integral · spectral_stats · kubelka_munk_reflectance · hyperspectral_capture · film_thickness_fft
cavity)fabry_perot_response · michelson_dc_readout · pdh_error_signal · quantum_noise_budget
*Provenance: cavityoptics.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.