watermedia opなし → table(引数だけで決まる op —— 画像やデータの入力を取らない)import fullseye as fs; fs.ledger.cylinder_lens_caustic(radius_mm, n_glass, n_fill=1.0, thickness_wall_mm=0.0, n_rays=41) -> 'dict' (実装を直接呼ぶなら import watermedia; watermedia.cylinder_lens_caustic(radius_mm, n_glass, n_fill=1.0, thickness_wall_mm=0.0, n_rays=41) -> 'dict'、台帳から引くなら opsoptics.get("cylinder_lens_caustic"))The paraxial focus and the real-ray caustic of a cylinder (a rod or a bottle) in a collimated beam -> dict.
thickness_wall_mm = 0 is a solid rod of index n_glass and outer radius radius_mm; thickness_wall_mm > 0 is a hollow
tube of that wall thickness filled with a medium of index n_fill (1.0 = empty, 1.333 = water). The light travels along +z
across the axis (at the origin) and is bent in the plane of the section. The paraxial focus comes from the 2x2 ray-transfer
matrix of the surfaces (efl = -1/C, back focal distance -A/C); for a solid rod it is the closed form
f = n R / (2 (n - 1)) measured from the axis, and for a thin-walled tube filled with n_fill the two-interface limit
n_fill R / (2 (n_fill - 1)). The real rays are traced surface by surface with the exact vector form of Snell’s law
at parallel heights from the axis up to 95 % of the clear aperture (the rod, or the fill); focus_z_mm is where each leaves
the cylinder and crosses the axis (distance from the axis, NaN if it does not cross), caustic_z_mm / caustic_y_mm the
envelope of neighbouring exit rays. The marginal focus (the highest ray that leaves the cylinder before it crosses the axis) is shorter than the paraxial one (positive spherical aberration).
The table also has paraxial_focus_mm (from the axis), efl_mm, power_per_mm (C; an empty thin tube has almost none),
efl_closed_form_mm, marginal_focus_mm, longitudinal_aberration_mm, heights_mm, paths_z_mm / paths_y_mm (the ray
points from the start to the exit) and exit_dir_z / exit_dir_y. n_glass <= 1, n_fill < 1 and a wall as thick as the
radius are refused.
optics の全 op は入力を検証してから計算する(黙って通さない):
_mm / _um / _deg / _mrad。mm と µm の取り違えは crash ではなく「もっともらしく間違った答え」なので、名前で防ぐ。大きさから単位を推測する処理は一切しない。ValueError — float('50') は成功してしまうため、未パースの設定値が長さとして通り抜ける(実測: thin_lens('50', '200') がもっともらしい 66.667 mm を返していた)。bool も True == 1 の暗黙昇格として拒否。ValueError(実数枠のみ。虚部の無言切り捨て・マスク剥がしを拒否)。NaN/Inf は全入力で ValueError。depth_of_field の過焦点距離以遠の far_mm = inf(それが過焦点距離の定義)と gaussian_beam のウエストでの wavefront_radius_mm = inf(平面波面の曲率半径)。どちらも有限の相棒(far_is_infinite / curvature_per_mm)を併せて返す。それ以外の無言 NaN/Inf は内部で検出して ValueError —「float64 が溢れた」と「答えが無限大」は別の主張なので、後者の顔で前者を返さない。optics.MAX_GRID(4096)、供給された場/PSF/開口は optics.MAX_FIELD_ELEMENTS(2^24)、ABCD 素子列は optics.MAX_SYSTEM_ELEMENTS(1024)、Zernike は MAX_ZERNIKE_TERMS(512)/ MAX_ZERNIKE_ORDER(40)/ MAX_ZERNIKE_BASIS(2^25)。小さな引数から巨大な内部確保が起きる経路(実測: n_max=40 × 4096² で 108 GB)を fail-closed で塞ぐ。| 物理的に不可能な状態も拒否: 偏光度 > 1 の Stokes ベクトル、負の透過率、負の強度、n- | m | が奇数などの不正な Zernike 添字。 |
py -3.11 examples/poc_water_transparent_media.pytable を入力に取れる)abcd_matrix · wavefront_stats · sfr_from_edge · paraxial_trace · seidel_coefficients · spot_stats · tolerance_analysis · wavefront_from_opd
watermedia)ocean_spectrum · ocean_height_field · fresnel_water_air · snell_window · refracted_view · water_attenuation · underwater_image · phase_function_hg
Provenance: watermedia.py — OPTICS operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.