finish op• Data kinds: none → table (an op determined by its arguments alone — it takes no image or data input)
• Call: import fullseye as fs; fs.ledger.finish_catalog() -> 'dict' (to call the implementation directly, import metalfinish; metalfinish.finish_catalog() -> 'dict'; from the registry, opsoptics.get("finish_catalog"))
Finish name → its default parameters (αx, αy, grain).
> The detailed description below is the original text — the summary and the headings are translated.
値は設計値であって実測の Ra ではない ―― そこは正直に。粗さの順序
(鏡面研磨 < ヘアライン < 交差目 < 梨地)が意味を持つ量。
引数は無い。返り値は `{仕上げ名: {"alpha_x", "alpha_y", "grain"}}` の dict で、
キーは `FINISHES = linear(ヘアライン)/ circular`(旋盤の同心目)/
`radial(放射目)/ crosshatch(交差目)/ random`(梨地・ブラスト)の 5 つ。
• `alpha_x`: 筋方向の異方性ローブ幅(無次元、Ward 型 BRDF の α)。
• `alpha_y: 筋と直交する方向のローブ幅。alpha_x > alpha_y` が「筋に沿って
ハイライトが伸びる」異方性で、`random` だけ等方(両方 0.16)。
• `grain`: 微小凹凸(法線の乱れ)の強さ、無次元。
• 返り値は内部表の複製なので、書き換えても以後の `scene_material` /
`finish_shade` には影響しない。
`scene_material(kind="conductor", finish=...) はここから alpha_x` /
`alpha_y を引いて材質に埋め、micro_normals / tangent_field` /
`finish_shade` が同じ名前で筋の向きとローブを作る。手元の Ra を反映したい
ときは、この表を参考に `scene_material の roughness_um` を別途与える
(そちらは Rq [µm] で鏡面割合が決まる)。
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.
• machined_metal_and_materials — py -3.11 examples/machined_metal_and_materials.py
table as input)abcd_matrix · wavefront_stats · paraxial_trace · seidel_coefficients · spot_stats · tolerance_analysis · wavefront_from_opd · spot_diagram
finish)tangent_field · micro_normals · blast_normals · finish_shade
*Provenance: metalfinish.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.