optics op• Data kinds: measurement → measurement
• Call: import fullseye as fs; fs.ledger.fresnel_reflectance(cos_i, eta1=1.0, eta2=1.5) (to call the implementation directly, import match3d; match3d.fresnel_reflectance(cos_i, eta1=1.0, eta2=1.5); from the registry, ops3d.get("fresnel_reflectance"))
Fresnel reflectance (unpolarised = the s/p average). The share that splits into reflection and transmission at a transparent interface.
> The detailed description below is the original text — the summary and the headings are translated.
垂直入射で ((n1−n2)/(n1+n2))²(air→glass=0.04)。臨界角超で 1.0(全反射)。透明体レンダ/検査に。
`cos_i は入射角の余弦(実数スカラー。配列・None は ValueError)。符号は捨てる(|cos_i|`)。
`eta1 は入射側、eta2 は透過側の屈折率。s 偏光 rs と p 偏光 rp` の平均を float で
返す([0, 1])。Brewster 角では `rp = 0 になるが平均は 0 にならない。cos_i = 0`(かすめ
入射)で 1.0。透過率は `1 −` 反射率(吸収なし)。
用途: `refract` で曲げた光線の重み、透明体の輝度予測。
• 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.
• snell_refraction — py -3.11 examples_3d/snell_refraction.py
measurement as input)vol_gaussian_psf · fuse_to_voxel · snell_angle
optics)reflect · refract · normal_from_reflection · snell_angle
*Provenance: match3d.py — 3D 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.