jones_state — REPRCONV entry op

• Data kinds: none → jones (an op determined by its arguments alone — it takes no image or data input)

• Call: import fullseye as fs; fs.ledger.jones_state(azimuth_deg=0.0, ellipticity_deg=0.0, amplitude=1.0) (to call the implementation directly, import reprconv; reprconv.jones_state(azimuth_deg=0.0, ellipticity_deg=0.0, amplitude=1.0); from the registry, opsreprconv.get("jones_state"))

• GPU: none (CPU reference implementation only)

Usage

Polarisation azimuth and ellipticity → a Jones vector jones (Ex, Ey). The entry into jones.

> The detailed description below is the original text — the summary and the headings are translated.

方位角 ψ = azimuth_deg、楕円率角 χ = ellipticity_deg(|χ| <= 45 度)で

E = A · [cos ψ cos χ + i sin ψ sin χ, sin ψ cos χ − i cos ψ sin χ]

を返す。optics.stokes_from_jones の約束(S3 = 2 Im(Ex·conj(Ey)))のもとで Stokes が (A², A² cos2χ cos2ψ, A² cos2χ sin2ψ, A² sin2χ) になるように符号を選んである(χ = 0 で直線偏光、χ = +45 度で S3 > 0 の円偏光 = [1, -i]/√2)。jones_apply に通す入射光の状態として使う。それまで Jones ベクトルを作る op が無く、jones_apply の第 2 入力と stokes_from_jones に何も渡せなかった。

Args:

azimuth_deg: 偏光楕円の長軸の向き [度] (+x から +y へ)。有限。

ellipticity_deg: 楕円率角 [度]、[-45, 45]。

amplitude: 振幅 A(>= 0、有限)。強度は A²。

Returns:

(2,) complex128。

Raises:

ValueError: 非有限 / ellipticity が [-45, 45] の外 / amplitude < 0。

References (sample data, literature)

• 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.

Runnable examples (verified samples that actually call this op)

• type_connectivity_tour — py -3.11 examples/type_connectivity_tour.py

Ops the type connects to (they accept jones as input)

—

Same category (entry)

indices_to_positions · synapse_table_from_table


*Provenance: reprconv.py — REPRCONV 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.