# 📐  L2 Spec — Shearography (ESPI-based strain imaging) Mismatch-Only Spec

**ID:** `L2-119-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-119`](/artifact/l1/L1-119)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41554215

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| H | px | 256 – 4096 |
| W | px | 256 – 4096 |
| Snr db | dB | 0.0 – 30.0 |
| Pixel um | µm | 1 – 100 |
| Shear mm | mm | 0.1 – 10 |
| Shear calibration | — | 0.0 – 0.1 |
| Vibration isolation | — | 0.3 – 1.0 |
| Speckle decorrelation | — | 0.0 – 0.5 |
| Illumination uniformity | — | 0.5 – 1.0 |

## 2. Tolerance (ε)

**Type:** `fn`

```
14.0 + 0.3 * SNR_dB + 6.0 * vibration_isolation - 10.0 * speckle_decorrelation
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |

## 4. Fingerprint

`41ddece66e4be5e911f7418041770f57d8926296bed087a6b58c1fd85e020a26`

## 5. On-chain Registration

- **Chain hash:** `0x63beda8162bc8b7d252a792ebdc95d68bd684f05445dff0cd42290e4002dee61`
- **Chain tx hash:** `0x32b61961502673a553945b7a806e8482ac449e38235937a52cdc355c49555e45`
- **Chain block:** `41554215`

---

## File Mapping

This bundle consists of: `L2-119-001.md`, `L2-119-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-119-001.md` | Source of truth — edit this | Human or LLM |
| `L2-119-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |

**Prompt for your LLM after editing this Markdown:**

> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.

_This Markdown was auto-synthesized from the catalog row for `L2-119-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._