---
title: "Precision Optical Encoder Grating Disc"
industry: "Manufacture of Measuring, Testing, Navigation and Control Equipment"
verification_protocol:
  urn: "URN:CNFX:ME:PRECISION_OPTICAL_ENCODER_GRATING_DISC"
  data_integrity_hash: "41d1642ad583c6dcb65e71f1ef5e2d90"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:PRECISION_OPTICAL_ENCODER_GRATING_DISC"
  data_source_uri: "https://cnfx.com/llms/industry/manufacture-measuring-testing-navigation-equipment/product/precision-optical-encoder-grating-disc.md"
  official_resource_url: "https://cnfx.com/industry/manufacture-measuring-testing-navigation-equipment/product/precision-optical-encoder-grating-disc"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "0-10000 RPM with 0.1 arc-second angular resolution"
    unit: "lines/revolution"
  secondary_spec:
    status: "config-dependent"
    typical_range: "0-10000 RPM with 0.1 arc-second angular resolution"
    unit: "μm"
engineering_limits:
  max_safe_operating_point:
    value: 50
    unit: "nm"
    consequence: "Thermal expansion mismatch between borosilicate glass substrate (α=3.3×10⁻⁶/K) and chromium etching (α=4.9×10⁻⁶/K) causing pattern distortion at ΔT&gt;80°C"
fmea_matrix_quantitative:
  - node_1:
      trigger: "UV radiation exposure exceeding 1000 W/m² for &gt;1000 hours"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hermetic sealing with UV-blocking fused silica window (transmission cutoff at 200 nm)"
  - node_2:
      trigger: "Centrifugal stress exceeding 120 MPa at disc periphery"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Ion-beam etching with &lt;5 nm edge roughness and compressive stress layer deposition"
bom_nodes:
  glass-substrate:
    type: "component"
    urn: "URN:CNFX:ME:GLASS_SUBSTRATE"
    interface_type: "physical-logic-coupled"
  chrome-grating-layer:
    type: "component"
    urn: "URN:CNFX:ME:CHROME_GRATING_LAYER"
    interface_type: "physical-logic-coupled"
  anti-reflective-coating:
    type: "component"
    urn: "URN:CNFX:ME:ANTI_REFLECTIVE_COATING"
    interface_type: "physical-logic-coupled"
  protective-overcoat:
    type: "component"
    urn: "URN:CNFX:ME:PROTECTIVE_OVERCOAT"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 230-2:2014 (GEOMETRIC ACCURACY OF MACHINES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/manufacture-measuring-testing-navigation-equipment/product/precision-optical-encoder-grating-disc.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "30396ce09c7ea67adf664f4ced64752f98acb2771921b8c78b45c757767c8e60"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Precision Optical Encoder Grating Disc

## 1. Technical Definition
High-resolution glass disc with etched radial patterns for angular position sensing

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-10000 RPM with 0.1 arc-second angular resolution**. Failure boundary: **Pattern deformation exceeding 50 nm RMS surface roughness or 0.5 μm radial runout**, Mechanism: **Thermal expansion mismatch between borosilicate glass substrate (α=3.3×10⁻⁶/K) and chromium etching (α=4.9×10⁻⁶/K) causing pattern distortion at ΔT&gt;80°C**.

### 2.1 Analytical Physics Model
Governed by the **Rayleigh Resolution Criterion**:

> **Primary Equation**: $d = \frac{0.61 \lambda}{NA}$  
> **Engineering Impact**: Defines the theoretical limit of machine vision systems.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| \lambda | Wavelength | Engineering Constant |
| NA | Numerical Aperture | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| UV radiation exposure exceeding 1000 W/m² for &gt;1000 hours | 8 | Photoresist degradation causing 20% contrast loss in diffraction efficiency | Hermetic sealing with UV-blocking fused silica window (transmission cutoff at 200 nm) |
| Centrifugal stress exceeding 120 MPa at disc periphery | 8 | Radial crack propagation from micro-etching defects | Ion-beam etching with &lt;5 nm edge roughness and compressive stress layer deposition |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | lines/revolution | Verified |
| secondary_spec | Config-dependent | μm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Cleanroom Environment System**, **Precision Photolithography System**, **Laser Interferometer Measurement System**  
**Downstream Applications**: CNC Machine Rotary Encoders, Medical Imaging Equipment Positioning Systems, Aerospace Navigation Instruments  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What are the key applications for this precision optical encoder grating disc?
**A**: This disc is designed for high-accuracy angular position sensing in measuring instruments, industrial automation systems, robotics, navigation equipment, and precision control devices requiring reliable position feedback.

### Q: How does the chrome coating enhance the encoder disc performance?
**A**: The chrome coating provides excellent contrast for optical reading systems, ensures precise etching of radial patterns, offers durability against environmental factors, and maintains consistent reflectivity for reliable signal generation.

### Q: What specifications should I consider when selecting this encoder disc?
**A**: Key specifications include disc diameter, grating resolution (lines/revolution), line pitch accuracy, mounting bore diameter, operating temperature range, and surface flatness to ensure compatibility with your optical encoder system requirements.

## 6. Manufacturing Compliance
- ISO 230-2:2014 (GEOMETRIC ACCURACY OF MACHINES)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Precision Optical Encoder Grating Disc](https://cnfx.com/industry/manufacture-measuring-testing-navigation-equipment/product/precision-optical-encoder-grating-disc)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: PRECISION_OPTICAL_ENCODER_GRATING_DISC | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 04718fe2
