---
title: "Focusing Mechanism"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:FOCUSING_MECHANISM"
  data_integrity_hash: "e77096bdad7500bb02b452b4edaadbc3"
  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:FOCUSING_MECHANISM"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/focusing-mechanism.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/focusing-mechanism"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-5.0 mm axial displacement, 0.1-10.0 N actuation force"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 7.5
    unit: "N"
    consequence: "Plastic deformation of lead screw threads (exceeding 250 MPa yield strength of 17-4PH stainless steel) or stepper motor magnetic saturation (exceeding 1.8 Tesla flux density)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Lead screw thermal expansion mismatch (Δα=12×10⁻⁶ K⁻¹ between aluminum housing and steel screw)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Invar alloy coupling (α=1.2×10⁻⁶ K⁻¹) between motor and lead screw"
  - node_2:
      trigger: "Optical encoder contamination (particle size &gt;5 μm on 20 μm pitch grating)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "IP67-rated encoder housing with labyrinth seal (exclusion of particles &gt;1 μm)"
bom_nodes:
  focusing-lens-mount:
    type: "part"
    urn: "URN:CNFX:ME:FOCUSING_LENS_MOUNT"
    interface_type: "physical-logic-coupled"
  lead-screw-assembly:
    type: "part"
    urn: "URN:CNFX:ME:LEAD_SCREW_ASSEMBLY"
    interface_type: "physical-logic-coupled"
  stepper-motor:
    type: "part"
    urn: "URN:CNFX:ME:STEPPER_MOTOR"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 10110-7:2017 (OPTICS AND PHOTONICS - PREPARATION OF DRAWINGS FOR OPTICAL ELEMENTS AND SYSTEMS - PART 7: SURFACE IMPERFECTION TOLERANCES)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASME B46.1-2019 (SURFACE TEXTURE, SURFACE ROUGHNESS, WAVINESS, AND LAY)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 3140-7:2015 (DRAWING INDICATIONS FOR OPTICAL ELEMENTS AND SYSTEMS - PART 7: SURFACE FORM TOLERANCES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/focusing-mechanism.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "c2bb5915ca5dcf269e7d0f04f23662b1c90b5966af767ed15904533ef494e9e4"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Focusing Mechanism

## 1. Technical Definition
A mechanical or electromechanical system within an optical scanner that adjusts the distance between optical elements to achieve optimal focus on the target surface.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-5.0 mm axial displacement, 0.1-10.0 N actuation force**. Failure boundary: **Exceeding 7.5 N actuation force or 6.0 mm displacement causes permanent gear deformation**, Mechanism: **Plastic deformation of lead screw threads (exceeding 250 MPa yield strength of 17-4PH stainless steel) or stepper motor magnetic saturation (exceeding 1.8 Tesla flux density)**.

### 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 |
| :--- | :--- | :--- | :--- |
| Lead screw thermal expansion mismatch (Δα=12×10⁻⁶ K⁻¹ between aluminum housing and steel screw) | 8 | Binding-induced stepper motor stall (exceeding 2.5 A holding current) | Invar alloy coupling (α=1.2×10⁻⁶ K⁻¹) between motor and lead screw |
| Optical encoder contamination (particle size &gt;5 μm on 20 μm pitch grating) | 8 | Position feedback error exceeding ±0.01 mm tolerance | IP67-rated encoder housing with labyrinth seal (exclusion of particles &gt;1 μm) |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Focusing Lens Mount](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/focusing-lens-mount.md) `(Standalone System)`
- [Lead Screw Assembly](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/lead-screw-assembly.md) `(Standalone System)`
- [Stepper Motor](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/stepper-motor.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Optical Test Bench**, **Precision Assembly Station**, **Laser Interferometer**  
**Downstream Applications**: Document Scanners, Medical Imaging Devices, Industrial Inspection Systems  

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

### Q: What industries use this focusing mechanism?
**A**: Primarily computer, electronic, and optical product manufacturing for applications requiring precise optical scanning and surface focus adjustment.

### Q: What materials ensure durability in this mechanism?
**A**: Constructed from aluminum alloy for lightweight strength, stainless steel for corrosion resistance, and precision plastic polymers for smooth operation and reduced friction.

### Q: How does the stepper motor contribute to focus accuracy?
**A**: The stepper motor provides precise, incremental movement control for the lead screw assembly, enabling micro-adjustments to achieve optimal focus with high repeatability.

## 6. Manufacturing Compliance
- ISO 10110-7:2017 (OPTICS AND PHOTONICS - PREPARATION OF DRAWINGS FOR OPTICAL ELEMENTS AND SYSTEMS - PART 7: SURFACE IMPERFECTION TOLERANCES)
- ANSI/ASME B46.1-2019 (SURFACE TEXTURE, SURFACE ROUGHNESS, WAVINESS, AND LAY)
- DIN 3140-7:2015 (DRAWING INDICATIONS FOR OPTICAL ELEMENTS AND SYSTEMS - PART 7: SURFACE FORM TOLERANCES)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Focusing Mechanism](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/focusing-mechanism)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: FOCUSING_MECHANISM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 5c73181e
