---
title: "Lens Barrel"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:LENS_BARREL"
  data_integrity_hash: "a5e3861185f7d7ce57c754d606eea606"
  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:LENS_BARREL"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/lens-barrel.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/lens-barrel"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "Axial displacement tolerance: ±0.005 mm, Radial runout: &lt;0.003 mm, Temperature range: -40°C to +85°C"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 0.015
    unit: "mm"
    consequence: "Differential thermal expansion between aluminum barrel (α=23.1×10⁻⁶/K) and glass lenses (α=8.5×10⁻⁶/K) creates compressive stresses exceeding glass yield strength (50 MPa) at ΔT&gt;45°C"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Cyclic thermal loading at 0.1 Hz with ΔT=60°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement Invar 36 alloy spacer (α=1.3×10⁻⁶/K) between barrel and lens groups"
  - node_2:
      trigger: "Moisture ingress &gt;1000 ppm at 85% RH"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Apply MIL-PRF-81322 Type II chromate conversion coating with 0.0005 mm thickness"
bom_nodes:
  mounting-threads:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_THREADS"
    interface_type: "physical-logic-coupled"
  focusing-helix:
    type: "part"
    urn: "URN:CNFX:ME:FOCUSING_HELIX"
    interface_type: "physical-logic-coupled"
  aperture-ring:
    type: "component"
    urn: "URN:CNFX:ME:APERTURE_RING"
    interface_type: "physical-logic-coupled"
  bayonet-mount:
    type: "component"
    urn: "URN:CNFX:ME:BAYONET_MOUNT"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/lens-barrel.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "b207edd2655ca777a8dc59359bf4b748e65c3169c392599f2292790457e3c97e"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Lens Barrel

## 1. Technical Definition
A cylindrical housing that holds and aligns optical lens elements within a lens assembly.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Axial displacement tolerance: ±0.005 mm, Radial runout: &lt;0.003 mm, Temperature range: -40°C to +85°C**. Failure boundary: **Axial displacement &gt;0.015 mm causes optical misalignment &gt;0.5 arcminutes, Radial runout &gt;0.008 mm induces chromatic aberration &gt;2.5% MTF degradation**, Mechanism: **Differential thermal expansion between aluminum barrel (α=23.1×10⁻⁶/K) and glass lenses (α=8.5×10⁻⁶/K) creates compressive stresses exceeding glass yield strength (50 MPa) at ΔT&gt;45°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 |
| :--- | :--- | :--- | :--- |
| Cyclic thermal loading at 0.1 Hz with ΔT=60°C | 8 | Barrel thread galling causing lens element tilt &gt;0.02° | Implement Invar 36 alloy spacer (α=1.3×10⁻⁶/K) between barrel and lens groups |
| Moisture ingress &gt;1000 ppm at 85% RH | 8 | Aluminum oxide formation increasing friction coefficient from 0.15 to 0.45 | Apply MIL-PRF-81322 Type II chromate conversion coating with 0.0005 mm thickness |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Focusing Helix](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/focusing-helix.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **CNC Machining Center**, **Coordinate Measuring Machine**, **Optical Assembly Station**  
**Downstream Applications**: Camera Lenses, Microscope Objectives, Medical Endoscopes  

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

### Q: What materials are commonly used for lens barrels in optical manufacturing?
**A**: Lens barrels are typically made from aluminum alloy for lightweight precision, engineering plastic for cost-effective applications, or stainless steel for maximum durability and corrosion resistance in demanding environments.

### Q: What are the key components of a lens barrel assembly?
**A**: A complete lens barrel assembly includes mounting threads for secure attachment, a focusing helix for precise adjustment, an aperture ring for light control, and a bayonet mount for quick lens changes in optical systems.

### Q: How does a lens barrel ensure optical performance in manufacturing applications?
**A**: The lens barrel maintains precise alignment of optical elements, prevents light leakage, provides mechanical protection, and enables accurate focusing adjustments—all critical for consistent optical performance in computer, electronic, and optical product manufacturing.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Lens Barrel](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/lens-barrel)**

### 🌐 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**: LENS_BARREL | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: daeb5a2c
