---
title: "Precision Aspheric Lens Element"
industry: "Manufacture of Optical Instruments and Photographic Equipment"
verification_protocol:
  urn: "URN:CNFX:ME:PRECISION_ASPHERIC_LENS_ELEMENT"
  data_integrity_hash: "a0474b0d967da52e45b51a462a2abcca"
  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_ASPHERIC_LENS_ELEMENT"
  data_source_uri: "https://cnfx.com/llms/industry/manufacture-optical-photographic-equipment/product/precision-aspheric-lens-element.md"
  official_resource_url: "https://cnfx.com/industry/manufacture-optical-photographic-equipment/product/precision-aspheric-lens-element"
  is_verified_logic: true
attributes:
  focal_length:
    status: "config-dependent"
    typical_range: "Surface form error &lt; 0.1 μm RMS, surface roughness &lt; 1 nm Ra, transmitted wavefront error &lt; λ/10 at 632.8 nm"
    unit: "mm"
  surface_figure_error:
    status: "config-dependent"
    typical_range: "Surface form error &lt; 0.1 μm RMS, surface roughness &lt; 1 nm Ra, transmitted wavefront error &lt; λ/10 at 632.8 nm"
    unit: "λ (wavelengths)"
engineering_limits:
  max_safe_operating_point:
    value: 5
    unit: "nm"
    consequence: "Surface deformation exceeding Rayleigh quarter-wave criterion causes destructive interference, scattering losses exceeding 5% per surface, and Strehl ratio dropping below 0.8"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Thermal expansion coefficient mismatch between lens material (N-BK7: 7.1×10⁻⁶/K) and mounting structure (Aluminum: 23.1×10⁻⁶/K)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Invar alloy (1.2×10⁻⁶/K) mounting structure with kinematic flexure mounts allowing 50 μm radial compliance"
  - node_2:
      trigger: "Subsurface damage from diamond turning exceeding 2 μm depth with residual stress &gt; 200 MPa"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Magnetorheological finishing with 0.5 μm abrasive removal of damaged layer followed by acid etching in 5% HF for 30 minutes"
bom_nodes:
  optical-substrate:
    type: "component"
    urn: "URN:CNFX:ME:OPTICAL_SUBSTRATE"
    interface_type: "physical-logic-coupled"
  anti-reflection-coating:
    type: "component"
    urn: "URN:CNFX:ME:ANTI_REFLECTION_COATING"
    interface_type: "physical-logic-coupled"
  protective-bevel:
    type: "component"
    urn: "URN:CNFX:ME:PROTECTIVE_BEVEL"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 10110-12:2017 (OPTICS AND PHOTONICS - PREPARATION OF DRAWINGS FOR OPTICAL ELEMENTS AND SYSTEMS - PART 12: ASPHERIC SURFACES)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/OP 1.001-2009 (AMERICAN NATIONAL STANDARD FOR OPTICS AND OPTICAL INSTRUMENTS - PREPARATION OF DRAWINGS FOR OPTICAL ELEMENTS AND SYSTEMS)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 3140-7:2016 (DIMENSIONING AND TOLERANCING OF OPTICAL COMPONENTS - PART 7: ASPHERIC SURFACES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/manufacture-optical-photographic-equipment/product/precision-aspheric-lens-element.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "5ffc0ed46526e25c0497c9997883dcacca6ad4a124aef9d256157491d6ba5463"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Precision Aspheric Lens Element

## 1. Technical Definition
A single, optically ground lens with a non-spherical surface profile.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **Surface form error &lt; 0.1 μm RMS, surface roughness &lt; 1 nm Ra, transmitted wavefront error &lt; λ/10 at 632.8 nm**. Failure boundary: **Surface form error &gt; 0.5 μm RMS, surface roughness &gt; 5 nm Ra, transmitted wavefront error &gt; λ/4 at 632.8 nm**, Mechanism: **Surface deformation exceeding Rayleigh quarter-wave criterion causes destructive interference, scattering losses exceeding 5% per surface, and Strehl ratio dropping below 0.8**.

### 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 |
| :--- | :--- | :--- | :--- |
| Thermal expansion coefficient mismatch between lens material (N-BK7: 7.1×10⁻⁶/K) and mounting structure (Aluminum: 23.1×10⁻⁶/K) | 8 | Surface deformation exceeding 0.5 μm RMS due to differential thermal stress at ΔT &gt; 15°C | Invar alloy (1.2×10⁻⁶/K) mounting structure with kinematic flexure mounts allowing 50 μm radial compliance |
| Subsurface damage from diamond turning exceeding 2 μm depth with residual stress &gt; 200 MPa | 8 | Crack propagation from subsurface defects under 10⁷ cycles at 10 Hz vibration frequency | Magnetorheological finishing with 0.5 μm abrasive removal of damaged layer followed by acid etching in 5% HF for 30 minutes |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| focal_length | Config-dependent | mm | Verified |
| surface_figure_error | Config-dependent | λ (wavelengths) | Verified |

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **CNC Aspheric Grinding Machine**, **Magnetorheological Finishing Machine**, **Interferometric Surface Profiler**  
**Downstream Applications**: High-End Camera Lenses, Medical Endoscopes, Laser Beam Expanders  

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

### Q: What are the advantages of using an aspheric lens element over a spherical lens?
**A**: Aspheric lens elements reduce spherical aberration, coma, and distortion, resulting in sharper images with fewer optical errors, especially in wide-aperture or compact optical systems.

### Q: What materials are available for precision aspheric lens elements?
**A**: We offer optical glass types like N-BK7 and Fused Silica for high-performance applications, and optical plastics such as PMMA or Polycarbonate for cost-effective or lightweight designs.

### Q: How do I specify the surface quality and accuracy for my application?
**A**: Surface accuracy is measured in RMS (root mean square) nanometers, with lower values indicating higher precision. Surface quality uses the Scratch-Dig code (e.g., 60-40), where smaller numbers denote fewer defects. We'll help you select based on your optical requirements.

## 6. Manufacturing Compliance
- ISO 10110-12:2017 (OPTICS AND PHOTONICS - PREPARATION OF DRAWINGS FOR OPTICAL ELEMENTS AND SYSTEMS - PART 12: ASPHERIC SURFACES)
- ANSI/OP 1.001-2009 (AMERICAN NATIONAL STANDARD FOR OPTICS AND OPTICAL INSTRUMENTS - PREPARATION OF DRAWINGS FOR OPTICAL ELEMENTS AND SYSTEMS)
- DIN 3140-7:2016 (DIMENSIONING AND TOLERANCING OF OPTICAL COMPONENTS - PART 7: ASPHERIC SURFACES)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Precision Aspheric Lens Element](https://cnfx.com/industry/manufacture-optical-photographic-equipment/product/precision-aspheric-lens-element)**

### 🌐 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**: PRECISION_ASPHERIC_LENS_ELEMENT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: b330099a
