Lens Substrate: Diameter Tolerance ±0.05 mm

Component Specifications

Definition

A lens substrate is the core structural component of a focusing lens, typically made from high-purity optical materials with precisely engineered surfaces that serve as the foundation for optical coatings and final lens shaping. It determines the fundamental optical properties, mechanical stability, and thermal characteristics of the complete lens assembly.

Working Principle

The lens substrate functions as the primary optical medium that transmits and refracts light according to its geometric curvature and material refractive index. It provides the precise surface geometry required for focusing light beams, while maintaining dimensional stability under various environmental conditions to ensure consistent optical performance.

Materials

Optical glass (BK7, Fused Silica), Optical crystals (Calcium Fluoride, Zinc Selenide), Optical ceramics (Alumina, Silicon Carbide)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Surface Quality	40-20 Scratch-Dig
Refractive Index	1.45-2.4
Surface Flatness	λ/4 @ 632.8 nm
Diameter Tolerance	±0.05 mm
Thickness Tolerance	±0.1 mm
Thermal Expansion Coefficient	0.5-10 × 10⁻⁶/K

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 10110, ISO 14997, DIN 3140, DIN 58927

Parent Products

This component is used in the following industrial products

Focusing Lens

An optical component that converges or diverges light beams to achieve precise focus within an optical system.

View Product Details

Engineering Analysis

Risks & Mitigation

Surface contamination during handling
Thermal stress cracking
Sub-micron surface defects
Material inhomogeneity
Moisture absorption in hygroscopic materials

FMEA Triads

Trigger: Improper cleaning procedures
Failure: Surface contamination reduces optical transmission
Mitigation: Implement cleanroom handling protocols and regular surface inspection

Trigger: Thermal expansion mismatch with mounting hardware
Failure: Mechanical stress causes surface deformation
Mitigation: Use compatible materials and design thermal compensation mechanisms

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Surface accuracy within λ/10, dimensional tolerance ±0.02 mm

Test Method

Interferometry for surface measurement, spectrophotometry for material properties, coordinate measuring machines for dimensional verification

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Lens Substrate

Manufacturer profiles associated with Lens Substrate.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between a lens substrate and a finished lens?

A lens substrate is the raw optical component with precisely ground surfaces but without final polishing or anti-reflective coatings, while a finished lens has all optical treatments applied and is ready for installation.

Why is material purity important for lens substrates?

High material purity ensures consistent refractive index, minimal light scattering, and reduced absorption, which are critical for maintaining optical performance and minimizing energy loss in focusing systems.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Lens Substrate