INDUSTRY COMPONENT

Mirror Substrate

Precision substrate for collimating mirrors in optical systems, providing dimensional stability and surface quality for accurate light reflection.

Component Specifications

Definition
A mirror substrate is the foundational structural component of a collimating mirror, engineered to support the reflective coating layer while maintaining precise geometric tolerances, thermal stability, and minimal surface deformation under operational conditions. It serves as the critical interface between mechanical mounting systems and optical performance in laser, measurement, and imaging applications.
Working Principle
The substrate provides a rigid, dimensionally stable platform that maintains the precise curvature (typically flat, spherical, or parabolic) required for collimating light. It minimizes thermal expansion-induced distortions and mechanical vibrations, ensuring the reflective surface maintains alignment to produce parallel light beams with minimal divergence.
Materials
Typically made from low-expansion materials: borosilicate glass (e.g., Pyrex), fused silica, Zerodur, or metal alloys (aluminum, beryllium) with nickel plating. Material selection depends on thermal stability requirements, weight constraints, and coating adhesion properties.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Parallelism< 5 arcseconds
Surface Quality20-10 scratch-dig per MIL-PRF-13830B
Surface Flatnessλ/10 to λ/20 (at 632.8 nm)
Surface Roughness< 5 Å RMS
Thickness Variation±0.1 mm
Diameter/Size Tolerance±0.05 mm
Thermal Expansion Coefficient< 1×10⁻⁶/K (for precision applications)

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, MIL-PRF-13830B

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Thermal distortion affecting optical alignment
  • Surface contamination reducing reflectivity
  • Mechanical stress causing micro-cracks
  • Coating adhesion failure due to improper surface preparation
FMEA Triads
Trigger: Inadequate thermal stabilization during manufacturing
Failure: Residual stress causing gradual surface deformation
Mitigation: Implement controlled annealing cycles and stress testing per ISO 10110-12
Trigger: Improper handling during coating process
Failure: Surface contamination leading to coating defects
Mitigation: Use Class 100 cleanroom protocols and automated handling systems
Trigger: Incompatible CTE between substrate and mounting hardware
Failure: Thermal cycling-induced misalignment
Mitigation: Match thermal expansion coefficients or use flexure mounts

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Geometric tolerances per ISO 10110-5, surface specifications per ISO 14997
Test Method
Interferometry for surface flatness, profilometry for roughness, thermal cycling tests per MIL-STD-810

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 Mirror Substrate

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

CLZ Precision Optics
Changchun, Jilin, CN
Also makes: Band-Pass Filter
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Uncoated Concave Mirror Substrates”
View source page ↗ clzoptics.com · checked 2026-09-02

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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Frequently Asked Questions

What materials are best for high-precision mirror substrates?

Fused silica and Zerodur offer the lowest thermal expansion (<0.1×10⁻⁶/K), ideal for stable environments. Borosilicate glass provides good balance of stability and cost for most industrial applications.

How does substrate quality affect collimating mirror performance?

Substrate imperfections directly transfer to the reflective surface, causing wavefront errors, beam divergence, and reduced collimation accuracy. Surface flatness below λ/10 is critical for precision applications.

Can metal substrates be used for collimating mirrors?

Yes, aluminum with nickel plating is common where weight or thermal conductivity matters, but requires careful thermal management due to higher expansion coefficients.

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.

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