High Reflector Mirror: Diameter 10-50 mm, Reflectivity >99.9%

Component Specifications

Definition

A High Reflector Mirror is a specialized optical component engineered to achieve extremely high reflectivity (typically >99.9%) at specific wavelengths. It is a critical part of optical resonators in laser systems, where it forms one end of the cavity to reflect light back through the gain medium, enabling stimulated emission and laser oscillation. These mirrors are manufactured with precise surface quality, coating uniformity, and thermal stability to maintain performance under high-power laser operation.

Working Principle

The High Reflector Mirror operates on the principle of constructive interference in dielectric coatings. Multiple thin layers of materials with alternating high and low refractive indices are deposited on a substrate. When light strikes the coating, reflections from each interface interfere constructively at the design wavelength, resulting in near-total reflection. The mirror is positioned in the optical resonator to reflect photons back through the laser gain medium, sustaining the lasing action by providing optical feedback.

Materials

Substrate: Fused silica, BK7 glass, or silicon; Coating: Dielectric materials such as titanium dioxide (TiO2), silicon dioxide (SiO2), tantalum pentoxide (Ta2O5), or hafnium dioxide (HfO2) deposited via physical vapor deposition (PVD) or ion beam sputtering.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	10-50 mm
Coating Type	Dielectric multilayer
Reflectivity	>99.9%
Surface Quality	10-5 scratch-dig
Damage Threshold	>5 J/cm² for nanosecond pulses
Surface Flatness	λ/10 at 632.8 nm
Wavelength Range	Custom (e.g., 1064 nm for Nd:YAG lasers)

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

Parent Products

This component is used in the following industrial products

Optical Resonator

A cavity structure that confines and amplifies light through multiple reflections to sustain laser oscillation.

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Engineering Analysis

Risks & Mitigation

Coating damage from excessive laser power
Surface contamination reducing reflectivity
Thermal distortion under high-power operation
Misalignment in the optical resonator

FMEA Triads

Trigger: Exceeding laser damage threshold
Failure: Coating degradation or substrate damage
Mitigation: Use mirrors rated for the operating power and pulse duration; implement beam diagnostics.

Trigger: Improper handling or cleaning
Failure: Scratches or contamination on the coating
Mitigation: Follow strict handling protocols; use cleanroom environments when possible.

Trigger: Thermal expansion from absorbed heat
Failure: Beam distortion or resonator misalignment
Mitigation: Select materials with low thermal expansion; use water-cooled mounts for high-power applications.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.5% on reflectivity, ±1 nm on center wavelength

Test Method

Spectrophotometry for reflectivity, interferometry for surface flatness, and laser damage testing per ISO 21254.

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

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Manufacturers of High Reflector Mirror

Manufacturer profiles associated with High Reflector Mirror.

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Frequently Asked Questions

What is the typical reflectivity of a High Reflector Mirror?

High Reflector Mirrors typically achieve reflectivities greater than 99.9% at their design wavelength, with some exceeding 99.99% for critical applications.

How are High Reflector Mirrors cleaned and maintained?

Clean with compressed air or a lens tissue moistened with isopropyl alcohol; avoid touching the coated surface directly to prevent contamination or damage.

Can High Reflector Mirrors be used with different laser wavelengths?

No, they are wavelength-specific; using them outside their design range significantly reduces reflectivity and may cause damage.

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.

High Reflector Mirror