PE-MIRROR-DIE-021 · Standard + Custom

Dielectric Mirrors

Custom-wavelength high-reflectivity mirrors for laser and precision optics

Material
BK7 / Fused Silica substrate
Wavelength
Custom design wavelength
Type
Dielectric HR
Category
Optical Mirrors
Request a Quote Ask AI Optical Engineer
Dielectric Mirrors

Key Specifications

Critical Parameters for Mirrors

When specifying this product, these parameters most directly impact performance and cost:

Wavelength Reflectivity Surface Quality Flatness Damage Threshold
TypeDielectric HR (multi-layer)
Reflectivity> 99.9% at design wavelength
SubstrateBK7 / UV Fused Silica / Custom
Diameter5-150 mm
Surface Quality20-10 / 10-5
Flatnessλ/4 to λ/20
LIDTHigh (depends on design)
AOI0°, 45°, or custom

Parameter Reference Guide

Typical Standard capability — available as shown
Available Alternative options exist — request quotation
Custom Per your drawing — quote after review
Subject to Review Depends on project specifics

What Is a Dielectric Mirrors?

Dielectric mirrors use alternating layers of high and low refractive index materials to create constructive interference at the design wavelength, achieving reflectivities above 99.9%. Unlike metallic mirrors, they offer extremely high reflectivity and laser damage threshold at specific wavelengths.

They are the standard choice for laser cavities, high-power laser systems, and any application requiring maximum reflectivity at a specific wavelength band.

When Should You Use This Product?

✔ Good Choice When

  • ✓ Laser cavity mirrors requiring R > 99.9%
  • ✓ High-power laser systems needing high LIDT
  • ✓ Specific wavelength high reflection
  • ✓ Precision optical systems requiring low absorption

⚠ Consider an Alternative When

✗ Broadband reflection needed Protected Silver Mirror
✗ UV to NIR broadband Protected Aluminum Mirror
✗ IR broadband Protected Gold Mirror
✗ Budget broadband use Enhanced Aluminum Mirror

Available Optical Materials

Select the optimal substrate material based on your wavelength, environment, and budget requirements.

MaterialTransmissionKey AdvantageConsiderations
BK7VIS / NIR substrateStandard substrate for visible mirrorsNot for UV or IR
UV Fused SilicaUV / VIS / NIR substrateLow thermal expansion, high LIDTHigher cost
Float GlassVIS substrateEconomy choice for visible mirrorsLower optical quality

Not sure which material to choose?

Ask AI Optical Engineer

Optical Coating Options

Dielectric HR (Custom)

Multi-layer dielectric. R > 99.9% at design wavelength. High LIDT.

Typical use: Laser cavities, high-power laser systems

Dielectric Partial Reflector

Controlled reflectivity (e.g., 95%, 90%, 50%).

Typical use: Output couplers, sampling mirrors

Dielectric Beamsplitter

Wavelength-specific splitting ratio.

Typical use: Dichroic and wavelength separation

How to Specify Your Coating

To select the right coating, please provide: (1) Operating wavelength, (2) Angle of incidence, (3) Required transmission or reflectivity, (4) Laser power density (if applicable), (5) Operating environment.

Engineering Considerations

Key factors to evaluate when specifying this optical component for your system.

Wavelength Specificity

Dielectric mirrors are wavelength-specific. Performance drops rapidly away from design wavelength.

LIDT

Dielectric coatings have the highest LIDT of any mirror type. Specify laser parameters for proper design.

AOI

Reflectance and polarization performance change with angle. Specify AOI for proper coating design.

Polarization

At non-normal AOI, S and P polarization have different reflectance. Consider for polarized laser systems.

Applications

Laser Systems

Beam delivery, focusing, and conditioning for industrial and scientific laser systems.

Semiconductor

Wafer inspection, lithography support, and process control optics.

Machine Vision

Image formation in inspection systems and quality control cameras.

Research & Education

Laboratory optics, teaching setups, and experimental beam paths.

Manufacturing & Customization

Manufacturing Capability Levels

Capability Standard Precision Project-Specific
Surface Quality 40-20 20-10 10-5 or tighter
Flatness λ/4 λ/10 λ/20+
Dimensional Tol. ±0.05mm ±0.01mm ±0.005mm
Centration ≤3 arc-min ≤1 arc-min ≤30 arc-sec

Actual capability depends on material, geometry and coating. Final specifications confirmed through engineering review.

PhotonEdge supports optical component sourcing, engineering review, and qualified manufacturing through our optical manufacturing network. We coordinate production, coating, and inspection to deliver components that meet your specifications.

🔬
Prototype
⚙️
Low Volume
🏭
Volume Production
📋
Custom Specification

Quality Assurance

Dimensional Inspection

Diameter, thickness, focal length verified per specification

Surface Quality

Scratch-dig inspection under calibrated illumination

Coating Verification

Spectrophotometric measurement of transmission/reflectance

Inspection documentation available according to project requirements. Certificates of Conformance, material test reports, and coating curves can be provided.

Available Documentation

Document Purpose
Inspection Report Confirms optical and mechanical specifications
Material Certificate Confirms substrate material and grade
Coating Report Confirms coating performance and wavelength range
Certificate of Conformity Confirms conformity to agreed requirements
Dimensional Report Confirms mechanical dimensions and tolerances

Documentation provided according to agreed project requirements.

You May Also Need

Protected Silver Mirrors

Broadband HR mirrors

1064nm Laser Mirrors

Nd:YAG laser specific

UV Mirrors

UV-optimized HR mirrors

Protected Aluminum Mirrors

UV-NIR broadband

Related Knowledge

How to Choose the Right Optical Mirror

Read article

Laser Optics: Component Selection Guide

Read article

Understanding Optical Coatings

Read article

How to Choose the Right Optical Lens

Read article

Engineering Documentation

The following documentation is available upon request for qualified engineering projects:

📐
Dimensional Drawing

CAD & dimensional specs per your requirements

📊
Material Data Sheet

Material properties, transmission curves & certificates

📈
Coating Performance Curve

Spectrophotometric measurement data

🔍
Inspection Report

Surface quality, flatness, centration & dimensional data

✅
Certificate of Conformance

CoC with full traceability per project requirements

📋
Custom Specification Sheet

Application-specific specification documentation

Documentation availability depends on project scope and order quantity. Request details during RFQ.

How to Specify

When requesting a quote, please provide the following information:

Engineering Considerations

Ordering Information

Price Range
See Quote
Standard Lead Time
Ships within 1 week after payment
Custom Lead Time
Subject to engineering evaluation
MOQ
1 Piece
Samples
Available

Contact us for exact pricing based on your specifications.

Specification Parameters

Typical Specifications shown on this page are standard capabilities. Available Options include alternative materials and coatings. Custom Specifications are available per your drawing. Requirements beyond standard capability are marked Subject to Engineering Review.

Get a Quote Full Ordering Guide

Frequently Asked Questions

What reflectivity can I expect?

Reflectivity depends on the coating: Protected Silver > 97% (400-2000nm), Protected Al > 90% (250-2000nm), Dielectric HR > 99.9% at design wavelength.

What is the laser damage threshold?

LIDT depends on coating type. Dielectric HR coatings typically have the highest LIDT. Specify your laser parameters for proper coating selection.

What substrates are available?

Standard substrates include BK7, UV Fused Silica, and Float Glass. For IR applications, we offer Cu, Mo, and Si substrates.

Can mirrors be used at non-normal incidence?

Yes. Specify the angle of incidence (AOI) for proper coating design. S-polarization and P-polarization have different reflectance at oblique angles.

How should I handle and clean mirrors?

Handle by edges only. Use compressed gas for dust removal. For smudges, use optical-grade cleaning solvents with lint-free wipes. Avoid touching coated surfaces.

What is the lead time for custom mirrors?

Custom optics require engineering evaluation. Lead time is confirmed with your quotation.

Are dielectric mirrors broadband?

No, they are wavelength-specific. For broadband reflection, use protected silver or aluminum mirrors.

Not Sure Which Specification You Need?

Describe your optical system and our AI Optical Engineer will help identify the right specifications, materials, and coatings for your application.

Ask AI Optical Engineer

Before Requesting a Quote

To help us provide an accurate quotation, please prepare the following information. Not all fields are required — send what you have, and our engineering team can help identify missing parameters.

✓ Material
BK7, fused silica, CaF₂, etc.
✓ Dimensions
Diameter, thickness, focal length
✓ Wavelength
Operating wavelength or range
✓ Coating
AR, HR, metallic, or uncoated
✓ Surface Quality
Scratch-dig, roughness
✓ Quantity
Prototype, low volume, or production
✓ Application
Laser, imaging, spectroscopy, etc.
✓ Operating Environment
Temperature, vacuum, cleanroom

Not sure about some specifications? Send what you have — our engineering team will help identify the missing parameters and recommend appropriate values for your application.

Request a Quote

Provide your requirements and our engineering team will respond within 1 business day with a detailed quotation.

TypeReflectivitySubstrateDiameterSurface QualityFlatnessLIDTAOI
Request a Quote

Have a Custom Requirement?

Upload your drawing or specifications. Our engineering team will review and respond within 1 business day.

Upload Your Drawing Request a Quote