Dielectric Mirror
Dielectric Mirror

Dielectric Mirror

Sunday Optics manufactures high-reflectivity dielectric mirrors for laser systems, medical and diagnostic instruments, scientific equipment, and OEM optical assemblies. A dielectric mirror uses a multilayer optical coating designed for a specified wavelength, angle of incidence (AOI), and polarization, helping achieve high reflectivity within the required operating band.


The Dielectric coated high reflection mirror has a high reflective 99.90% can meet customers’ demands, this mirror can be used laser system, medical and many other applications.

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Custom Dielectric Mirror Options

Our current dielectric mirror specifications cover diameters from 2 mm to 400 mm, with substrate options including N-BK7, sapphire, fused silica, CaF2, silicon, and germanium. Standard requirements include 40-20 surface quality and λ/4 flatness. Reflectivity can reach up to 99.90% for a qualified coating design; the final value should always be stated together with the wavelength range, AOI, polarization, and test conditions.


Dielectric mirrors are performance-specific optical components. The coating wavelength, angle of incidence, polarization, substrate, clear aperture, surface quality, flatness, and laser loading should be considered together when selecting a mirror.


Laser Line Dielectric Mirrors

Laser line dielectric mirrors are optimized for a specific laser wavelength or a narrow wavelength band. They are suitable for beam steering, beam folding, laser alignment, and resonator applications where high reflectivity and low optical loss are important.


Broadband Dielectric Mirrors

Broadband dielectric mirrors are designed to maintain high reflectivity across a wider wavelength range. They can be used in multi-wavelength laser systems, spectroscopy, imaging, microscopy, and other optical instruments. For broadband applications, provide all operating wavelengths together with the expected AOI and polarization


Substrate and Dimensional Selection

Substrate selection depends on the operating wavelength, thermal conditions, mirror size, optical power, and system budget. N-BK7, sapphire, fused silica, CaF2, silicon, and germanium can be evaluated for different UV, visible, NIR, and IR applications. Round, square, rectangular, and other custom geometries can be reviewed according to the optical path and mounting requirements.

Specifications

Diameter2mm to 400mm
Diameter Tol.+/-0.1
MaterialBk7 sapphire fused silica, ZnS2, CaF2, Si, Ge.
Surface Quality40-20 standard
Flatness1/4 lambda
Chamfer0.25mmx45degree
CoatingDielectric, R>99%

Dielectric Mirror vs. Metal Mirror

Selection FactorDielectric MirrorMetal Mirror
ReflectivityVery high reflectivity within the designed wavelength bandGenerally suitable for broader spectral reflection
BandwidthCoating-specific and designed for a target wavelength rangeUsually provides broader wavelength coverage
Selection FactorsWavelength, AOI, polarization, coating design, and laser powerBandwidth, environment, reflectivity, and cost
ApplicationsLaser systems, beam steering, resonators, spectroscopy, and precision opticsBroadband reflection and general optical systems


Applications of Dielectric Mirrors


Why Choose Sunday Optics Dielectric Mirrors?


Sunday Optics is a dielectric mirror manufacturer combining optical design, substrate processing, coating, and assembly. We help OEM buyers match mirror specifications to their optical systems, with support for sample evaluation and volume production.

High Reflectivity for Your Laser Beam Path

Our dielectric coated mirrors offer reflectivity above 99% within the agreed coating specification, helping reduce reflection losses in laser systems. Share your operating wavelength, angle of incidence, and polarization so we can evaluate the coating requirements for your application.

Custom Dielectric Mirrors from 2 mm to 400 mm

Match the mirror to your beam size and mounting space. Our published diameter range covers 2–400 mm, with substrate options including BK7, fused silica, sapphire, CaF₂, silicon, and germanium. We review material and dimensional requirements together to support integration into your equipment.

Optical Processing and Coating Under One Roof

Work with one manufacturer for grinding, polishing, coating, and optical assembly. Keeping these processes within Sunday Optics simplifies technical communication and helps coordinate substrate specifications with coating requirements throughout your project.

Inspection Capabilities for Technical Evaluation

Our metrology equipment includes Zygo interferometers and spectrophotometers for evaluating surface form and spectral performance. Discuss your inspection and documentation requirements before ordering so the acceptance criteria for your dielectric laser mirrors are clear.

Sample Evaluation Before Volume Purchasing

Sunday Optics supports both sample orders and mass production of custom optical mirrors. Start with samples to evaluate mechanical fit and optical performance, then plan production quantities around your approved requirements.

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