99.999% Planar Reflect

The 99.999% ultra-high reflectivity plane mirror is an optical component with extremely high reflectivity and extremely low light loss. It has significant applications in fields such as optical communication, laser technology, laser gyroscopes, high power lasers, ultra-stable lasers,  time-frequency transmission, quantum computing, quantum communication, quantum precision measurement, neutral atoms, cold atoms, Rydberg atoms, and gravitational wave detection.

Ultra-high reflectivity plane mirrors typically use the principle of Bragg mirrors, with thin films of high and low refractive index materials alternately stacked on a substrate to form a one dimensional photonic crystal structure. When the light enters perpendicularly, the optical thickness of each layer of material is designed to be a quarter of the target reflection

wavelength, causing the light reflected from the interface of each layer to undergo constructive interference, superimposing into a powerful reflected beam, while the transmitted light is greatly suppressed due to destructive interference, thus achieving high reflectivity and low loss.

UItraopto Precision Optics Co. Ltd. ultra-high reflectivity plane mirrors can be stably provided through precise control of polishing and coating processes, and custom mirrors of various specifications are accepted.

Premium substrate selection: Ensuring ultra-high planar accuracy

Our 99.999% Planar Reflector is crafted from high-purity synthetic quartz substrates, featuring exceptional optical homogeneity and ultra-low thermal expansion. This ensures stable performance across a wide temperature range (-40°C to 85°C). The substrate undergoes ultra-precise polishing processes to achieve a surface flatness of λ/10 @632.8nm and a surface roughness of less than Ra 0.1nm. minimizing light scattering and ensuring optimal reflection quality. The planar design is engineered with extreme precision, with parallelism controlled within <5 arc seconds, enabling accurate light reflection without beam deviation. Synthetic quartz’s superior mechanical strength and corrosion resistance also make the mirror suitable for ultra-clean laboratory environments and harsh industrial conditions.

Advanced Coating Technology: Achieving Near-Perfect Reflectivity

Our 99.999% Planar Reflector employs cutting-edge ion beam sputtering (IBS) coating technology to deposit dense, defect-free multi-layer dielectric films on the planar surface. This advanced process ensures uniform film thickness and strong adhesion, achieving an unprecedented reflectivity of 99.999% at target wavelengths (532nm, 1064nm and custom wavelengths). The front surface coating is optimized for maximum reflectivity, while the back surface is coated with dielectric anti-reflection (AR) films to reduce back reflection to below 0.15%, eliminating interference from stray light. The coating exhibits excellent durability, withstanding repeated cleaning and environmental exposure without performance degradation. ensuring long service life in critical applications.

Core Performance Advantages: Suitable for Ultra-High Precision Scenarios

Ultraopto’s 99.999% Planar Reflector boasts exceptional surface quality with a 10-5 scratch-dig rating, ensuring minimal surface defects that could affect reflection performance. It features a high laser-induced damage threshold (LIDT>5 J/cm² @1064nm, 20ns, 20Hz), withstanding high-energy laser irradiation without coating damage. The mirror’s clear aperture exceeds 80% of the outer diameter, providing ample active area for light reflection. Strict dimensional tolerance control (+0/-0.25mm for diameter) ensures compatibility with standard optical mounts, while edge chamfering (0.38–1.14mm face width) prevents chipping during installation and handling. The mirror’s low stray loss makes it ideal for building stable Fabry-Pérot cavities with ultra-narrow spectral bandwidth.

All-Scenario Application Coverage: Empowering High-End Research and Industry

Our 99.999% Planar Reflector is widely applied in cutting-edge scientific research and high-end industrial fields. In Fabry-Pérot interferometers, it enables precise measurement of distance and time with ultra-high accuracy. In laser cavities, it ensures stable operation and high beam quality. In high-power laser systems, it can withstand intense laser irradiation without degradation. In optical communication systems, it provides reliable performance for signal transmission. In addition, it is also suitable for use in advanced scientific instruments and precision optical systems. it enhances laser output power and beam quality by minimizing energy loss. For precision measurement instruments such as laser interferometers and optical metrology tools, it provides accurate light reflection for sub-micron level measurement. The mirror also finds use in quantum optics experiments, semiconductor manufacturing and aerospace optical systems, providing reliable ultra-high reflectivity and flatness for the most demanding applications. It is recommended for use in ultra-clean environments to avoid performance degradation from dust or air molecules.

Customized Services: Meeting Personalized Needs

As a leading manufacturer of ultra-high precision optical components, Ultraopto provides fully customized 99.999% Planar Reflector solutions to meet your unique application requirements. Our professional R&D team can tailor key parameters including target wavelength (UV to IR), diameter (from 10mm to 100mm+), surface flatness (up to λ/20 @632.8nm), and more. parallelism and coating design. We support custom substrate materials for specific environmental needs and can optimize coating performance for multi-wavelength applications. All custom mirrors undergo multi-stage strict quality inspection, including reflectivity measurement, surface flatness verification, parallelism testing and LIDT assessment, with a detailed quality report provided to ensure compliance with your design specifications.

Quality Assurance and Technical Support: 

Your Trusted Choice Backed by advanced optical manufacturing technology and a complete quality control system, Ultraopto ensures stable batch supply and consistent product quality. Our production processes adhere to international high-precision optical component standards, with each planar reflector subjected to rigorous testing using interferometers and spectrophotometers. We provide professional technical consultation on mirror selection, system integration and environmental requirements, as well as long-term after-sales support to address your application challenges. Note that the manufacturing and inspection process for this ultra-high precision mirror requires a longer production cycle, and we recommend consulting our team in advance for lead time details.

For more detailed technical parameters, product quotation information or custom design solutions for our Ultraopto 99.999% Planar Reflector, please contact our professional sales and technical team through the official website. We will provide you with efficient, personalized and professional optical solutions.