HR (High Reflectance) Laser Line Mirrors are specialized optical components designed to reflect a specific laser wavelength with exceptional efficiency. These mirrors consist of a substrate (e.g., BK7, fused silica) coated with multiple layers of dielectric materials, forming a Bragg reflector that maximizes reflectivity (typically >99.5%) at the target wavelength. HR Laser Line Mirrors are optimized for a fixed angle of incidence (AOI), usually 0° or 45°, and are critical in laser cavities, beam steering, and high-power laser systems where minimal energy loss is essential .
Parameter Information
Product: HR Laser Line Mirrors
Material: Fused Silica/BK7
Clear Aperture: >90%
Diameter Tolerance: +/-0.1mm
Bevel: Break sharp edges
Flatness (PV): <1/10L@633nm
Surface Quality: 10-5
Thickness Tolerance: +/-0.1mm
Features of HR Laser Line Mirrors
Ultra-High Reflectivity
HR coatings achieve reflectivity >99.5% at the specified wavelength (e.g., 532 nm, 1064 nm), minimizing energy loss and ensuring stable laser cavity performance .
Narrowband Performance
Designed for a narrow wavelength range (±5–10 nm around the central wavelength), HR mirrors provide precise spectral selectivity, ideal for single-line laser applications .
High Damage Threshold
Coatings are engineered to withstand high-power laser pulses (e.g., >12 J/cm² for 10 ns pulses at 1064 nm), making them suitable for industrial and scientific high-energy laser systems .
Low Scatter and Absorption
Advanced deposition techniques (e.g., ion beam sputtering) ensure smooth coating surfaces, reducing scatter and absorption to <0.1% .
Customizable Substrates
Available with BK7, fused silica, or UV-grade quartz substrates, HR Laser Line Mirrors can be tailored for specific environmental conditions (e.g., UV resistance, thermal stability) .
Applications of HR Laser Line Mirrors
Laser Cavities
HR mirrors are used as cavity end mirrors in solid-state lasers (e.g., Nd:YAG, Ti:Sapphire) to enhance laser output power and stability .
Beam Steering and Folding
In laser systems, HR mirrors direct laser beams around optical layouts, minimizing spatial constraints. For example, in laser cutting machines, HR mirrors guide high-power beams to the cutting head .
Optical Resonators
Critical in Q-switched lasers, HR mirrors enable efficient energy storage and release, enhancing pulse peak power .
Medical Laser Systems
Used in laser dermatology and ophthalmology devices to reflect high-energy pulses for tissue ablation or corrective surgeries .
Research and Development
In spectroscopy and quantum optics experiments, HR mirrors ensure precise control of laser paths and minimize signal loss .
FAQ of HR Laser Line Mirrors
Q: What is the difference between HR Laser Line Mirrors and broadband mirrors?
A: HR Laser Line Mirrors are optimized for a specific wavelength (narrowband), while broadband mirrors reflect a wider spectral range. HR mirrors are preferred when high reflectivity at a single wavelength is critical .
Q: Can HR mirrors be used at angles other than the specified AOI?
A: HR Laser Line Mirrors are designed for a specific AOI (e.g., 45°). Deviating from this angle may reduce reflectivity and increase polarization dependence. Custom designs can accommodate different AOIs .
Q: How do I clean HR mirrors without damaging the coating?
A: Use a lint-free cloth and optical-grade cleaning solution. Avoid harsh chemicals or abrasives. For stubborn residues, consult our technical support .
Q: What is the typical lifetime of HR coatings?
A: Under normal operating conditions, HR coatings can last for years. However, exposure to high humidity, dust, or extreme temperatures may degrade performance. Regular inspection and maintenance are recommended .
Why Choose Us
Advanced Coating Technology
Our HR Laser Line Mirrors utilize ion beam sputtering (IBS) and electron beam evaporation techniques to achieve uniform, durable coatings with industry-leading LIDT values .
Precision Manufacturing
Substrates are polished to λ/8 flatness (at 632.8 nm) and coated with tight wavelength tolerances (±1 nm), ensuring consistent performance across batches .
Extensive Testing
Each mirror undergoes rigorous testing for reflectivity, scatter, and LIDT, with certifications provided upon request. Our quality control protocols meet ISO 13694 standards .
Fast Prototyping
We offer rapid prototyping for custom HR Laser Line Mirrors, with lead times as short as 2 weeks for urgent projects .
Cost-Effective Solutions
By leveraging automated coating systems and bulk purchasing of raw materials, we provide HR Laser Line Mirrors at competitive prices without compromising quality .
