Protected Silver Mirror
Protected Silver Mirror
Main Highlights
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Glass: High-quality float (60/40 quality)
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Size: From 1 inch to max 4 inches
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Shape: Circular / Rectangular
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Thickness: 1 to 3 mm
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Coating: Single-side coating with excellent adhesion
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Reflection: 98% in the range of 400 to 700 nm
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Quality of Silver: 99.999% ( Ultra Purity)
- Highly Reflectivity
- Robust Stability
Details and Specifications Protected Silver Mirror
Protected Silver mirrors have a thin layer of dielectric material added to the Silver (Ag) layer. The dielectric layer shields the Silver from oxidation. This helps prevent the mirror from losing its reflectivity as time passes.
It has the highest reflectance in the visible-NIR spectrum compared to other metallic mirrors. They also reflect well in the IR range. The research and development labs often use reflective materials that are strong and long-lasting. These materials are commonly found in things like laser optics, telescope mirrors, and solar cells.
The dielectric layer is made of materials like silicon dioxide or magnesium fluoride. These materials bend light more than air because they have a high refractive index. When light bends, it keeps the Silver layer safe from rust because oxygen can’t reach the surface of the Silver.
It is produced by using the vacuum deposition method. The Silver and dielectric layers are added to the mirror in a vacuum chamber during this process. The vacuum chamber prevents oxygen molecules from reaching the mirror’s surface, which helps ensure that the Silver layer is not oxidized.
Technical Specification
| Product Name | Protected Silver Mirror |
| Mirror Material | High-quality float glass (60/40 quality, as specified on the product page) |
| Reflective Coating | Silver (Ag) |
| Silver Purity | 99.999% (ultra-high purity, as specified on the product page) |
| Protective Layer | Silicon dioxide (SiO₂) protective overcoat |
| Protective Overcoat Thickness | Approximately 100 nm |
| Coating Method | Vacuum deposition |
| Coating Configuration | Single-sided coating |
| Reflectance in Visible Range | 98% over 400–700 nm, as stated in the product highlights |
| Average Reflectance (Ravg) | >97% over 450 nm–2 µm |
| Average Reflectance in Infrared Range | >95% over 2–20 µm |
| Available Shapes | Round, square and rectangular; confirm the required shape and dimensions |
| Size Range | Listed as 1–4 inches in the product highlights, with a maximum size of 100 mm in the properties section |
| Thickness | 1–3 mm |
| Key Features | High reflectivity, protective overcoat, broad spectral reflectance and improved resistance to silver oxidation |
| Applications | Laser optics, telescope mirrors, solar energy systems, optical research and other reflective optical assemblies |
| Customization | Custom dimensions and protective coating requirements can be discussed with Techinstro |
Properties Protected Silver Mirror
Reflectivity:
- Ravg > 97% for 450 nm – 2 µm
- Ravg > 95% for 2 – 20 µm
Protective Overcoat: SiO2 layer, with an approximate thickness of 100 nm, protects the Silver coating from oxidation and degradation.
Mirror Shapes: It is available in Round, Square, and Rectangular with a max size of 100mm.
Broad Bandwidth Reflectors: Metallic-coated mirrors offer very broad bandwidth reflectance. The dielectric layer protects the soft metallic coating from scratching and oxidation.
Features
High reflectivity in the visible and NIR spectrum: It has the highest reflectance in the visible-NIR spectrum. It is essential for applications such as laser optics and telescope mirrors.
Durability: A protective layer protects the Silver from oxidation and is more durable than mirrors that do not have a dielectric layer.
Wide spectral range: It can reflect light over a wide spectral range, from the visible to the infrared. It is versatile for a variety of applications.
Customizable: It can be customized to meet specific requirements and adjust the protective layer thickness to optimize the reflectivity at a particular wavelength.
Cost-effective: It offers high reflectivity and durability while being more affordable than other mirrors.
Adjustable in variety of environments: It can be used in various environments, including high-humidity and high-temperature environments.
Easy to clean: It is easy to clean with a water solution.
Long lifespan: It has a long lifespan, with some mirrors lasting over 20 years.
Protected Silver Mirror vs Other Mirror Types
| Comparison Parameter | Protected Silver Mirror | Unprotected Silver Mirror | Aluminum-Coated Mirror | Dielectric Mirror |
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| Reflective Coating | Silver with a protective dielectric overcoat | Silver without a protective overcoat | Aluminum coating | Multiple dielectric coating layers |
| Reflectivity Characteristics | High reflectance across the visible and infrared ranges, depending on the coating design | High reflectance in suitable spectral ranges, depending on the silver coating | Useful across selected UV, visible and infrared applications, depending on the design | Very high reflectance over a specifically designed wavelength band |
| Oxidation Protection | Protective overcoat helps shield silver from oxidation and degradation | Silver surface is more exposed to environmental degradation | Depends on the aluminum coating and any protective overcoat | Depends on the dielectric stack and environmental design |
| Spectral Coverage | Broad visible-to-infrared coverage, according to the specified coating performance | Broad spectral coverage is possible, but surface protection is limited | Suitable spectral range depends on coating specifications | Generally optimized for a defined wavelength range and angle of incidence |
| Durability | Protective layer improves resistance to oxidation and handling-related degradation | Requires careful handling and environmental protection | Varies with coating design and protection | Varies with coating design, substrate and environmental conditions |
| Customization | Dimensions, shapes and coating requirements can be discussed | Depends on supplier and coating process | Depends on supplier and coating process | Depends on the required wavelength and coating design |
| Typical Applications | Laser optics, telescopes, solar energy systems and optical research | Optical assemblies where an unprotected silver surface is appropriate | General optical reflectors and applications requiring aluminum coatings | Laser systems and optical assemblies requiring wavelength-selective high reflectance |
| Best Selection Criteria | Broad reflectance, silver coating protection and application-specific dimensions | Reflectance requirements where protective coating is not required | Required spectral range, reflectance and environmental conditions | Target wavelength, angle of incidence and required reflectance band |
Note: The comparison is general. Actual reflectance, durability and wavelength performance depend on the coating design, substrate and operating conditions.
Why Choose Techinstro Protected Silver Mirror?
Techinstro Protected Silver Mirrors combine a highly reflective silver coating with a protective dielectric overcoat. Designed for optical applications requiring high reflectance and improved coating protection, these mirrors can be considered for research laboratories, optical systems and solar energy applications.
- High Reflectivity: The silver coating provides high reflectance across the specified visible and infrared wavelength ranges, supporting a variety of optical applications.
- Protective Dielectric Overcoat: The protective layer helps reduce silver oxidation and coating degradation, supporting longer-lasting optical performance.
- High-Purity Silver: The product page specifies 99.999% silver purity for the reflective coating.
- Broad Spectral Performance: Published reflectance specifications cover the visible range and extend into the infrared, subject to the supplied coating design.
- Vacuum Deposition Process: The silver and protective coating layers are deposited using a vacuum deposition process.
- Multiple Shapes and Sizes: Round, square and rectangular options are described on the product page. Confirm the required dimensions when ordering.
- Multiple Thickness Options: The listed glass thickness range is 1–3 mm, subject to availability and configuration.
- Optical Research Applications: Suitable application areas include laser optics, telescope mirrors, solar energy systems and optical research.
- Customization Support: Discuss application-specific dimensions and coating requirements with the Techinstro team.
- Technical Assistance: Techinstro states that its experienced team can help customers select a suitable mirror for their application.
Contact our expert with your required wavelength range, reflectance target, mirror dimensions, substrate thickness and intended application to identify a suitable Protected Silver Mirror configuration.
Applications of Protected Silver Mirror
Protected Silver Mirror (PSM) applications include laser optics, telescope mirrors, and solar cells. In laser optics, PSMs are used because they can reflect a high percentage of laser light. This is important for applications such as laser cutting and laser welding.
Telescope mirrors are used because they reflect a high percentage of light from stars and other astronomical objects. This is important for applications such as astronomy and space exploration. This mirror is used in solar cells because it can reflect a high percentage of sunlight. It is also important for applications such as solar power generation.
It is a valuable tool for various applications, offering high reflectivity, durability, and a wide spectral range, making them ideal for use in demanding environments.
Safety instructions
- Always wear gloves when handling Protected Silver Mirrors. This will help prevent fingerprints and other contaminants from getting on the mirror, reducing its reflectivity.
- Do not touch the mirrored surface or edges of the mirror with bare hands. This can damage the protective coating and expose the Silver to oxidation.
- Store it in a cool, dry place. This practice will help to prevent the protective coating from degrading.
- Avoid exposing the mirror to high humidity or temperatures to prevent damage to the protective coating.
- If the mirror becomes dirty, clean it with a mild soap and water solution. Do not use harsh chemicals, as these can damage the protective coating.
How to use ?
- Choose the correct mirror for the application. It is available in various sizes, shapes, and coatings.
- It is delicate and can be easily scratched or damaged. Be sure to wear gloves when handling the mirror and avoid touching the mirrored surface.
- Store the mirror properly. The mirror should be stored in a cool, dry place. Avoid exposing the mirror to high humidity or temperatures.
- Clean the mirror as needed. Clean the mirror with a mild soap and water solution if the mirror becomes dirty. Do not use harsh chemicals, as these can damage the protective coating.
Why choose us?
Techinstro manufacture and supply Protected Silver Mirrors with over ten years of market experience. We offer a wide variety of metal coated mirrors, and our team of experienced professionals can help our customers choose the correct mirror for their application. Our prices are competitive, our turnaround times are fast, and we are confident that our clients will be satisfied with our products. If the client would like to know more about the products, please do not hesitate to contact us today.
FAQ's
It is a silver-coated mirror with a thin dielectric layer on top that stops the silver from oxidizing and losing reflectivity.
An SiO₂ overcoat about 100 nm thick keeps oxygen and moisture away from the silver layer.
Average reflectance is above 97% from 450 nm to 2 µm and above 95% from 2 to 20 µm.
We use 99.999% ultra-pure silver for the coating.
We apply the coating to one side of high-quality float glass (60/40 quality).
Sizes range from 1 inch to 4 inches (up to 100 mm).
The mirror is available in round, square, and rectangular shapes.
Thickness options range from 1 mm to 3 mm.
Yes, reflectance stays above 95% up to 20 µm, so it works well in IR optics and spectroscopy.
It is used in laser optics, telescopes and imaging systems, spectroscopy, solar-energy setups, and other optical instruments.
Yes, the protective layer thickness can be tuned to boost reflectivity at a chosen wavelength.
Wear gloves, avoid touching the coated surface, and clean it only with a mild soap-and-water solution.
Store it in a cool, dry place away from heat and humidity; it can last over 20 years.