Name: Silver(Ag) Mirror
Rating: 4.5 (100 reviews)

Key Features

Structure

-Substrate: Usually optical glass (such as K9, fused silica, etc.), requiring a high surface finish and no defects. -Underlayer: Sometimes a layer of other metal (such as copper) is deposited first as a bonding layer to enhance the adhesion between the silver layer and the glass. -Silver Layer: The core functional layer, formed through physical vapor deposition (PVD).
Physical Vapor Deposition

Silver is heated and evaporated or sputtered onto the substrate in a high vacuum environment. This method can obtain a purer, denser, and higher-performance silver film for use in high-end optics.
Protective Layer

To overcome the problem of silver's easy oxidation, one or more protective films must be covered on top of the silver layer. Dielectric Protective Film: In the optical field, a transparent, chemically stable dielectric thin film, such as SiO₂ (silicon dioxide) or Al₂O₃ (alumina), is deposited. These films can effectively block moisture and corrosive gases, extending the life of the lenses.
Advantages

1. Highest reflectivity in the visible light range. 2. Extremely high reflectivity in the near-infrared band, superior to aluminum. 3. For the same reflectivity, silver mirrors can be made simpler (fewer layers) than dielectric film mirrors.

Specification of Silver(Ag) Mirror

Substrate material	K9(CDGM), Sapphire, Si, MgF2, N-BK7, N-BK10, Corining 7980, JGS1, Borofloat 33, ZnSe, ZnS, etc.	Surface Quality	60/40, 40/20, 20/10, 10/5
Dimension	6mm-350mm	Surface fringe	10(5)-3(0.5)
Thickness	0.5mm-30mm	Coating	Anti-reflection (AR) Coating or upon customer's request
Thickness	In general ±0.1mm, Best ±0.02mm	ECOPTIK annual production capacity	over 300,000 pcs

Typical Application Areas

High-end Optical Instruments

Such as high-precision interferometers, spectrometers, and research-grade telescopes, where extremely high light throughput is required.
Laser Optics

Particularly for laser resonator mirrors and reflectors of certain wavelengths, which require extremely high reflectivity to reduce losses.
Solar Energy

In concentrated solar power systems, where as much sunlight as possible needs to be reflected and focused onto the collector, silver mirrors are an ideal choice (usually with a robust outer protective layer).