Al – Aluminium shows the highest reflectance in the UV. A reflection dip occurs around 850 nm due to phonon absorption. With a fluoride protection layer Al coatings can be optimized for use in the VUV.
Ag – Silver coatings give the highest reflectivity in the VIS and NIR. As they have low GDD in a broad wavelength area they can be taken as simple and low-priced mirrors for femtosecond lasers.
Au – Gold shows poor adhesion to glass and needs a bonding layer of chromium. It is often used in the far IR without a protection layer or as a solderable coating.
Other metal coatings are available too, e.g. chrome, chrome-nickel or platinum.
All values are given for standard coatings. Customized coatings available for all types.
Coating methods available:
Every coating type can be optimized
• substrate material
• reflection / transmis-
• angle of incidence
• GDD value
Alternatively we can create
a totally new design for you.