Optical Components are manufactured from a wide range of substrates, and the very materials they're fabricated from dictates their suitability for specific tasks. Here, Knight Optical – the leading supplier of metrology-tested, custom-made optics – explores some of the most common substrates that are used for IR applications on its books and lists some of their typical uses.
Sapphire (Al2O3)
When thinking of sapphire, many may summon images of the delicate, precious deep-blue tones of elegant rings, earrings, and necklaces. However, when it comes to optical components, Sapphire, also known as Al2O3, substrates really pack a punch.
Produced synthetically for optical purposes, Sapphire is tough, boasts chemical resistance and features high transmission and thermal conductivity. It's also the second hardest crystal available (after diamond) and is, therefore, a sought-after substrate for many engineers, designers, and manufacturers looking for durable optics for their applications