Custom-made high-quality optics is a very particular field that only companies that are committed to superior design and manufacturing excellence can successfully do.
A.Optical Components Ltd. is a leading global company that precisely manufactures premium, high-grade, and custom-made optics that is used for various industrial purposes. The company is a trusted name in the medical and aerospace industry. The precision optical components that they manufacture are also used by the military industry for defense and homeland security.
A.Optical Components Ltd. is an ISO 9001 certified manufacturer, which means that they follow stringent and precise protocols to ensure optimum quality and accuracy. For the last 30 years, they have been doing special projects and turnkey solutions. Depending on the client’s needs, they have the flexibility to create just a prototype or do mass production. They also design and manufacture complex precision optics for UV, VIS, NIR, IR, and DIR optics.
Ultraviolet (UV) lenses are a type of optical lenses that have single or multiple elements that have been designed for maximum performance when used with an ultraviolet light. UV lenses use very specific substrates, anti-reflection coatings, or a combination of the two to maintain quality performance when operating below 400nn.
The principle behind single layer anti-reflection coating is quite simple: the substrate (glass) is coated with a thin layer of material so that reflections from the outer surface of the film and the outer surface of the substrate cancel each other by destructive interference. The two requirements to create an exact cancellation of reflected beams with a single layer coating are that the reflections are exactly 180 degrees out of phase and of the same intensity. There is a particular broadband anti-reflection coating that is designed for the ultra-violet region. It provides a low level of reflectivity less than 0.5% average from 275-425 nm. There are also customized coatings available for refractive indices of 1.46 to 1.90.
Most optical lenses that perform well in the ultraviolet spectrum will also perform in the visible (VIS), near-infrared (NIR), or infrared (IR) spectra. Anti-reflection coatings are also routinely available for any angle of incidence and any wavelength of about 1.6 microns in the infrared. It is usually inadvisable to request a coating for any wavelength greater than 1.6 microns because of the limitations on thickness. For anti-reflection coatings for the infrared spectrum (3000nm to 5000nm for mid-infrared) and far-infrared spectrum (8um to 12um), band averaged reflectance is less than 1.0 at normal incidence.
UV, VIS, NIR, IR, and DIR substrates are chemically resistant and will not degrade under normal conditions. They also have a low thermal expansion, which means that the optics can survive rapid temperature changes while maintaining their structural integrity.
Here are some of the materials used in infrared and ultraviolet optical systems:
* Silicon – Si
Silicon is a semiconductor material commonly used in infrared optical systems operating in the near-IR and MW spectral band. Silicon has the lowest density among common infrared materials, making it ideal for systems with weight constraint.
Silicon is primarily used as optical windows in the 3-5 micron region as a substrate for optical filters. Optical quality silicon is normally lighted doped (5 to 40-ohm-cm) and because it has a high refractive index it must be anti-reflection coated in order to achieve a high optical transmission.
* Calcium Fluoride – CAF2
Calcium Fluoride is used for optical purposes as windows, prisms and lenses, transmitting from the vacuum ultraviolet into the infrared. It is a physically and chemically stable optical material with good water and chemical resistance. Two qualities are manufactured, one for Visible and Infrared applications and the other specifically for Ultraviolet applications grown from chemically pure powder.