two axis electro optical infrared

Infrared Optics for the Two-Axis Revolution

  • Friday, 02 August 2024
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Infrared Optics for the Two-Axis Revolution

As a key component of many optical systems, infrared (IR) optics enable the collection, focus or collimation of light in specific wavelength ranges.infrared optics: two-axis revolution The IR spectrum is commonly divided into three distinct regions: the near-infrared (NIR), the short-wave infrared (SWIR) and the long wave infrared (LWIR). Each of these spectral bands requires its own unique set of optical elements for proper operation.

Like visible wavelengths, the IR spectrum consists of a wide range of optical materials that may be used to fabricate optics.infrared optics: two-axis revolution However, there are some major differences between the IR and visible light that can be leveraged to improve system performance. Infrared materials have higher transmission, lower index of refraction and less dispersion than their visible counterparts. These attributes can be manipulated through coating and substrate selection to provide the optimal optics for a given application.

While many IR optical substrates are fabricated from common, industrially-grade materials such as fused silica and BK7, it’s important to keep in mind that the specific material chosen for an IR component can make or break its overall performance.infrared optics: two-axis revolution Choosing the best IR substrate can dramatically increase an optical device’s durability, longevity and sensitivity to temperature fluctuations. This is especially true for IR applications, where a substantial amount of heat can be generated and the substrate will be exposed to large variations in temperature over time. The IR-optical materials with the lowest index gradient and coefficient of thermal expansion are magnesium fluoride and sapphire.

Other important considerations when selecting an IR substrate include its mechanical properties, chemical and laser-etch resistance, and environmental hazard.infrared optics: two-axis revolution For instance, some IR optical materials such as cadmium telluride, lead telluride and various arsenic compounds contain toxic substances that are a concern in terms of both environmental safety and ROHS compliance. These compounds are firmly bound to the glass or crystal, so they don’t pose a threat during normal use, but can be problematic in the event of improper disposal at the end of their life cycle.

The most common IR optical substrates, including fused silica, MgF2, YAG and sapphire are all highly durable, etch resistant, and have very low index of refraction. Moreover, these substrates can be coated with antireflective (AR) coatings to enhance a system’s performance.

Precision molded infrared optics are available for applications requiring high-volume production. This manufacturing method is ideal for a variety of spherical, aspherical and diffractive lens geometries. Syntec Optics has a state-of-the-art metrology department to ensure that each of our infrared optics is fabricated to exacting specifications. This level of quality control is crucial in a field where tolerances can be tight and the cost of failures can be expensive. In addition, precision molding allows us to offer a lower price point than machined or cast components while still providing the same quality and accuracy. We can produce finished, spherical and aspheric IR optics in bulk or as part of larger optical assemblies. Contact us today to learn more about our custom IR optics and how they can benefit your organization.

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