Bespoke Ordering Available
Knight Optical offers high-quality KRS-5 windows and optical components, using the unique properties of KRS5 (Thallium Bromo-Iodide). This material is renowned for its excellent transmission capabilities in the deep infrared range, making it a preferred choice for spectroscopic and other IR applications.
Our KRS5 glass is created to meet diverse optical needs, ensuring excellent performance in environments requiring precise infrared transmission.
We understand the importance of material quality and optical precision. Our KRS 5 windows are available in various dimensions and can be custom-made to fit your specific requirements. Additionally, the KRS-5 refractive index is thoroughly considered in the design of each component, ensuring optimal performance in your optical systems.
For applications requiring unique specifications, we offer custom solutions, including Thallium Bromo-Iodide components, specifically for your exact needs. Whether you need anti-reflective coatings or specific geometric configurations, our team can provide KRS5 glass and KRS-5 crystal components that meet your project’s demands.
Speak to our experts about your Custom KRS-5 needs today
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Optical Properties of KRS5
Leveraging our extensive experience and state-of-the-art metrology lab, we ensure that each KRS-5 window and optical component meets Knight Optical’s high standards for quality and performance. Our commitment to excellence and customer satisfaction makes us an excellent provider in the optical industry, ready to support your projects with precision-made KRS5 and Thallium Bromoiodide components.
Discover how our KRS-5 optical components can enhance your optical systems by contacting our expert team today. Below is a brief summary of KRS5’s optical properties, a full data sheet is available here.
| Transmission Range | 0.6 to 40µm |
|---|---|
| Refractive Index | 2.371 @ 10µm |
| Density | 7.371 g/cm3 |
| Melting Point | 414.5°C |
| Hardness | Knoop 40.2 |
| Diameter | < 5mm to 50mm |
|---|---|
| Form error (@633nm) | < 0.25 waves |
| Centration/parallelism | < 1 arc minute |
| Scratch/dig | < 40/20 |
| Typical coatings | BBAR @ 2-40µm, DLC @ 2-40µm |
Frequently Asked Questions
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What is KRS5 used for in optical components?
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KRS5, also known as Thallium Bromo-Iodide, is widely used in infrared and multispectral applications due to its high refractive index and broad transmission range. It is particularly useful in IR spectroscopy, thermal imaging, and other IR applications due to its excellent transmission properties from the visible wavelengths up to the far-infrared range.
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What are the main properties of a KRS5 Crystal?
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A KRS5 crystal is known for its high refractive index and wide transmission range, which makes it suitable for infrared and multispectral system components. Additionally, KRS5 is non-hygroscopic, making it stable and usable in various environmental conditions without degradation.
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Can KRS 5 Window be used in high moisture environments?
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Yes, KRS5 windows can be used in high moisture environments as KRS5, or Thallium Bromo-Iodide, is non-hygroscopic. This means it does not absorb water easily, making it ideal for applications where moisture is present.
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What distinguishes KRS5 Glass from other infrared materials?
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KRS5 glass stands out due to its wide infrared transmission range and high refractive index. Unlike other infrared materials, KRS5 can transmit infrared light up to far-infrared wavelengths, making it highly valuable for a broad range of IR applications.
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What is the refractive index of KRS-5, and why does it matter?
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The KRS-5 refractive index is significantly high, which is crucial as it affects the bending of light passing through the material. This property makes KRS5 particularly suitable for high-performance infrared optics where precise light manipulation is necessary.
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How does Thallium Bromo-Iodide perform compared to other IR materials?
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Thallium Bromo-Iodide, or KRS5, performs exceptionally well compared to other IR materials due to its extensive transmission range and ability to operate effectively across a wide range of temperatures and environmental conditions. This makes it a preferred choice for challenging infrared applications where high optical performance is required.
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Additional Information
High Chemical Resistance
KRS5 is non-hygroscopic with a high chemical resistance against strong acids. It is manufactured by the sealed-ampoule Stockbarger technique, with a high-purity starting material to remove the possibility of absorption bands in the mid-IR region.
Cold Flow
KRS5 also tends to cold flow, meaning it slowly deforms in shape under mechanical stress and pressure.
Considerations
Health and Safety
KRS5 is toxic and must be handled with extreme care. Gloves should be worn, and hands washed thoroughly after handling the optics.
Typical Applications
Fourier Transform Infrared Spectroscopy (FTIR)
KRS5 is widely used as a substrate for ATR prisms due to its wide transmission band, low absorption, and high refractive index. It is also stable under normal atmospheric conditions. KRS5 is also used as transmission windows for liquid and gas samples.
Wire Grid IR Polarisers
Thallium Bromo-iodide is used as a substrate for wire grid IR polarisers. The grooves on the polarisers are manufactured using a holographic technique which can create submicron wire grid spacing. The grooves are filled with a metal deposit to create the wire grid. Wire grid IR polarisers polarise light from an unpolarised IR laser source, and attenuate light from a polarised source. These polarisers are used in a variety of applications including FTIR spectroscopy, medical imaging, and aerospace.
Athermalised imaging systems
KRS5 can be used in conjunction with germanium to correct for thermal defocusing within a system. It will often be used as a triplet along with another infrared material, such as zinc sulphide, to correct for the chromatic aberration that KRS5 can introduce.
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With our in-house state-of-the-art metrology laboratory you can be confident that your optical components will meet your requirements. You can find out more about our testing facilities here.
Operating for over 30 years
Knight Optical has been operating for over 30 years, with our managing director Colin Overton at the helm. Over this time, we have become a global leader in the production and distribution of scientific optical components and bringing quality into focus for all of our products and services that we provide.
Our Catalogue
Inside Knight Optical’s catalogue you’ll find details of the industries we serve as well as the many other services we can offer. It also showcases hundreds of our most popular products, supported by useful technical information, to help you choose the right part for your application.
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