The Planewave IRDK20 exemplifies a sophisticated 20-inch infrared-optimized optical tube, meticulously designed under the Dall-Kirkham optical configuration. In this innovative design, there are no refractive lenses; instead, the optical system exclusively relies on reflective components. Specifically engineered for infrared (IR) applications, the reflective coatings boast a protected gold composition, ensuring exceptional reflectivity exceeding 98% across a broad spectrum from 0.65 microns (650nm) to 5 microns (5000nm). This makes the IRDK20 an optimal choice for demanding fields such as infrared astronomy and LIDAR applications.

The optical tube features fused silica mirrors, chosen for their superior thermal stability, minimizing the impact of temperature variations. With a focal length of 3,454 mm (f/6.8), the IRDK20 offers a balanced configuration suitable for a range of infrared imaging applications. The Dall-Kirkham design, coupled with coatings optimized for infrared wavelengths, ensures high-quality imaging performance.

Notably, the IRDK20 is equipped for Delta-T dew prevention, addressing a common challenge in observational settings. This feature underscores the practical design considerations incorporated into the optical tube, ensuring optimal performance in varying environmental conditions.

Recognizing the diverse needs of astronomers and researchers, the IRDK20 offers flexibility with the option for ultraviolet (UV) optimization. Those interested in UV optimization are encouraged to engage with our technical sales team for personalized discussions and tailored solutions.

The IRDK20 is a cutting-edge optical instrument, aligning advanced design principles with versatile features, making it an ideal choice for those engaged in the intricate realms of infrared astronomy, LIDAR applications, and beyond.

• The IRDK20 is a 20-inch optical tube meticulously designed for infrared applications, featuring fused silica mirrors.
• It boasts a focal length of 3,454 mm (f/6.8), embodying a Dall-Kirkham optical design. The coatings are precisely optimized for efficient transmission in infrared wavelengths, and for added versatility, ultraviolet optimization is also available.
• Tthe IRDK20 comes equipped with built-in features for Delta-T dew prevention, ensuring optimal performance in various environmental conditions.

Fused Silica stands as a remarkable synthetic amorphous silica glass renowned for its unparalleled purity and exceptional transparency. It outshines other types of glass in terms of optical and thermal properties, thanks to its inherent purity. The transmission and homogeneity of fused silica surpass even crystalline quartz, all while avoiding the temperature instability challenges associated with the crystalline form.

The coefficient of thermal expansion of fused silica is a mere one-sixth that of Borosilicate (Pyrex) glass. This characteristic imparts a unique advantage—when fused silica undergoes cooling, it remarkably retains its shape with an impressive level of accuracy. This attribute ensures consistent optical performance and a steadfast focus, irrespective of temperature fluctuations. The superior stability of fused silica over various temperature ranges makes it an ideal choice for applications demanding precision, reliability, and minimal optical distortion.

With an exceptionally high melting temperature, exceeding approximately 1,600 degrees Celsius, fused silica exhibits robustness in extreme conditions. Its resistance to thermal shock further reinforces its suitability for professional observatories and a diverse array of scientific applications. The enduring popularity of fused silica in these realms is a testament to its reliability, ensuring that it remains the material of choice for those who prioritize consistent, high-performance optics in the face of challenging environmental conditions.