Cloud Break Optics

IRDK20 (Infrared Optimized)

IRDK20 (Infrared Optimized) - Main image
$27900 $45000 In stock

Category: Catadioptric Telescopes

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The IRDK20 is a 20-inch infrared optimized optical tube designed for research applications where on-axis performance is crucial.

  • Dall-Kirkham optical design
  • Focal length of 3,454 mm (f/6.8)
  • Mirror coatings that are optimized to transmit in infrared wavelengths (ultra violet optimization available)
  • Fused silica mirrors with low thermal expansion
  • Ready for Delta-T dew prevention

Description

This is a Dall-Kirkham optical design with coatings that are optimized to transmit in infrared wavelengths. There are no refractive lens, only reflective components to the design. For IR application, reflective coatings are a protected gold which give better than 98% reflectivity from .65 micron (650nm) to 5 micron (5000nm). This design is ideal for infrared astronomy or LIDAR applications. UV optimized coatings can be provided as well, so please reach out to our technical sales team to discuss UV optimization.

  • IRDK20 is a 20 inch infrared optimized optical tube with fused silica mirrors
  • Focal length of 3,454 mm (f/6.8)
  • Dall-Kirkham optical design with coatings that are optimized to transmit in infrared wavelengths (ultra violet optimization available)
  • Ready for Delta-T dew prevention
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Christopher I. ★★★★★

I was skeptical about the shipping process, but their team handled everything smoothly. The infrared optimization makes a noticeable difference when capturing deep-sky objects. This 20-inch tube delivers views that are simply breathtaking.

Madison ★★★★★

After years of hunting for a scope that can really pull in those faint hydrogen-alpha details, this 20-inch infrared-optimized tube finally delivers the deep contrast I was chasing. The lead time was a bit of a wait, but seeing the sharpness at f/4 made every day worth it.

Ella X. ★★★★★

The aperture is massive, but the infrared-optimized optics are what really sold me—deep-sky targets pop with clarity I didn’t expect from a tube this size. The shipping lead time was a bit of a wait, but they communicated every step, and the payoff when it arrived was worth it.

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