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IRDK14 (Infrared Optimized)

SKU# 140120Q

Price: $18,000.00


*Price is based on PlaneWave’s Pricing Policy

The IRDK14 is a 14-inch infrared-optimized optical tube designed for research applications where on-axis performance is crucial.

  • Dall-Kirkham optical design
  • Focal length of 2,563 mm (f/7.2)
  • Mirror coatings that are optimized to transmit in infrared wavelengths (ultraviolet optimization available)
  • Fused silica mirrors with low thermal expansion
  • Ready for Delta-T dew prevention


This is a Dall-Kirkham optical design with coatings that are optimized to transmit in infrared wavelengths. There are no refractive lenses, only reflective components to the design. For IR application, reflective coatings are a protected gold that gives 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.

  • IRDK14 is a 14 inch infrared optimized optical tube with fused silica mirrors
  • Focal length of 2,563 mm (f/7.2)
  • Dall-Kirkham optical design with coatings that are optimized to transmit in infrared wavelengths (ultraviolet optimization available)
  • Ready for Delta-T dew prevention

IRDK 14 Features

Carbon Fiber Truss Design


Minimizes thermal expansion which causes focus shift as temperature changes during an imaging session. Carbon fiber also reaches ambient temperatures quickly and is extremely lightweight and rigid to help ensure excellent imaging data is produced.

3D Printed Baffles


PlaneWave uses digital 3D printing technology to produce lightweight baffle tubes. 3D printers add successive layers of material to construct a baffle system with precision positioned internal stray light baffles to minimize vignetting and maximize image contrast. Quality baffling makes an incredible difference in overall image quality, so we ensured an optimal design was created for our telescopes.

Dovetail Expansion Joint


Allows for the difference in thermal expansion between carbon fiber and aluminum. The expansion joint allows the aluminum dovetail to expand and contract without stressing the carbon fiber lower truss. This results in images that are not distorted due to expansion, or contraction of the optical tube materials.

Delta-T Ready


For added dew prevention, the IRDK14 is internally wired with polyimide film heater pads and temperature sensor, which is ready to be controlled with the Delta-T via PlaneWave Interface 3 software.

Cooling Fans


Three fans on the backplate of the optical tube pull air through the telescope and by the primary mirror. These fans help the telescope reach thermal equilibrium quickly, further reducing any distortion in images due to temperature variations. The fans are controlled by a switch on the optical tube, or can be controlled by via PWI3 software if a PlaneWave Electronic Focus Accessory (EFA Kit) is purchased.



Optical System

Optical Design  Infrared Dall-Kirkham (IRDK)
Aperture 14 inch (356mm)
Focal Length 2563mm (101 inch)
Focal ratio F/7.2
Central Obstruction 23.5% by surface area; 48.5% by diameter
Back Focus from Mounting Surface 11.09 inch (282 mm)
Weight 48 lbs (22 kg)
OTA Length 35 inch (889 mm)
Optical Performance 3.1 micron RMS at 13mm off-axis; 6.0 micron RMS at 35mm off-axis
Upper Cage Carbon fiber truss
Lower Cage Carbon fiber truss and light shroud
Optimal Field of View 70mm image circle

Secondary Mirror

Diameter 165 mm (6.5 inch)
Material Fused silica (quartz)
Shape Spherical
Coating Gold Protected

Primary Mirror

Optical Diameter 14 inches (355.6)
Outer Diameter 14.5 inches (468.3mm)
Shape Prolate ellipsoid
Material Fused silica (quartz)
Coating Gold Protected


Crated Shipping Weight  225 lbs
Crate Width  31 inches
Crate Height  26 inches
Crate Length  53 inches

Included Items

Included Items

Heating elements for dew prevention The heating pads on the primary and secondary mirror require the 600195 Delta-T controller sold separately
OTA Cover To protect the primary mirror and inside of the optical tube
Flashdrive Contains software and instructions for collimation and spacing the primary to secondary mirror
Wrench Set (5812A35) Standard hex wrenches (European orders only)



For warranty information please check our Standard Warranty Page.