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IRDK20 Dall-Kirkham f/6.8

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Price: € 43,950.00
(Price incl. German VAT excl. shipping)
Price: € 36,932.77
(Price excl. German VAT excl. shipping)

PlaneWave IRDK20 Dall-Kirkham f/6.8

This is a Dall-Kirkham optical design with coatings that are optimized to transmit in infrared or ultra violet wavelengths. It is diffraction limited across a 20mm image circle at the focal plane. There are no refractive lens, only reflective components to the design. For IR application, reflectives 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 also be used at an additional cost.

The DK is available in the three different apertures 24 ", 20", 28" and 12,5".

The PlaneWave IRDK 20 is available in various types of mirror material. Standard mirror material is borosilicate. The telescope is also available in fused silica optics

  • IRDK 20 Astrograph, 20 inch Infrared optimized with Fused Silica
  • a Dall-Kirkham optical design with coatings that are optimized to transmit in infrared or ultra violet wavelengths
  • 8" Dovetail, focal length 3.454 mm (f/6,8)
  • Delta T Ready, 3,5" Hedrick Focuser and EFA Kit separately available

 

Fused Silica

Specifications

Optical Design
Dall-Kirkham
Aperture (mm)
20" (508 mm)
Focal Length
3.454 mm (135.98 inch)
Focal Ratio
f/6.8
Image Field
52 mm
Back Focus Distance
8.9" (226 mm) from Mounting Surface, 5.81" (147 mm) from Racked in Focuser
Central Obstruction
39% of the Primary Mirror Diameter
Substrate
Fused Silica
Optical length
47 inch (1.194 mm)
Optical Tube Weight
140 lbs (64 kg)
Mount
No mount (OTA only)
Manufacturer SKU
200120Q
SKU
1323220IQ
EAN Code
4047825035035

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