PlaneWave 24 Inch Dall-Kirkham Optical Tube Assembly

PlaneWave 24 Inch Dall-Kirkham Optical Tube Assembly
  • $55,000.00

 


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.

PlaneWave System
Aperture 24 inch (610 mm)
Focal Length 3962 mm (155.98 inch)
Focal Ratio f/6.5
Central Obstruction 47% of the Primary Mirror Diameter
Back Focus from Mounting Surface 14.1 inch (358 mm)
Back Focus from Racked in Focuser 5.81 inch (148 mm)
Weight 240 lbs (108.9 kg)
Upper Cage Carbon Fiber Truss
Lower Cage Carbon Fiber Truss with Aluminum Light Shroud
Optimal Field of View 70 mm (58 arcminute)
Overall Dimensions 56 inch (1,422 mm) long X 31 inch (787 mm) wide X 35 inch (889 mm)
PlaneWave Primary Mirror
Diameter 24.5 inch (622 mm)
Aperture 24 inch (610 mm)
Focal Ratio f/3.2
Mounting Laser Collimated and Permanently Fixed
Material Precision Annealed Borosilicate
Shape Prolate Ellipsoid
Coating IR or UV optimized
PlaneWave Secondary Mirror
Diameter 9.45 inch (240 mm)
Material Precision Annealed Borosilicate
Shape Spherical
Coating IR or UV optimized
PlaneWave Standard Features
Design Carbon fiber truss design that minimizes thermal expansion which causes focus shift with changes in temperature.
Light Shroud Lower light shroud that protects the primary mirror from damage and stray light
Dovetail Expansion Allows for the difference in thermal expansion between carbon fiber and aluminum. The expansion joint allows the aluminum dovetail expand and contract without stressing the carbon fiber lower truss
Cooling Fans The CDK24 has two different cooling schemes. First there are three fans behind the primary mirror that blow air out of the optical tube pulling air though the telescope and by the primary mirror. This helps the telescope to equilibrate quickly. The second scheme is that there are 8 fans placed around the face of the primary mirror to equilibrate the face of the mirror and to keep a laminar air flow above the telescope’s light path. The two schemes can be controlled separately with the included switches on the optical tube or can be controlled by a computer if the optional Electronic Focus Accessory (EFA Kit) is purchased.
PlaneWave Shipping
Crated Shipping Weight 500 lbs (226.8 kg)
Crate Dimensions 40 inch (1,016 mm) wide X 48 inch (1,219 mm) high X 78 inch (1,981 mm) long
PlaneWave Included Accessories
Ronchi Spacer (200354) This spacer is used for setting the primary to secondary spacing. It has an 1-1/4 inner diameter and may be used with 1-1/4 oculars for collimation.
Ronchi Ocular This ocular is a Ronchi screen used for setting the primary to secondary spacing.
Primary Mirror Cover The Primary Mirror Cover protects the primary mirror.
PlaneWave Thumb Drive Includes instructions for Collimation and Spacing and software.
12VDC Power Supply (18778) Provides power for the fans (Not included for European Orders)
Wrench Set (5812A35) English Hex Wrenches (European Orders Only)