PlaneWave 12.5 inch Dall-Kirkham Optical Tube Assembly

PlaneWave 12.5 inch Dall-Kirkham Optical Tube Assembly
  • $13,800.00

 


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 12.5 inch (318 mm)
Focal Length 2541 mm (100.04 inch)
Focal Ratio f/8
Central Obstruction 42% of the Primary Mirror Diameter
Back Focus from Mounting Surface 10.445 inch (265 mm)
Back Focus from Racked in Focuser 7.2 inch (183 mm)
Weight 48.5 lbs (22.0 kg)
Optical Tube Carbon Fiber
Overall Dimensions 35 inch (889mm) long X 15.5 inch (394mm) wide X 17.2 inch (437mm) high
PlaneWave Primary Mirror
Diameter 13 inch (330 mm)
Aperture 12.5 inch (318 mm)
Focal Ratio f/3
Mounting Laser Collimated and Permanently Fixed
Material Precision Annealed Pyrex
Shape Prolate Ellipsoid
Coating IR or UV optimized
PlaneWave Secondary Mirror
Diameter 4.65 inch (118 mm)
Material Precision Annealed Pyrex
Shape Spherical
Coating IR or UV optimized
PlaneWave Standard Features
Design Carbon fiber tube design that minimizes thermal expansion which causes focus shift with changes in temperature
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
Hedrick Focuser 2.75 inch Hedrick heavy duty no-slip focuser. The focus tube runs on 5 bearings and is driven by a leadscrew so there is no chance of slipping. It accepts an optional dial indicator and PlaneWave’s EFA Kit to control many electronic accessories. The draw tube travel is 1.3 inch.
Cooling Fans Three fans blow out of the optical tube pulling air though the telescope and by the primary mirror. This helps the telescope to reach thermal equilibrium quickly. The fans are controlled by a switch on the optical tube or can be conrolled by a computer if the optional Electronic Focus Accessory (EFA Kit) is purchased.
PlaneWave Shipping
Crated Shipping Weight 163 lbs (73.9 kg)
Crate Dimensions 23 inch (584 mm) wide X 31 inch (787 mm) high X 41 inch (1,041 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 OTA cover is for closing the front of the tube to protect the primary mirror and the inside of the optical tube.
PlaneWave Thumb Drive For Collimation and Spacing
12VDC Power Supply (18778) Provides power for the fans (Not included for European Orders)
Wrench Set (5812A35) English Hex Wrenches (European Orders Only)