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PlaneWave Instruments CDK14 Optical Tube Assembly

PlaneWave Instruments CDK14 Optical Tube Assembly
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Price:  Please Call to Confirm the Price(Inc. 20% VAT)

Product Code:  PW140101
Manufacturer:  Planewave
Telescope Type:  Corrected Dall-Kirkham
Aperture (mm):  356 mm


The PlaneWave Instruments CDK14 is a 14 inch (0.36 m) f/7.2 Corrected Dall-Kirkham Astrograph telescope. The CDK14 covers a 70 mm field of view without any field curvature, off-axis coma, or astigmatism. The CDK14 is a lightweight carbon-fiber truss design weighing less than 50lbs, with 3 cooling fans blowing air throughout the back of the telescope. The CDK optical design is the innovative solution for unsurpassed astro-imaging quality at an affordable price.

The CDK (Corrected Dall-Kirkham) Optical Design is an innovative solution for unsurpassed astroimaging quality at an affordable price. The CDK telescope design provides excellent imaging with large format CCD cameras while remaining superb for visual use. The CDK design far exceeds the off-axis performance of most commercial telescope designs including the Ritchey-Chretien design.
This no-compromise design is unique in making the optical alignment forgiving and collimation very easy. This guarantees the user the best possible performance from the telescope. The end result at the image plane of the CDK design is no off-axis coma, no off-axis astigmatism,
perfectly flat field (no off-axis defocus). The CDK design will give you pinpoint stars from the center to the corner of the field of view.

Features:

 

Carbon Fiber Truss Design: Open truss tube design with carbon fiber frame minimizes thermal expansion which causes focus shift with changes in temperature. Carbon fiber truss design also promotes quick thermal cooling and provides a rigid, lightweight structure.

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.

Dovetail Expansion Joint: 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: Three cooling fans blow air inside the back of the telescope. Internal diverting fins circulate air flow behind the mirror for even cooling to help the telescope reach thermal equilibrium quickly. The fans are controlled with PWI PC software with the optional Electronic Focus Accessory (EFA Kit).

Delta-T Ready: For added dew prevention, the CDK14 is internally wired with polyimide film heater pads and temperature sensor, ready to be controlled with the optional Delta-T controller.

OPTICAL SYSTEM

Optical DesignCorrected Dall-Kirkham (CDK)
Aperture14 inch (356mm)
Focal Length2563mm (101 inch)
Focal ratioF/7.2
Central Obstruction23.5% by surface area; 48.5% by diameter
Back Focus from Mounting Surface11.09 inch (282 mm)
Weight48 lbs (22 kg)
OTA Length35 inch (889 mm)
Optical Performance3.1 micron RMS at 13mm off-axis; 6.0 micron RMS at 35mm off-axis - Spot Diagram
Upper CageCarbon Fiber Truss
Lower CageCarbon Fiber Truss and Light Shroud
Optimal Field of View70mm Image Circle

 

PRIMARY MIRROR

Diameter14.1 inch (358 mm)
Aperture14 inch (355.6 mm)
Focal ratioF/3.26
MountingLaser Collimated and Permanently Fixed
MaterialPrecision Annealed Borosilicate
ShapeProlate Ellipsoid
CoatingEnhanced Aluminum - 96%

 

SECONDARY MIRROR

Diameter165 mm (6.5 inch)
MaterialPrecision Annealed Borosilicate
ShapeSpherical
CoatingEnhanced Aluminum - 96%

 

LENS GROUP

Diameter95mm (3.7 inch)
Number of lensesTwo
Coatingbroadband AR Coatings (less than .5% reflected from 400 to 700nm)

 


STANDARD FEATURES

CDK OpticsThe Corrected Dall-Kirkham design yields a perfectly flat field free from off-axis astigmatism, coma and defocus.
Carbon Fiber Truss DesignMinimizes thermal expansion which causes focus shift with changes in temperature
Dovetail Expansion JointAllows 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 FansThree cooling fans blow air inside the back of the telescope. This helps the telescope to reach thermal equilibrium quickly. The fans are controlled by a computer if the optional Electronic Focus Accessory (EFA Kit) is purchased.
Delta-T ReadyFor added dew prevention, the CDK14 is internally wired with polyimide film heater pads and temperature sensor, ready to be controlled with the optional Delta-T controller.

 

SHIPPING

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

 

INCLUDED ACCESSORIES

Ronchi Spacer (600341 & 600344)This spacer sits in place of a focuser and 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 OcularThis ocular is a Ronchi screen used for setting the primary to secondary spacing
Primary Mirror CoverThe Primary Mirror Cover protects the primary mirror
Planewave Thumb DriveContaining all documentation and software for collimation and spacing
12VDC Power SupplyProvides power for the fans (Not included for European Orders)
Wrench Set (5812A35)English Hex Wrenches (European Orders Only)

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