{"product_id":"planewave-cdk-14-inch-fused-silica-2","title":"PlaneWave CDK 14 Inch Fused Silica","description":"\u003ch5\u003e\u003cstrong\u003e\u003cspan style=\"color: #000000;\"\u003ePlaneWave CDK 14\" Fused Silica\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003eThe 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-Chrétien design.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch6\u003e\u003cstrong\u003eFUSED SILICA\u003c\/strong\u003e\u003c\/h6\u003e\n\u003cp\u003eFused Silica is a synthetic amorphous silica glass of the highest purity and one of the most transparent glasses made.\u003c\/p\u003e\n\u003cp\u003eThe optical and thermal properties of fused silica are superior to other types of glass due to its purity. Its transmission and homogeneity exceed those of crystalline quartz without the problems of temperature instability inherent in the crystalline form.\u003c\/p\u003e\n\u003cp\u003eFused Silica has a coefficient of thermal six times lower than Borosilicate glass, which means that as fused silica cools down, it preserves its shape to a high degree of accuracy. This translates into consistent optical performance and unchanging focus over temperature changes.\u003c\/p\u003e\n\u003cp\u003eWith high melting temperature (~1,600 degrees Celsius), a very low coefficient of thermal expansion and resistance to thermal shock, fused silica is the material of choice for professional observatories as well as various scientific applications.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003eThis 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.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #0000ff;\"\u003e\u003cstrong\u003e\u003ca style=\"color: #0000ff;\" href=\"\/wp-content\/uploads\/2019\/10\/PW-Optical-Design.pdf\"\u003eMore about our Optical Design\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch6\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/h6\u003e\n\u003ctable width=\"996\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"216\"\u003e \n\u003cp\u003e\u003cstrong\u003eCarbon Fiber Truss Design\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"465\"\u003eOpen 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.\u003c\/td\u003e\n\u003ctd width=\"315\"\u003e\u003cimg class=\"alignright size-full wp-image-59778\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/PW-CF-truss.jpg\" alt=\"\" width=\"720\" height=\"316\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"216\"\u003e\u003cstrong\u003e3D Printed Baffles\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"465\"\u003ePlanewave 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.\u003c\/td\u003e\n\u003ctd width=\"315\"\u003e\u003cimg class=\"alignright size-full wp-image-59776\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/PW-CDK14-baffle.jpg\" alt=\"\" width=\"295\" height=\"200\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"216\"\u003e\u003cstrong\u003eDovetail Expansion Joint\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"465\"\u003eAllows for the difference in thermal expansion between carbon fiber and aluminum. The expansion joint allows the aluminium dovetail expand and contract without stressing the carbon fiber lower truss.\u003c\/td\u003e\n\u003ctd width=\"315\"\u003e\u003cimg class=\"alignright size-full wp-image-59780\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/PW-Expansion.jpg\" alt=\"\" width=\"295\" height=\"200\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"216\"\u003e\u003cstrong\u003eCooling Fans\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"465\"\u003eThree 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).\u003c\/td\u003e\n\u003ctd width=\"315\"\u003e\u003cimg class=\"alignright size-full wp-image-59777\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/PW-CDK14-Fans.jpg\" alt=\"\" width=\"295\" height=\"200\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"216\"\u003e\u003cstrong\u003eDelta-T Ready\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"465\"\u003eFor added dew prevention, the CDK14 is internally wired with polyimide film heater pads and temperature sensor, ready to be controlled with the optional \u003ca href=\"http:\/\/planewave.com\/products-page\/general-accessories\/delta-t-heater\/\"\u003eDelta-T controller\u003c\/a\u003e.\u003c\/td\u003e\n\u003ctd width=\"315\"\u003e\u003cimg class=\"alignright size-full wp-image-59779\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/PW-heat-pad.jpg\" alt=\"\" width=\"295\" height=\"200\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch6\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 20.8px;\"\u003ePlaneWave \u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eCDK 14\" Fused Silica \u003c\/span\u003e\u003cspan style=\"font-size: 20.8px;\"\u003eSpecifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h6\u003e\n\u003cp\u003e\u003cstrong\u003eOPTICAL SYSTEM\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" cellpadding=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eCorrected Dall-Kirkham (CDK)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e14 inch (356mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2563mm (101 inch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eFocal ratio\u003c\/td\u003e\n\u003ctd\u003eF\/7.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eCentral Obstruction\u003c\/td\u003e\n\u003ctd\u003e23.5% by surface area; 48.5% by diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eBack Focus from Mounting Surface\u003c\/td\u003e\n\u003ctd\u003e11.09 inch (282 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e48 lbs (22 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eOTA Length\u003c\/td\u003e\n\u003ctd\u003e35 inch (889 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eOptical Performance\u003c\/td\u003e\n\u003ctd\u003e3.1 micron RMS at 13mm off-axis; 6.0 micron RMS at 35mm off-axis - \u003ca href=\"http:\/\/planewave.com\/wp-content\/uploads\/2013\/07\/CDK14-spot-diagram.jpg\"\u003eSpot Diagram\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eUpper Cage\u003c\/td\u003e\n\u003ctd\u003eCarbon Fiber Truss\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eLower Cage\u003c\/td\u003e\n\u003ctd\u003eCarbon Fiber Truss and Light Shroud\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eOptimal Field of View\u003c\/td\u003e\n\u003ctd\u003e70mm Image Circle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eSECONDARY MIRROR\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" cellpadding=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e165 mm (6.5 inch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePrecision Annealed Borosilicate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eShape\u003c\/td\u003e\n\u003ctd\u003eSpherical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eEnhanced Aluminum - 96%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003ePRIMARY MIRROR\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" cellpadding=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eOptical Diameter\u003c\/td\u003e\n\u003ctd\u003e14 inches (355.6)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e14.5 inches (468.3mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eShape\u003c\/td\u003e\n\u003ctd\u003eProlate Ellipsoid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eFused Silica\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eEnhanced Aluminum - 96%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eLENS GROUP\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" cellpadding=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e95mm (3.7 inch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eNumber of lenses\u003c\/td\u003e\n\u003ctd\u003eTwo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"40%\"\u003eCoating\u003c\/td\u003e\n\u003ctd\u003ebroadband AR Coatings (less than .5% reflected from 400 to 700nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eSTANDARD FEATURES\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"3\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"227\"\u003eCDK Optics\u003c\/td\u003e\n\u003ctd width=\"713\"\u003eThe Corrected Dall-Kirkham design yields a perfectly flat field free from off-axis astigmatism, coma and defocus.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"227\"\u003eCarbon Fiber Truss Design\u003c\/td\u003e\n\u003ctd width=\"713\"\u003eMinimizes thermal expansion which causes focus shift with changes in temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"227\"\u003eDovetail Expansion Joint\u003c\/td\u003e\n\u003ctd width=\"713\"\u003eAllows 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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"227\"\u003eCooling Fans\u003c\/td\u003e\n\u003ctd width=\"713\"\u003eThree 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.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"227\"\u003eDelta-T Ready\u003c\/td\u003e\n\u003ctd width=\"713\"\u003eFor 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.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eSHIPPING\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"3\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"227\"\u003eCrated Shipping Weight\u003c\/td\u003e\n\u003ctd width=\"713\"\u003e 225 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"227\"\u003eCrate Width\u003c\/td\u003e\n\u003ctd width=\"713\"\u003e 31 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"227\"\u003eCrate Height\u003c\/td\u003e\n\u003ctd width=\"713\"\u003e 26 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"227\"\u003eCrate Length\u003c\/td\u003e\n\u003ctd width=\"713\"\u003e 53 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e This product has a lengthy lead time. Please contact \u003cspan style=\"color: #0000ff;\"\u003e\u003ca style=\"color: #0000ff;\" href=\"mailto:education@bintel.com.au\"\u003eeducation@bintel.com.au\u003c\/a\u003e\u003c\/span\u003e for further information.\u003c\/p\u003e","brand":"Planewave","offers":[{"title":"Default Title","offer_id":42045239361605,"sku":"140101Q","price":33599.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/6673\/1845\/files\/IRDK14.jpg?v=1739424162","url":"https:\/\/bintel.com.au\/products\/planewave-cdk-14-inch-fused-silica-2","provider":"The Binocular and Telescope Shop","version":"1.0","type":"link"}