Though i really admire the creative dobs that many of you have designed, its just my nature to take the road lesstravelled. In many cases, the selection of tolerances is determined by experience, as well as by outputs from optical design software. Please reach us by live chat or email if our phone line is busy. This is a dall kirkham optical design with coatings that are optimized to transmit in infrared or ultra violet wavelengths. Show dall kirkham telescopes, takahashi dall kirkham telescopes, and takahashi mewlon dall kirkham telescopes. Dallkirkham telescope is based on a new optical design developed by dave rowe. The cdk corrected dallkirkham telescope is based on a new optical design developed by dave rowe.
Planewave instruments is committed to providing observatoryclass products for serious astronomers at an unprecedented value. Dallkirkham vs classical cassegrain posted in reflectors. The takahashi mewlon series of dall kirkham telescopes by takahashi combines refractorlike performance in a larger folded optic reflector design. The entire optical design software for windows provides a combination of quality of modastogether with the convenience, flexibility and computation speed of a welldesigned windows program. The cdk17 has a dual carbonfiber truss design, with 3 cooling fans ejecting air from the back of the telescope, and 4 fans blowing across the boundary layer of the mirrors surface.
The tools of space situational awareness ssa include groundbased optical. History invented by master optician horace dall in 1928. Introducing the planewave instruments cdk24, a 24 inch 0. Imaging harmer wynne manual pre 2018 ag optical systems thermal manager manual the idk manual contains for reference purposes instructions for the previous version of the thermal manager application. The dall kirkham uses a spherical secondary in combination with an elliptical primary.
Dallkirkham vs classical cassegrain reflectors cloudy. Cdk stands for corrected dallkirkham corrected because a dallkirkham design by itself produces sharp images at the center of. With this java applets collection you can design and analyze one mirror newtonian and classical two mirror telescopes cassegrain, gregorian, dall kirkham, pressmanncamichel, ritcheychretien, one mirror catadioptric systems houghton, schmidt and maksutov cameras, two mirror catadioptric systems. With its powerful psd algorithm, synopsys can do in one second a job that takes other programs more than an hour. Pacific time while we and our suppliershipping partners are doing our best to get your order to you quickly and safely, we appreciate your understanding if we experience any delivery delays due to the pandemic. Takahashi mewlon 300crs dallkirkham optical tube assembly. Gregorian, dallkirkham, pressmanncamichel, ritcheychretien, one mirror. The goal of the design is to make an affordable astrographic telescope with a large enough imaging plane to take advantage of. Read more the cdk corrected dallkirkham optical design is an innovative solution for unsurpassed scientific investigation, visual observing and astroimaging at an affordable price. The takahashi mewlon series of dallkirkham telescopes by takahashi combines refractorlike performance in a larger folded optic reflector design. This paper compares specific designs based on the dallkirkham format of prolate ellipsoid primary and spherical secondary mirrors, in which excellent correction is achieved over a significant field angle. Takahashi mewlon 300crs dallkirkham ota telescopes. My understanding is that the dk is simpler mirrors to produce which yields consistent quality, but as a consequence of that you get more coma off axis, but excellent on axis performance and easier collimation. The dallkirkham uses a spherical secondary in combination with an elliptical primary.
As with all the odk models, the odk10 is fitted as standard with an acu3s, 3 focuser to enable a strong focusing platform for a wide range of cameras. These services also can include mechanical, software and electronic engineering. We present the design of an improved corrector for spherical primary telescopes. Modas stands for modern optical design and analysis software it is a telescope design software of the most popular telescope systems used by the amateur astronomers and telescope makers, including spot diagrams, ray fans, wave aberrations, diffraction analysis, optical layout, optimization, tolerancing, mirror testing and many other atm tools. The consequence however is that also a 3d cad program was needed, and i. Developed by planewave, the cdk corrected dallkirkham is a revolutionary new telescope optical system that was designed to excel at imaging on large format ccd cameras while remaining an excellent instrument for visual use. The cdk corrected dall kirkham optical design is an innovative solution for unsurpassed astroimaging quality at an affordable price. Dall kirkham vs classical cassegrain posted in reflectors. These dall kirkham telescopes offer an optical quality unmatched by most modern scopes. Jul 07, 2017 proven optical design the cdk corrected dall kirkham optical design is an innovative solution for unsurpassed scientific investigation, visual observing and astroimaging at an affordable price.
Ag optical systems imaging dall kirkham idk astrographs are high resolution instruments with outstanding on and off axis performance across a huge 60mm field of view. A comparative study and simulation of reflecting telescope. What are some open sourcefree optical design software. Planewave interface pwi3 is the one software you will need to monitor and. The ridk 800 riccardi dallkirkham represents the new reference point for all modified dallkirkham instruments available on the market today. The modified dallkirkham telescope utilizes an elliptical primary and spherical secondary. I havent had the chance to test all of them, so youre going to have to try the free ones out for yourself and see what works best for your needs. The mewlon series of dall kirkham telescopes by worldrenowned takahashijapan combines refractorlike performance in a larger folded optic reflector design. This reflector with its excellent optical qualities can be used in a wide range of applications, and brings it on the top of the market. By using an ellipsoidal primary mirror, it is possible to make a system free from spherical abberation by using a spherical secondary mirror, which is much easier to make and test than the hyperbolic secondary in. This is due to the forced presence of optical lenses in the optical path and the associated chromatic aberration. The ridk 800 riccardi dall kirkham represents the new reference point for all modified dall kirkham instruments available on the market today. The main drawback to the dallkirkham design is that the coma is even stronger than in a classical cassegrain, limiting the useful field of view. It is a telescope design software of the most popular telescope systems used by the amateur astronomers and telescope makers, including spot diagrams, ray fans, wave aberrations, diffraction analysis, optical layout, optimization, tolerancing, mirror testing and many other atm tools.
Planewave 17 cdk optical tube assembly cloud break optics. Aug 08, 2014 ag optical systems imaging dall kirkham idk astrographs are high resolution instruments with outstanding on and off axis performance across a huge 60mm field of view. The cdk24 covers a 70 mm field of view without any field curvature, offaxis coma, or. With its cassegrain range reflectors, based on dallkirkham optical design, takahashi acted as a pioneer, and made schmidtcassegrain other manufacturers outdated. Although the optical mirrors are easier and cheaper to produce, the dall kirkham design could not prevail in upscale astrophotography and especially in the field of research. Officina stellare ridk 800 f7 dall kirkham ota telescope opt. This is a dallkirkham optical design with coatings that are optimized. This can be used to provide the basics of commonly encountered telescopes newtonian, corrected newtonian, dall kirkham, corrected dall kirkham, ritcheychetien, cassegrain. Optical design softwares do this zemax, code v, oslo, etc optical design software is used to minimize aberrations if given a well defined set of parameters to optimize aberration measure. Planewave pw 1meter telescope observatory solutions. Can anyone explain the difference in optical performance between these two designs.
Modas stands for modern optical design and analysis software. Massimo riccardi, chief optical designer at officina stellare, has the unique experience and creativity required to imagine and build a 31. Dive in deep into the cdk optial design or see what makes direct drive. The main drawback to the dall kirkham design is that the coma is even stronger than in a classical cassegrain, limiting the useful field of view. Takahashi mewlon 210 dallkirkham telescope camera concepts. The fieldcorrected dallkirkham, or cdk, uses at least two lenses ahead of the focal plane to correct offaxis aberrations, including field curvature and astigmatism. During the optical design process, the cdks secondary is kept spherical, but the asphericity of the primary mirror and the shapes of the lenses are allowed to vary in order to. The cdk corrected dallkirkham optical design is an innovative solution for unsurpassed scientific investigation, visual observing and astroimaging at an affordable price.
Jodas stands for java optical design and analysis software and it is based on modas. There are two options for a dall kirkham, either make it long focus to avoid the. Imaging dall kirkham manual pre 2018 newtonian astrograph manual. With this java applets collection you can design and analyze one mirror newtonian and classical two mirror telescopes cassegrain, gregorian, dallkirkham, pressmanncamichel, ritcheychretien, one mirror catadioptric systems houghton, schmidt and maksutov cameras, two mirror catadioptric systems. To increase the angular field of cassegrainlike telescopes, various designs of correctors have been incorporated in the optical train. Also, aberrations in popular reflecting, refracting and catadioptric telescope objectives, telescope eyepiece and human eye. The cdk14 is a lightweight carbonfiber truss design weighing less than 50lbs, with 3 cooling fans blowing air throughout the back of the telescope.
This is a dallkirkham optical design with coatings that are optimized to transmit in infrared or ultra violet wavelengths. The optical design of the telescope bears explanation. New designs of corrected dallkirkhamtype telescopes. Developed by planewave, the cdk corrected dall kirkham is a revolutionary new telescope optical system that was designed to excel at imaging on large format ccd cameras while remaining an excellent instrument for visual use. Browse an extensive selection of astronomy equipment at. The cdk17 covers a 70 mm field of view without any field curvature, offaxis coma, or astigmatism. Corrected, optimized, modified, opt has all the dk designs you need. Dallkirkham telescopes expert service unbeatable prices. The mewlon300crs is the largest of the corrected dall kirkhams made by takahashi. I want to make a scope i can actually mount onto my gpdx. Ingalls eventually published an article that mentioned the design, calling it the dallkirkham, and the name stuck. The dallkirkham dk is a design variation on the classical cassegrain. Show dallkirkham telescopes, takahashi dallkirkham telescopes, and takahashi mewlon dallkirkham telescopes. Optical design softwares do this zemax, code v, oslo, etc optical design software is used to minimize aberrations if given a well defined set of parameters to optimize aberration measure courtesy.
Dks are normally intended for highpower planetary observing where only a small field is used. Optical layout of a corrected dallkirkham telescope. Example of increasing graphic sophistication, from a simple crosssectional line plot to a 3d wireframe to a 3d solid model in modern lens design software. Dallkirkham vs classical cassegrain reflectors cloudy nights. From common software packages used in optics design and simulations. I would be very pleased if i can do with my new program useful to the numerous advanced amateur astronomers and telescope makers. I am looking for a scope that wont be too hard to fabricate. Proven optical design the cdk corrected dallkirkham optical design is an innovative solution for unsurpassed scientific investigation, visual observing and astroimaging at an affordable price. Dallkirkham optical tube assembly 20 planewave instruments. The goal of the design is to make an affordable astrographic telescope with a large enough imaging plane to take advantage of the large format ccd cameras of today. This can be used to provide the basics of commonly encountered telescopes newtonian, corrected newtonian, dallkirkham, corrected dallkirkham, ritcheychetien, cassegrain. It has excellent performance with large format ccd cameras, far exceeding the offaxis performance of most commercial telescope designs, including the uncorrected ritchey. Optical layout of a corrected dallkirkham telescope the dallkirkham dk is a design variation on the classical cassegrain.
The cdk corrected dallkirkham optical design is an innovative solution for unsurpassed astroimaging quality at an affordable price. The cdk brochure compares a cdkthus a corrected dall kirkham with an. Takahashi mewlon 300crs dall kirkham optical tube assembly. Modified dall kirkham telescope the dall kirkham cassegrain telescopes design was created by horace dall in 1928 and took on the name in an article published in scientific american in 1930 following discussion between amateur astronomer allan kirkham and albert g. With its powerful psd algorithm, synopsys can do in one second a. Ive had the urge to build a new scope for quite some time now. Planewave instruments technologies optical, mechanical. Optical layout of a corrected dall kirkham telescope the dall kirkham dk is a design variation on the classical cassegrain. Planewave instruments enters onemeter observatory telescope. Synopsys is one of the largest and most powerful lens design programs in the world, with features found nowhere else. We are your source for astronomy telescopes, eyepieces, astroimaging cameras, and more.
These dallkirkham telescopes offer an optical quality unmatched by most modern scopes. The corrected dallkirkham cdk ceravolo optical systems. The cdk telescope design provides excellent imaging with large format ccd cameras while remaining superb for visual use. Jodas stands for java optical design and analysis software. The mewlon series of dallkirkham telescopes by worldrenowned takahashijapan combines refractorlike performance in a larger folded optic reflector design. There are no refractive lens, only reflective components to the design. Officina stellare ridk 800 f7 dall kirkham ota telescope. The cdk14 covers a 70 mm field of view without any field curvature, offaxis coma, or astigmatism. The cdk optical design baader planetarium blog posts. Ingalls eventually published an article that mentioned the design, calling it the dall kirkham, and the name stuck. The design produces a flat, comafree and astigmaticfree field of view. The cdk24 has a dual truss design, with 3 cooling fans for the back of the primary mirror and 4 fans for the front surface of the primary mirror.
Software for designing telescopes and other complex optical systems. The dallkirkham cassegrain telescopes design was created by horace dall in 1928 and took on the name in an article published in scientific american in 1930 following discussion between amateur astronomer allan kirkham and albert g. The fieldcorrected dall kirkham, or cdk, uses at least two lenses ahead of the focal plane to correct offaxis aberrations, including field curvature and astigmatism. Takahashi mewlon 250crs corrected dall kirkham telescope ota. The cdk corrected dall kirkham telescope is based on a new optical design developed by dave rowe. Dall kirkham telescope is based on a new optical design developed by dave rowe. It is diffraction limited across a 20mm image circle at the focal plane.
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