Mel Bartels Star Test

It is related to social environment. I currently participate in the Oregon Scope Werks and Altaz Initiative groups.

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ATM Star Test Mark Suchting Re.

Mel bartels star test. I have been trying to figure out how to add my ronchi test image to the Matching Ronchi test web program by Mel Bartels and get results out. A more time-consuming test that I find is necessary is the Foucault test as modified by Andre Couder also known as the numerical knife-edge test with zones. The mental image of the tube involves upper and lower tubes connected.

Take a Ronchigram with the phone copy and paste the image to this webpage adjust the grating offset along with any image parameters then inspect for high and low zones to determine next parabolizing work. Im at the point where I should be designing the tube. I recall a medial zone causing some confusion a while back and Mel Bartels star test page has a great write up on it too.

Artificial star distance calculator Nils Olof Carlin. After running the Ronchi test the Foucault test and the star test you should have a very clear picture of the condition of your mirror. Philip Hoyle - Collimation of Newtonian and Schmidt-Cassegrain.

Mel Bartels - Optical Collimation. The spherical aberration of a paraboloid mirror for objects of finite distance. In September we attempted to get a tumble-down jig up to speed.

Ive successfully parabolized 6 f28 105 f27 132 f30 25 f26 and 30 f27 mirrors using the Ronchi Matching Test and star test combination. Even though we got the pieces of the jig together the streetlights around the community center reflect too brightly off the. Mel Bartels telescope making pages.

Calculates the artificial star testing distance from a parabolic mirror for quarter wave accuracy. For eighth-wave accuracy double the distance. John Reed using a laser to insure the various axes are coincident.

Computerizing The Celano Telescope Controller and other motorizing hardware Mel Bartels. This is just one interpretion others may differ. If the Ronchigram looks good and the numbers in the knife-edge zonal test are also within acceptable.

The heart does not show its function as it should do. For my part I know nothing with any certainty. Most Read Articles Moon PhaseMoon Phase Contact Us.

If you are not familiar with star testing please refer to Harold Suiters excellent book Star Testing Astronomical Telescopes for details. Nothing fancy just time lapse assembly of a 400mm F45 Bi. The testing and precise adjustment of the collimation in a Newtonian telescope consists in finely adjusting the primary mirror so that the difraction pattern produced by a star a little out of focus is concentric.

ATM Stopping Down Telescopes WESTLAND JAMES CHRISTOPHER. The question is whether to continue figuring the mirror or to be happy with what I have. See also Collimating a F3 Telescope Mel Bartels BB AstroDesigns Testing and Precise Adjustment.

While taking a test it is always advisable not to employ any method without cross checking its reliability and effectiveness s the market is gloomy as the market may have already peaked. Bratislav - Why the laser collimation is not by itself enough. Galileo Galilee made a telescope to explore the heavens and dig out the hidden realities in space and remained successful.

Null Test for Asperic Mirrors Ross Null Test Lens and Software for Ross Null Test Optical Flats Russell Optics Star Test Star Testing Ronchi Test The Ronchi Test Berthold Hamburgers Home PageRonchi Screen Ronchi Test by Mel Bartels Matching Ronchi Test Spherometers Spherometer Astro-Tel - Spherometers Page Ken Hunters Spherometer Spreadsheet. So the shadow inside can deviate from the images making a PV estimation difficult using the relative shadow diameters. RonWin is one such program and Mel Bartels has another on one of his web pages.

If Melanyone else could guide me id be grateful. My mirror is ready for a star test and for that I want a tube. ATM Star Test Mel Bartels.

ATM - Heresy - Equipment - Ronchi Mel Bartels wrote I hate to push my personal method of doing mirrors on people but I tell. Im back from my summer travels and returning to the Schall von Bell project. Unit of measurement inches millimeters Mirror diameter focal length distance Notes.

Every book contains material all have valuable information but no book has it completely correct. Below is from Mel Bartels Star test standard. I describe here an attempt to quantify progress or lack thereof in the removal of the classic and dreaded turned-down edge TDE present on a 165 Newtonian glass mirror blank that I have been trying to figure for some years.

Popularized by John Dobson and his protoge Bob Kestner optician for the COBE Hubble correction. The star test is qualitative only. Immaterial differences between intra and extra focal images diagonal breakout on either side of focus occurs at about the same distance and there is no turned edge.

ATM Star Test Ramiro Hernandez. Good post Frank Ward Atlanta GA Ho Hum 68degrees and sunny again -----Original Message----- From. Rating mirrors is a popular subject of discussion at club meetings and on the net where a.

What is a good mirror. Applebaum Mel Bartels Ronchi. Aberrator software homepage by Cor Berrevoets for star test simulation.

Mel Bartels Matching Ronchi Test - posted in ATM Optics and DIY Forum. Computer operated telescopes Eric Green. ATM Stopping Down Telescopes Mel Bartels.

Computerizing a 16 Starmaster. Thiery Legault collimation by star test. Mel Bartels 13 f3 zip dobsonian -- folding telescope.

I am able to add the image and adjust the size but it doesnt output any results. The spot test Mel Bartels. To do a star test.

I speak at astronomical conferences and my telescope walkabouts are a popular highlight at the Oregon Star Party. By Mel Bartels INTRODUCTION A great deal has been written on the subject of rating mirrors. New techniques include imaging the inside of the shaft.

Sunday March 28 1999 645 PM Subject. The star test is extremely sensitive and powerful. ATM Star Test Henry T.

ATM Stopping Down Telescopes ME. And the Ronchi Matching test is quick. His DIY telescope project success means that it is not a herculean task because.

2005 Winter Star Party 16 Bino AssemblyTurns out I never posted this 12 year old video whoops.

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