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Optics and Algorithms

Wednesday, December 9, 2015. The more samples you take, the more even the distribution becomes. Saturday, May 23, 2015. Building a telescope - Central Obstruction Vignetting. Optics and algorithms is building a tellyscope! After much deliberation it will be a 10" (250mm) aperture dobsonian with a focal ratio of 5.2, aka a focal length of 1300mm, almost exactly the same focal length as my 102mm Maksutov, but obviously much more resolution and light gathering. Why a focal ratio of 5.2? Here is the output o...

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Optics and Algorithms | opticsandalgorithms.blogspot.com Reviews

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Wednesday, December 9, 2015. The more samples you take, the more even the distribution becomes. Saturday, May 23, 2015. Building a telescope - Central Obstruction Vignetting. Optics and algorithms is building a tellyscope! After much deliberation it will be a 10 (250mm) aperture dobsonian with a focal ratio of 5.2, aka a focal length of 1300mm, almost exactly the same focal length as my 102mm Maksutov, but obviously much more resolution and light gathering. Why a focal ratio of 5.2? Here is the output o...

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Optics and Algorithms | opticsandalgorithms.blogspot.com Reviews

https://opticsandalgorithms.blogspot.com

Wednesday, December 9, 2015. The more samples you take, the more even the distribution becomes. Saturday, May 23, 2015. Building a telescope - Central Obstruction Vignetting. Optics and algorithms is building a tellyscope! After much deliberation it will be a 10" (250mm) aperture dobsonian with a focal ratio of 5.2, aka a focal length of 1300mm, almost exactly the same focal length as my 102mm Maksutov, but obviously much more resolution and light gathering. Why a focal ratio of 5.2? Here is the output o...

INTERNAL PAGES

opticsandalgorithms.blogspot.com

1

Optics and Algorithms: Animation of the diffraction of spider vanes growing from 0 to 5mm

http://opticsandalgorithms.blogspot.com/2015/05/animation-of-diffraction-of-spider.html

Tuesday, May 19, 2015. Animation of the diffraction of spider vanes growing from 0 to 5mm. The following animation shows how the diffraction pattern formed by spider vanes changes as the vanes increase in thickness for a Newtonian reflector with aperture of 130mm and a central obstruction of 25% by diameter. The image spans 60 arcseconds, and has been enhanced to show the more faintly illuminated parts of the pattern more clearly (the view in the eyepiece would not be so exaggerated).

2

Optics and Algorithms: Animation of the diffraction of a central obstruction growing from 0% to 50%

http://opticsandalgorithms.blogspot.com/2015/05/animation-of-central-obstruction.html

Friday, May 8, 2015. Animation of the diffraction of a central obstruction growing from 0% to 50%. The following animation is a series of images of the diffraction pattern formed by a 130mm Newtonian reflector with 0.5mm spider vanes and a central obstruction that increases from 0% (by diameter) to 50% in 5% increments. The images span 60 arcseconds. July 30, 2015 at 1:01 AM. I will keep your new article. I really enjoyed reading this post, thanks for sharing. Subscribe to: Post Comments (Atom).

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Optics and Algorithms: April 2015

http://opticsandalgorithms.blogspot.com/2015_04_01_archive.html

Tuesday, April 14, 2015. Contrast and resolution of different telescopes. The following telescopes designs have been simulated to derive data about their relative levels of contrast and resolution. The method is described in a previous post, Calculating diffraction patterns. However, in summary, the closer the resolution figure is to zero, the better, and the closer contrast figures are to one, the better! Resolution is calculated as the radius of the first minimum of the diffraction pattern. The followi...

4

Optics and Algorithms: Contrast and resolution of different telescopes

http://opticsandalgorithms.blogspot.com/2015/04/contrast-and-resolution-of-different.html

Tuesday, April 14, 2015. Contrast and resolution of different telescopes. The following telescopes designs have been simulated to derive data about their relative levels of contrast and resolution. The method is described in a previous post, Calculating diffraction patterns. However, in summary, the closer the resolution figure is to zero, the better, and the closer contrast figures are to one, the better! Resolution is calculated as the radius of the first minimum of the diffraction pattern.

5

Optics and Algorithms: Calculating diffraction patterns

http://opticsandalgorithms.blogspot.com/2015/04/calculating-diffraction-patterns.html

Saturday, April 11, 2015. I've always been fascinated by different telescopes designs and the endless debates about how they offer different degrees of contrast and resolution. Hard figures are however hard to come by. In the following paragraphs I describe at a high level how I eventually calculated some figures for myself. You can always trust my workings (ha ha) and skip to the bottom of the page, where I give my results for a few common and a few exotic telescopes. The first challenge is to calculate...

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opticsandalgorithms.blogspot.com

Optics and Algorithms

Wednesday, December 9, 2015. The more samples you take, the more even the distribution becomes. Saturday, May 23, 2015. Building a telescope - Central Obstruction Vignetting. Optics and algorithms is building a tellyscope! After much deliberation it will be a 10" (250mm) aperture dobsonian with a focal ratio of 5.2, aka a focal length of 1300mm, almost exactly the same focal length as my 102mm Maksutov, but obviously much more resolution and light gathering. Why a focal ratio of 5.2? Here is the output o...

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