Gregorian reflector

More on tracking contradictions: Optical telescope example

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TRAIL: Theory and best practices for the Webel Parsing Analysis recipe for SysMLv1.6+

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SysML Block Definition Diagram (BDD)

Overview of major Package Diagrams for the optical telescopes model

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Tutorial

TRAIL: Webel SysML Parsing Analysis example: Optical telescopes from Wikipedia: Structure and port-based light flow model

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SysML Package Diagram

AplanaticGregorianReflector - finer image flow model

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Tutorial

TRAIL: Webel SysML Parsing Analysis example: Optical telescopes from Wikipedia: Structure and port-based light flow model

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SysML Internal Block Diagram (IBD)

This is a major advantage for solar telescopes, where a field stop (Gregorian stop) can reduce the amount of heat reaching the secondary mirror and subsequent optical components.

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In the Gregorian design, the primary mirror creates a real image before the secondary mirror. This allows for a field stop to be placed at this location, so that the light from outside the field of view does not reach the secondary mirror.

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AplanaticGregorianReflector - finer light flow model

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Tutorial

TRAIL: Webel SysML Parsing Analysis example: Optical telescopes from Wikipedia: Structure and port-based light flow model

Section

Slide kind

SysML Internal Block Diagram (IBD)

AplanaticGregorianReflector - simple light flow model

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Tutorial

TRAIL: Webel SysML Parsing Analysis example: Optical telescopes from Wikipedia: Structure and port-based light flow model

Section

Slide kind

SysML Internal Block Diagram (IBD)

Gregorian primary and secondary assembly variations within the tube

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Tutorial

TRAIL: Webel SysML Parsing Analysis example: Optical telescopes from Wikipedia: Structure and port-based light flow model

Section

Slide kind

SysML Block Definition Diagram (BDD)

Comparison of reflecting telescopes so far

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Tutorial

TRAIL: Webel SysML Parsing Analysis example: Optical telescopes from Wikipedia: Structure and port-based light flow model

Section

Slide kind

SysML Package Diagram

The overall focal ratio of the complete telescope will be f/8 and the optical prescription is an aplanatic Gregorian telescope.

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Diagram of the lightpath through a Gregorian telescope.

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The Gregorian telescope employs a concave secondary mirror that reflects the image back through a hole in the primary mirror.

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Tutorial

TRAIL: Webel SysML Parsing Analysis example: Optical telescopes from Wikipedia: Structure and port-based light flow model

Section

Slide kind

SysML Block Definition Diagram (BDD)

The Gregorian telescope consists of two concave mirrors; the primary mirror (a concave paraboloid) collects the light and brings it to a focus before the secondary mirror (a concave ellipsoid) where it is reflected back through a hole in the centre ...

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There are several large modern telescopes that use a Gregorian configuration such as the Vatican Advanced Technology Telescope, the Magellan telescopes, the Large Binocular Telescope, and the Giant Magellan Telescope.

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The Gregorian telescope ... employs a concave secondary mirror that reflects the image back through a hole in the primary mirror. This produces an upright image

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Most (but not all) telescope designs produce an inverted image at the focal plane

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Tutorial

TRAIL: Webel SysML Parsing Analysis example: Optical telescopes from Wikipedia: Structure and port-based light flow model

Section

Slide kind

SysML Block Definition Diagram (BDD)

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