💎 — Alternate design for ground or space based telescope (late 2023)

In this design (v1), the hollow cone is made of reflective material which create an exponential trap for the incoming light. Theoretically, the pin-end could reach the size of a micron-meter (the width of hair). On the graphic, the red triangles are the two observational points. The first one is protecting the light to directly reach the inside of the hollow cone for a better light capture. This design could potentially increase the distance and quality of observation depending on its size. Furthermore, such design could use self-deployable technology (see here), to be put inside rockets at lower costs, and be inflatable.

➠ Special note about debris and micrometeorites (update 25.07.24 - 09h40 GMT) 

This hollowed exponential cone design for space telescopes minimize the surface-area exposed to debris and micrometeorites from the captor perspective (reflective surface). Indeed, the hollowed train being at risk from other angles. This also means that with this design you have less and less floating dust and micro-dust on the reflective material the more and more you get into the hollowed cone (statistically speaking), which is useful for the image capture (the center having more probabilities of being free of impurities).

➠ Note

Could this design offer a complete vision on a horizon sight level through photons falling on a near-horizontal angle in the hollow cone ? 

Or different optical lentils for optical system (camera, photography) ?

Or what about antennas ? 

"Ou la naissance de l'appareil photo-trompette"

➠ Physics : the aftermath, an exchange synthesis

We firstly discussed what kind of wavelength could be observed or reflected inside these hollowed observatories. I then stated that for my actual knowledge there was reflecting materials for any kind of wavelength considering the uses of actual state-of-the-art meta-materials.

Then, at first view, there is an issue with the telescope observational point based on the Laws of reflection. I proposed the following solutions :

1. Creating an observational cave at the dead end, like an eye cavity for an actual human eye : installing the detection material at the end of the design.

2. Accepting, by using a pinhead external observation point, with a built-in limit, to have a central dead pixel : meaning that the hollowed footprint of the external observation point falls into the cone like a shadow. Imagine zooming on someone's picture but having a little black dot at the whole-center growing bigger if you stay zooming-in — however this do not forbid you to recognize the person.

Then, we spoke about how each reflection takes away a percentage of the original light (so after let's say ~100 reflections, you only got ~80% or ~90% of the original light — even with the most reflective materials) — which preserve the second Law of thermodynamics as someone else stated it's wrong. We then discussed how a hollowed cone could produce a hollowed capturing effect (that being the main idea). From a technical point of view, the edges of the resulting image might be darker.

I then stated that you indeed need algorithmic correction for this design as the resulting image will naturally be deformed (so you can navigate inside) — and that each reflection would indeed push for a loss of reflectiveness the further we go inside the hollowed footprint, but, that by definition, each "reflection point" would be captured through the design (we got an pseudo-exponential hollowed footprint of the light, meaning the plane surface is also be totally covered, except a central hollow-point for solution 2. — see above). 

By picturing a hollowing stream of light in a tiny point would you get a zooming effect, kind of like warp effects in star wars ?

Another person stated that my first graphic is wrong from the point of view of light angle reflection — that by the the way the mirror is shaped, the angle of reflection is way greater than the angle of incidence. He then gave a source about the most similar, feasible mirror (a sort of conical shape), as Chandra uses.

I replied that the design' graph is indeed approximative, and, speaking of light reflection angle and design's incidence — that by playing with dimension, shape and size you may find the best exponentially hollowed curve to obtain the best results (kind of like if the Chandra team made the design longer and wider at the top). This is the hard theoretical part I cannot supply, but you can see a representation of what it could look like below. For readability convenience, I will not draw all the incidence angles from different light sources, as some angles indeed produce direct "rebounds" into space through reflecting Laws (as it does for any telescope). Nonetheless, if we chose the solution of an external probe (2), a great part may be captured too.

Lastly, we ended up with a recall that the tiniest captor unit are (2024) around 2 micron size, hence creating a building constraint.

Specifying that it's all a crossed angles game depending on the light source and the (pseudo-exponential) right curvature.

With an external probe :

• The more you've got an incidence angle skimming the edge of the structure, the more the light ray will directly enter the external probe captation system, which could be a constraint, or useful (angle of incidence = angle of reflection, see here).

• Speaking of tridimensional representation, you've got a captation "donut-like zone" around the external probing system — delimited by a tiny hole at the center (where the probe is). Technically,  for the resulting image, light reaches over the limiting derivative from which it falls directly into the external probe (or is hidden by it). This light captation "donut-like zone" reflects itself inside the pseudo-exponential hollowed cone.

Comment :

" Eh la rétine y'a pas une antenne qui sort.

➠ Further science considerations 

The external probe covering the hollow cone in which light is falling may also be used for advanced light interferometry technics : meaning hiding the observed star light source through different wavelenght superposition — such as, optimization constraints let appart, the coronagraph used by the Roman Space Telescope (Roman mission complete delivered to Goddard).

In a matter of futher developements, the estimated "pixel distribution" of the resulting image may be particularly usefull to observe orbiting exoplanets.

➠ Resulting pixel distribution

The upcoming design allows a different pixel capture knowing that light fall pseudo-exponentially inside the hollow cone and that the capture probe is at the center of the cone (see the red triangles in the schema above — with an external observation point). With a certain level of abstraction, and representation error, we could nonetheless obtain a similar pixel capture distribution as in picture N°1 and picture N°2 (pictures found on the web).

Indeed, the resulting external and internal curve depends on the initial telescope curvature design. 

#Key:Invention