NASA believes using glitter clouds for stargazing telescopes instead of mirrors will save money and allow for simpler deployment. Mirrors in telescopes may be made of reflective, glitter-like particles. Scientists at Pasadena’s Jet Propulsion Laboratory (JPL), California believe that glitter clouds could be used to enable high-resolution imaging without having to install bulky and expensive mirrors. To image stars and exoplanets, conventional telescopes use large mirrors.
The large, complicated mirrors required to view deep space are expensive and time-consuming to construct. They are heavy and large, which makes it difficult to launch an orbiting telescope. This image shows the white light reflecting off of a glitter reflection onto a camera sensor.
This was part of the concept for ‘Orbiting Rainbows’. Scientists tried it in the laboratory. (Credit: G. Swartzlander/Rochester Institute of Technology) Researchers considering Orbiting Rainbows Scientists at JPL wondered whether Orbiting Rainbows might make it easier and cheaper to deploy orbiting telescopes.
To help telescopes take images from deep space, they would prefer to make use of clouds made of reflective particles that resemble glitter. Orbiting rainbows would allow you to still obtain high-resolution images but with significantly lower prices. Marco Quadrelli (JPL Orbiting Rainbow) explained that it is a floating cloud that acts as a mirror. It has no back structure, steel, hinges, or other support. Glitter clouds created by laser beams JPL scientists claim that several laser beams could trap and manipulate glitter-like particles within a small cloud.
The momentum of two laser light photons, tiny light particles, would trap the glitter particles. One set would push them away while the other would pull them towards the axis. The mirror cloud would be shaped by the laser beams coming from different directions. They will apply pressure to various places and push the tiny particles in the same direction. Each grain in the cloud would be less than one millimeter wide.
The telescope would have to be equipped with a large adjustable aperture. This is the area through which light travels during optical and photographic measurements. Rochester Institute of Technology researchers created a mirror out of glitter in order to test the possibility of using reflective clouds as space telescope mirrors. Two light sources were photographed in the laboratory using this mirror.
More nimble telescopes Without the bulky mirror, telescopes made for an Orbiting Rainbows system would be much easier and simpler to package, transport, and send into orbit compared to conventional ones.
Quadrelli stated that “you deploy the cloud and trap it, and shape it.” Nature, both on Earth and in space, has many structures with light scattering and focusing features such as rainbows and comet trails. These natural phenomena and lab tests in optical manipulation have led to Orbiting Rainbows’ invention. Antoine Emile Henry Labeyrie was a French astronomer.
He first suggested using a telescope based upon a laser-trapped mirror embedded in a 1979. paper. Scientists at JPL are trying to figure out how to control and maintain an orbiting cloud made up of particles similar to dust using laser pressure. This will allow it to function as an adaptive reflective surface that can be used for electromagnetic purposes, such radar or optical bands. There are more distortions from a glitter cloud. Because the glitter clouds do not have smooth surfaces, images created with them in telescopes would show more speckled distortion than with conventional mirrors.
Researchers are developing algorithms that can take multiple images of the same object and remove speckle effects from glitter. Gover Swartzlander (associate professor, Rochester Institute of Technology), New York) and his students applied glitter to a concave lens inside the lab. This was done in order to verify the concept.
To represent the light of a binary star (or two-star) system, they used laser beams. A speckled mirror pointed towards the binary star simulation and was captured by a camera. The image of the two stars was created using the glitter mirror after a series of exposures. Quadrelli stated that this was a significant achievement.
This is a controlled experiment that allowed us to image in visible light. Radio-band signals are easier to use. The radio-band signals last one centimeter longer than the visible light (nanometers), which means that mirror grains don’t have to be aligned and controlled as closely.
These advantages allow for many Earth science applications, such as remote sensing water and earthquake detection, among others. Darmindra Arumugam, a JPL scientist is currently researching possible mechanisms for remote sensing using Orbiting Rainbows. JPL’s optical designers have been researching adaptive optics methods that could be used by Orbiting Rainbows-based telescopes.
Reflective and diffractive options for a telescope using Orbiting Rainbows have been explored. They also tested the sensitivity of these versions at specific frequencies. To demonstrate the viability of Orbiting Rainbows technology, researchers will deploy a telescope that has a tiny patch of particles. This is to prove that it can be modified and bent to reflect light. NASA states that the next step is to create many patches of this material and to synthesize an aperture to allow for imaging. JPL Video – Orbiting Rainbows. This JPL video describes Orbiting Rainbows.