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Tag: lens

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Galactic Communications Using a Gravitational Lens

Gravitational lensing is the process of a large mass bending light from a distant source. Einstein predicted this and astronomers can now detect it. By placing an optical collector or a radio antenna at a distance of 550 AUs or greater from our Sun, it can be used as a lens to focus detail from […]

Liquid Crystal Phonon Lenses

Liquid crystals are substances that have some form of crystalline structure and exhibit some characteristics of crystals but flow like a liquid. They form long thin molecules that have either some electromagnetic component or an optical component such as light polarization. Liquid Crystal Displays (LCD) use these electrical and optical qualities of liquid crystals to […]

1608 – telescope

Hans Lippershey, a Dutch lensmaker has been given primary credit for making the first recorded optical telescope in 1608, although there is evidence that other telescopes or “looking glasses” existed prior to his work. PRECURSOR: 0085 – Ptolemy 0800 – astrolabe invented 0965 – Alhazen wrote “Book of Optics” and investigated using curved mirrors as […]


Metamaterials are artificially created materials that exhibit characteristics not found in natural materials. These unique properties are often derived from the nanoscale structure of the material instead of from the chemical makeup. Most current references to metamaterials deal with interesting electromagnetic properties and often photonics or opto-electronics. One of the most exciting applications in this […]