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Speckle Images Using Concentric Black and White Hexagonal Pupils
I constructed a new concentric black and white (B/W) hexagonal aperture, and we resized the image in a 1024 × 1024 pixel matrix using MATLAB code....
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William Herschel and the “Front-View” Telescopes
William Herschel is rightly regarded as one of the greatest telescope makers in history. His instruments vastly exceeded in aperture and...
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The Planets: What You Can Realistically Expect to See
We were all brought up on photographs from the Hubble Space Telescope and the various interplanetary space probes. It goes without saying that the...
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Non-European World Views
In the last chapter, we considered the Classical Greek world view that focused on the Earth as the center of the universe (and the solar system)....
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The James Webb Space Telescope
The James Webb Space Telescope (JWST) is a large (6.6 m), cold (<50 K), infrared (IR)-optimized space observatory that will be launched early in the...
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Telescopes and Images
The telescope is so often considered as the astronomical tool par excellence that it would be easy to forget that it is just one of the components of...
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A new interpretation of the Stiles-Crawford effects in human vision
A retinal 3D grating chip in focal plane of the lens/pupil system of the human eye explains, via the classical crystal-optical von Laue equation,...
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Diffraction Gratings
This article is more particularly devoted to fundamental properties of optical gratings, some of which have not yet been fully discussed in the...