Tag: optics

16 Why does a mirror bent 'like a potato chip' allow space telescopes to be smaller and have a wider field of view? 2015-11-06T03:05:05.697

10 Has anyone ever tried to make a simple telescope using ice? 2018-09-25T05:15:45.500

8 Theoretically, what is the biggest optical telescope that may exist? 2015-10-17T14:31:55.497

7 Why does e.g. Hubble's secondary mirror not block part of the picture? 2014-02-24T20:59:12.600

7 Why aren't secondary mirrors offset to get rid of diffraction spikes due to the support vanes? 2015-05-23T04:40:38.063

7 Are there any mirrors in space? 2017-09-13T17:19:11.417

6 What makes small interferometers useful? Like NIRISS on JWST 2015-10-30T10:49:08.087

6 Where exactly is the modification that first corrected the spherical aberration in Hubble's primary mirror? 2018-10-06T05:36:15.207

6 Why are there optical differences between sunrise and sunset? 2018-10-11T20:15:40.853

5 How do telescopes "zoom" and change angle of view? 2014-08-01T07:49:56.147

4 How does a Bahtinov mask work? 2013-11-18T14:33:01.907

4 Is it possible to steer the sight of a Liquid Mirror Telescope using a plain mirror scheme? If yes, why hasn't it been done? 2014-12-15T13:47:13.763

4 Could spy satellites use laser guide stars (for adaptive optics)? 2015-08-01T10:55:30.530

4 Constructing a periscope/telescope - trouble with lenses 2017-02-22T23:12:49.387

3 Why can't the surfaces of stars be observed? 2014-10-03T09:05:07.457

3 Enhanced Star-Gazing with Special Glasses 2015-02-23T16:44:45.120

3 Astronomical telescope making 2015-11-06T01:40:04.483

3 What would be the maximum theoretically possible angular resolution? 2015-11-10T08:11:35.887

3 Is it practical to hand grind a convex parabolic or hyperbolic mirror? 2016-03-01T16:11:28.310

3 Dish antenna as parabolic mirror for OPTICAL telescope? 2016-03-01T17:51:20.237

3 How to make a telescope for viewing planets, moon and DSOs using a convex lens of aperture 100 mm and focal length 200 mm and other lenses at home? 2016-05-13T12:19:03.923

3 Can a telescope be built to focus on a point source star? 2016-09-03T09:47:28.377

3 Projecting an image of the sun / eclipse 2017-06-29T23:48:25.723

3 How do tip tilt mirrors correct distortion in adaptive optics? 2017-07-24T11:22:43.490

3 Is it possible to model a solar thermal concentrator using Zernike polynomials? 2018-01-10T16:47:08.417

3 How to understand Kepler telescope under large aspherical wavefront 2018-05-24T10:31:36.613

3 What is the cause of all of these sharp, concentric rings around bright stars in this HST image? 2018-11-02T00:42:29.060

2 Can the Sun be used as a point source of light to achive better focus? 2014-06-09T07:44:05.790

2 Adaptive Optics? 2014-09-09T22:22:44.703

2 What is the faintest magnitude a telescope can see? 2016-08-23T15:11:40.000

2 Why is this HST WFPC2 image so much fuzzier than the WFC3 image of the same field? 2017-06-04T09:06:21.530

2 How well can the Sun's surface be resolved by an observatory? 2017-11-25T09:52:09.360

2 Telescope and its construction 2018-01-31T16:14:16.140

2 What is a pupil slicer, and how does it work with anamorphic optics in VLT's ESPRESSO Echelle spectrograph? 2018-09-25T01:50:05.220

2 Arago Spot in the Shadows of Celestial Bodies 2018-11-05T22:16:42.947

1 What is the longest observable wavelength of light using an optical telescope? 2016-03-03T05:34:11.123

1 Magnification of a telescope 2016-04-29T23:59:31.857

1 Is there a spectrum of polarization? Does polarization vary depending on wavelength, from one and the same source? 2016-09-06T10:31:14.157

1 Lunar terminator illusion 2017-02-08T17:02:33.967

1 Does Arecibo's secondary optics compensate when viewing farther away from vertical? 2018-11-23T04:32:53.707

0 What could have made a satellite appear to move side to side while near the horizon? 2017-02-13T02:06:32.497

0 What telescope is this, and how does it work? 2017-06-03T13:50:53.747

0 Why does the sun appear 13x bigger through diffraction in Voyager 1 image from 1990, but not from Earth? 2018-10-26T22:28:03.280

-1 Why does the sky look like it has three suns in this video? 2018-08-19T07:30:07.290