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Results tagged with optics
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user 106192
Optics is the study of light, and its interaction with matter. It includes topics such as imaging systems, fiber optics, lasers, quantum optics, and more.
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Signal loss in non-reflected light through a tube proportional to square of the length?
If the tube was 100% reflective - like the sun tubes in some homes - then there would be no loss. In this case the tube is absorbing a portion of the light on each reflection, so if a given ray start …
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Does refraction or diffraction cause rainbows?
The rainbows seen in the sky are caused by rain droplets which are double-refracting the light from the sun. As the wavelengths increase, from red towards blue, the index of refraction increases so t …
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How does the distance between a light source and a lens affect the beam's intensity?
You can do the analysis with basic ray optics and the concept of image magnification.
See https://en.wikipedia.org/wiki/Magnification#Magnification_as_a_number_.28optical_magnification.29 …
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How does magnification work in lensless optical setups?
For the pin-hole camera the analysis is geometric ray optics; the ratio of the image distance to object distance is the same as the ratio of the image height to the object height, which is the definition …
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Optical Frequency Divider?
Optical parametric down conversion; this can be accomplished with a variety of non-linear crystals, such as BBO. Efficiency depends upon matching of energy and momentum conditions with the proper dire …
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Holography, what is difference in it and photography in detail and in concern with physical ...
A holographic record contains more information than a regular photograph; an ordinary photograph records the intensity of light projected upon the recording surface: a flat image, very similar to how …
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Femtosecond photography
Stroboscopes are the ideal method for showing aliasing, which occurs in signal processing whenever the frequencies exceed half the acquisition frame rate.
I don't see how the effect shown in the TED …
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Jones matrices of a mystery device
Since the matrix shown is a rotation matrix, which rotates an input vector by the angle $\phi $, it should be the Jones matrix for a half wave plate.
Click for a list of devices and their correspondi …
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How far do we need to be removed from the earth to show the curvature with a viewing angle b...
As a former sailor I can assure you that you can see the curvature of the earth from the crow's nest - all it takes is a calm sea.
Consider a light house that stands 50 meters above sea level. If you …
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How lens for specs are manufactured for a given power? Do thickness, refractive index play r...
With graduated optics they use materials with graded index of refraction, which in theory can produce flat optical devices. … Here is an elementary introduction: https://optics.synopsys.com/learn/learn-intro-optics-design.html …
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Can we compress microsecond duration laser pulses by a factor of 1000?
Note: Fifteen terawatt picosecond CO2 laser system, OSA Publishing > Optics Express > Volume 18 > Issue 17 > Page 17865, describes a CO2 laser system providing ultrafast pulses with very high power levels …
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Converting Stokes Parameters to Jones Vector
Check an optics textbook like Fowles or Hecht, and look in their chapter on polarized light, and the references. …
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Concentrating the Sun with mirrors facing each other
This is a variation on a theme which has been discussed many times. For example, see Strength of moonlight
The short answer is no; you cannot heat an object hotter than the temperature of the source. …
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Why do we have the absorption edge?
Consider an atomic system with nucleus and bound electrons; as the atomic number increases, so does the number of electrons. The resulting electronic structure is quite complicated, but can be useful …
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Why don't eye lenses alter depth perception?
Depth perception is primarily due to binocular vision - the use of two eyes that see at slightly different angles. All predators have binocular vision so that they can pounce/strike accurately. OTOH, …
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