All Questions
Tagged with optics diffraction
150
questions with no upvoted or accepted answers
8
votes
2
answers
178
views
What makes diffraction spikes move with the focus?
This is a bit of a follow up on The Bahtinov focusing mask and it came with this question on Astronomy. But I think the effect can also be observed when looking through a hazy atmosphere or a stained ...
user265136
5
votes
0
answers
87
views
Simulation of a dispersive crystal mirror
I am trying to simulate a simple setup where I have a point source of broadband light whose light is incident upon a spherical crystal at a central angle $\theta_i$. Assuming Bragg diffraction some of ...
- 1,047
3
votes
0
answers
116
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What causes a double peak for a single wavelength when using an optical spectrometer system?
I am doing an experiment to determine the Rydberg constant for the Balmer series using an optical spectrometer system (consisting of a monochromator with a photomultiplier detector and pulse counting ...
- 115
3
votes
0
answers
657
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Spot size for objective (not infinity corrected)
A fundamental axiom of imaging in optics is the resolving power of the lens system, which is directly related to the smallest possible spot a lens can form. For an ideal lens with a numerical aperture ...
- 372
3
votes
2
answers
869
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What determines how much power goes into each diffraction order?
Imagine a grating with infinite number of slits, and the spacing D between slits is larger than the wavelength so that there are high order diffractions. In each of the diffraction directions the ...
- 131
3
votes
1
answer
2k
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how can interference occur within diffraction?
My book says :
The number of interference fringes occuring in the broad diffraction peak depends on the ratio d/a that is the ratio of the distance between the two slits to the width of a slit. In ...
- 457
2
votes
0
answers
45
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Why doesn't a lens after a diffraction grating affect the optical path difference?
When observing interference fringes one often uses a lens after the diffraction grating to focus the fringes on a screen like this:
At first sight, one might think that after the lens the path ...
- 1,702
2
votes
1
answer
83
views
Interference between two beams of unpolarized light
Interference is explained by showing a diagram of two parallel waves of light that are in phase or out of phase and showing the result of the fields constructively or destructively interfering. ...
- 1,096
2
votes
0
answers
41
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Why is the 0-order Maxima so wide for a single slit diffraction pattern?
When looking at the graph of single or double slit diffraction graph, I noticed then for single slit the 0 ordered Maxima is twice as wide as compared to the other nth order Maxima. However, for ...
2
votes
0
answers
25
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How to model the effects of diffraction for a convex lens?
I am using a convex lens in a wavefront-measuring interferometer for testing microscope objectives, where the lens images the exit-pupil of the objective onto my camera. It is my understanding that ...
- 31
2
votes
0
answers
47
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Is it possible to measure the temperature of a candle by the diffraction method?
I am reading a book " Physics, Fun and Beyond" by Eduardo de Campos Valadares. In his book, he is mentioning about an experiment "bending laser beams with hot air." I am posting a ...
- 221
2
votes
1
answer
182
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How to measure the intensity of a pen-type laser beam?
I need to measure the intensity of a green pen-type laser, rated at $500\,\mathrm{mW}$, before and after it undergoes Bragg diffraction by a synthetic Opal cube. I've basically zero experience with ...
- 35.4k
2
votes
0
answers
22
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Measurement of the quality of finite non-diffracting beam
All sorts of non-diffracting beams have been observed nowadays, e.g., the classic finite Airy beam (by Siviloglou et. al. [2007]). In the past decade, lots of variants of finite Airy beam appear, ...
- 21
2
votes
0
answers
87
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Holograms as a superposition of many individual interference patterns
I've recently started reading about non-linear optics and holograms. While I do understand the basics of how holograms are made, by superposing the reference waveform on the object waveform over a ...
- 1,791
2
votes
0
answers
84
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Kirchhoff Diffraction for backwards wave propagation
Classic Kirchhoff Diffraction integral for a monochromatic wave is formulated with a restriction that it's only applicable to a point that's outside of the volume enclosed by the integration surface ...
- 79