All Questions
12
questions
0
votes
1
answer
399
views
Phase Shifting Beam Splitter
I am trying to make sense of all these answers in: Phase added on reflection at a beam splitter? and web search results. So my understanding is that the actual phase shift depends on the beam splitter ...
- 613
0
votes
1
answer
170
views
In a Mirau Interferometer what is the distance between the mirror and the beamsplitter?
A Mirau interferometer (shown left in the figure, next to the Michelson configuration to the right) is an important instrument for non-contact surface profilometry.
Briefly, taken from Wikipedia, &...
- 611
0
votes
2
answers
50
views
Add coherence length factor in source term for light source
I am trying to model the behavior of a Michelson-interferometer driven by a light source with a short coherence length (i.e. some centimeters at max.). By placing transmittive material in one of the ...
- 365
1
vote
1
answer
355
views
How does the effective focal length work for aspheric lenses? How should I select an aspheric lens?
I am currently looking at aspheric lenses on Thorlabs. I want to use them as a collimation optic for my interferometry experiment. Note that the lenses have a listed EFL (effective focal length). But ...
- 889
1
vote
3
answers
3k
views
Why is it harder to use a white light source in a Michelson Interferometer?
In a Michelson Interferometer, a light beam is split into 2 different beams that travel different optical paths, through the "arms" of the interferometer. Then, they are reflected and, ...
- 548
2
votes
0
answers
65
views
Infinite sum of transmitted parallel light fields
I'm currently studying
optics and came across the possibility of retrieving the original electric (light field) from a pair of partially reflecting mirrors, but I am confused by several ...
- 1,047
2
votes
1
answer
304
views
Fabry-Perot Interferometer
let's consider a Fabry-Perot interferometer:
Illumination is provided by a diffuse source, and its rays are focused towards the cavity by a lens. Inside the cavity there are multiple reflections and ...
- 1,319
0
votes
1
answer
179
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On the optical equivalent of the Michelson interferometer
This page claims that the Michelson interferometer below
is equivalent to the optical system bellow.
How can it be? Where did the beam splitter go? And in the second system we restrict the incident ...
- 1,292
3
votes
2
answers
7k
views
Fringes of equal inclination (Haidinger fringes) Why is the interference pattern circular?
From Hecht optics 5th edition:
It says 'With an extended source, the symmetry of the setup requires that the interference pattern consists of a series of concentric circular bands centered on the ...
- 753
0
votes
2
answers
582
views
Alignment of Michelson interferometer using IR LED
I am trying to align the Michelson interferometer using 780 nm LED. But I am not getting any interference pattern in the CCD. Initially I align the interferometer using Laser to get the equal path ...
- 11
9
votes
3
answers
650
views
Why does this wavemeter use $3$ mirrors to turn light $180^\circ$ instead of just $2$?
In this geometry of wavemeter, why do we use 3 mirrors instead of just 2 mirrors positioned 45° to each other to turn the light beam 180° around?
- 367
16
votes
5
answers
8k
views
Phase added on reflection at a beam splitter?
If we have light of a particular phase that is incident on a beam splitter, I assume the transmitted beam undergoes no phase change. But I thought that the reflected beam would undergo a phase change ...
