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Questions tagged [optics]

Optics is a branch of physics describing the behaviors and properties of light (electromagnetic waves). Questions regarding the properties of light, it's interactions with matter and the instruments used to detect and deflect (or concentrate) light should be posted here.

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14 votes
2 answers
705 views

Why are lasers used for concentrated light applications instead of incoherent light sources?

Some laser applications consist simply of concentrating light into a small spot. Two example applications are laser welding and cutting. In these cases a CO2 laser is often used which needs a ...
user3368561's user avatar
4 votes
2 answers
959 views

Periscope camera with a mobile phone, how to make walls not visible on the camera/alternative solution?

I am trying to make like a "periscope" that i can use with a mobile camera. I have made a very quick prototype with two mirrors and it "works" but you can see the interior of the walls so it is not a ...
Carlos Rodrigez's user avatar
3 votes
5 answers
20k views

How can I measure the brightness of a LED?

I would like be able to measure LED brightness using a cost effective instrument. What are the available instruments to measure LED brightness and respective cost effective techniques? Background: I'...
Mahendra Gunawardena's user avatar
3 votes
0 answers
179 views

3D matrix for staggering 5 ten degree wide bands of angle of incidence shifted by target wavelength and optical path difference in arithmetic series

Today, we came up with the idea of creating a 3 dimensional matrix where I simultaneously stagger 3 times 5 times 5 Fabry Perot band-reject interferometeric filters with ten degree wide bands of ...
Frank's user avatar
  • 179
1 vote
3 answers
267 views

Calculating Temperature of an Optical Fiber

Let's say there is 30W of light pumping into the fiber. Parameters: Length of Fiber: 6cm Input - 30 W Output -29W Loss of 1W The diameter of optical fiber is 0.25mm. Since the optical fiber is ...
Dugong98's user avatar
  • 129
1 vote
1 answer
130 views

Heat loss in Optical Fiber

I am conducting a thermal analysis of optical fibers. ( Software used AutoCAD Fusion 360) The Inputs conditions are : Let's assume an input power of 1250W, with an efficiency of 98%. 2% loss which ...
Dugong98's user avatar
  • 129
0 votes
1 answer
188 views

rotating mirror system for shifting a beam?

I am looking for some mirror setup where rotation one or more elements in the mirror setup will allow to shift the beam along its axis. Two mirrors in a galvanometer scanner type setup work well for ...
Mark Legault's user avatar
-1 votes
1 answer
174 views

Is it possible to adapt the design and principle of operation for a tunable microwave photonic notch filter to a visible light photonic notch filter?

I just read the 2015 excellent paper , "Tunable microwave photonic notch filter based on sliced broadband optical source". Is it possible to downconvert a microwave photonic notch filter to a visible ...
Frank's user avatar
  • 179
-1 votes
3 answers
227 views

Would it be hard to create a camera that could see the whole electro-magnetic spectrum? [closed]

Usual cameras can capture the visible spectrum, and some others the infra-red spectrum. But the world is so much than that, isn't it? I wonder why cameras that could see a larger electro-magnetic ...
azmeuk's user avatar
  • 107