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# Tag Info

## Hot answers tagged photonics

3 votes
Accepted

### Heat loss in Optical Fiber

If you increase the length of the fibre, you will get more reasonable results. The losses -in my mind- need to be distributed along the entire length of the fiber . Currently, you seem to model a very ...
• 24.4k
3 votes
Accepted

### Calculating Temperature of an Optical Fiber

If a model does not reflect reality, the model is not accurate enough for that situation. Consider some of the minutia in the workings of light. First an alternate model for the fiber: As light ...
• 1,352
2 votes

### rotating mirror system for shifting a beam?

You could use a slab of glass or other transparent medium with a different refractive index then air. The slab should have two surfaces which are as parallel as possible and be mounted on a two axis ...
• 1,653
1 vote

### Imaging base of HDR range

I could be misinterpreting the article, but to my understanding, I believe the key number to look at is the "full well capacity" of the sensor. They are quoting this as 785,000 electrons. ...
• 2,646
1 vote

### Calculating Temperature of an Optical Fiber

Your assumption on temperature increase is flawed You can't convert watts to temperature directly unless the object is perfectly insulated and the application of heat has a limited time. The equation ...
• 6,969
1 vote

### Calculating Temperature of an Optical Fiber

After the exchange of comments, (more specifically) that the glass is transparent, my "guess" is the following: You state that the signal power loss is in the order of 1 W. Assuming the ...
• 24.4k
1 vote

### how to implement autofocus for video projector

U can use a mirror for feedback of the projected image and a SLR as in cameras (a piece of glass at an 45` angle to measure the difference between projected and image onthe screen and approp. adjust ...
1 vote
Accepted

### What are some examples of laser-based additive manufacturing techniques?

Here is an incomplete list of laser-based additive manufacturing, based on my comment. I might expand on it later: Selective laser melting/sintering (SLM/SLS): a laser beam melts/sinters a layer of ...
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1 vote

### LED Lumen Calculations

Lumen (luminous flux) is irrelevant to the distance where the LED's being measured from, you can take lumen as a total light energy measured around that LED (captured by an all-rounded measuring ...
• 11
1 vote

### Epoxy that can withstand up to 800C and is optically transparent?

You will need to go for glass and casting. High temp silicones and epoxies don't go to 800 deg C and they are not clear anywhere near their high temperature variants. Closest I know is a murky clear &...
• 1,352

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