All Questions
11
questions
8
votes
3
answers
2k
views
If we increased the frequency of HV-AC lines, could we get atmospheric air to excite and illuminate?
I had a thought experiment I wanted to run past some experts.
It starts with CFL light bulbs. CFL light bulbs are light bulbs that use ~500 VAC @ ~20 kHz or more to excite a gas in a light vacuum.
...
- 687
0
votes
0
answers
89
views
Feedback from a 100 W laser power supply
I built a 100 W laser cutter from scratch using a controller from a small laser cutter I had
before (Open Builds Blackbox 4x).
It worked with no problems, but I'm going from a 7 W laser to a 100 W ...
0
votes
1
answer
353
views
Laser Power Control Using Duty Cycle
I have a Coherent Cx-10 CO2 laser that I want to use for laser heating of very small samples at high pressure, so I need to accurately control the laser power. I also have a pulse width modulated ...
1
vote
0
answers
218
views
How to calculate laser power on photodiode?
I am completely lost calculating the power of a laser diode and hope, that someone could help me.
Here is my setup:
OSRAM PL 520 (Type B1 = 50mW) Green Laser Diode
OSRAM SFH 203 Photodiode
The laser ...
- 11
3
votes
1
answer
369
views
85W laser array driver circuit
I have an OSRAM 85W 450nnm laser array.
It's essentially a large 'chip' with 24 integrated laser diodes (break it down they're approx 3.5W diodes each.) The Chinese source I purchased it from also ...
- 39
0
votes
1
answer
773
views
What are my options for supplying power to an M140 M-Type JAPAN 2+ W laser diode running off of a 5A constant current laser driver? [duplicate]
Background: I am building a laser that is running off of an M140 M-Type 2+ W 445 nm laser diode and an adjustable constant current driver.
Here are the specifications for both the driver and the ...
1
vote
1
answer
289
views
Determining LED safety compliance
I have a compliance audit that has been foisted on me from on high - as part of what an external consultancy has highlighted, I now have to prove that the indicator LEDs on a board I designed a long ...
- 4,172
1
vote
1
answer
2k
views
How do I calculate the illuminance of a laser beam?
Does anyone know the equation for this? I am trying to calculate the illuminance of a laser beam. I am shining a laser onto a solar cell. The solar cell's datasheet has graphs with illuminance (lux) ...
- 21
5
votes
2
answers
6k
views
Laser power necessary to cut/etch paper
I want to cut/etch (would be satisfied with just etching, though prefer both) paper with a laser. I have on hand several laser diodes salvaged from various disk drives and a 633 nm 10 mW CO2 laser. I ...
- 275
0
votes
1
answer
293
views
Safe line IR laser which will be seen from 15 meters by camera module
What characteristics (wavelength, mW) IR line laser should have to:
be seen by camera module from 15 meters outdoor in day-light too
safe for eyes
line as big as possible
thickness of line should be ...
- 123
4
votes
2
answers
4k
views
How to connect a laser diode?
I have a circuit fed by a 5V source which receives audio signals, amplifies them, and modulates an LED so the intensity of the LED changes with the voltage.
Ok so far so good. But what I want to do ...
- 12.2k