Need the appropriate light sensor

U

UltimateElectro

New Member

• Sep 27, 2014

• #1

Hi,

I'm trying to design a circuit to detect triboluminescence emitted by crystals. The nature of the light is it lasts only for a fraction of a second and it's very weak in intensity. Assuming that I can make the appropriate environment, like what is described here. I need to make sure that the light sensor can detect the light with such a short duration. Any recommendations for the type of light sensor I need to go by, would be highly appreciated.

 

Last edited by a moderator: Feb 15, 2022

ronsimpson

Well-Known Member

Most Helpful Member

• Sep 27, 2014

• #2

the light is it lasts only for a fraction of a second

Click to expand...

do you know more about how long?
What type of light? IR, UV, Red, ?
Very sensitive light sensor are a little slow.
Strong light can be detected in 1/1,000,000 of a second.
Van you put the crystal in a dark box with zero light?

 

U

UltimateElectro

New Member

• Sep 27, 2014

• #3

I don't know the exact length, but it's not less than a quarter of a second for sure, if that helps. It emits visible light, usually orange, yellow, or hue. I can put it in a dark box, sure.

 

audioguru

Well-Known Member

Most Helpful Member

• Sep 27, 2014

• #4

The duration of the dim burst of light depends on how you smash the crystal or the duration you pull adhesive tape off.
If you hit the crystal with a hammer then the duration of the light is extremely short. If you pull off a long piece of tape then it might make a few seconds of light.

 

U

UltimateElectro

New Member

• Sep 27, 2014

• #5

Oh, that's valuable information. Thank you very much. Given that, what sensor I should go about?

 

audioguru

Well-Known Member

Most Helpful Member

• Sep 27, 2014

• #6

I think a low lux video camera will work.

 

S

Semaphöre

New Member

• Sep 27, 2014

• #7

Have you looked into avalanche photodiodes? I think they'd be handy for what you're trying to do...seem a bit pricey, but I know they're used for detecting even single photons. Might also be overkill

 

Last edited: Sep 27, 2014

K

KeepItSimpleStupid

Well-Known Member

Most Helpful Member

• Sep 27, 2014

• #8

I think you need to research integrating spheres: See: **broken link removed**

and https://www.thorlabs.com/newgrouppa...&pn=IS236A-4&gclid=CNCHrPqJg8ECFcti7Aodpy0AZw

 

ronsimpson

Well-Known Member

Most Helpful Member

• Sep 28, 2014

• #9

audioguru said:

I think a low lux video camera will work.

Click to expand...

I like the idea of the video camera. It has a million light sensors. Not as sensitive as you want but it will give you more information. Maybe light comes form one end of the crystal and not the other. My camera has red, green, blue and IR sensors. You can replay the video. Many people have a old camera not in use.