Recent content by FredFlintstone

Thanks for the link. Interesting gear. However they seem limited to 700nm range unless I'm missing something. Cheers.

Sorry if my initial question caused confusion but I have already clarified these points. My intended application is photobiomodulation (PBM) - which is a branch of medicine that has to do with therapy through light, particularly infrared. Most PBM medical devices use LEDs for this purpose. I was...

I believe I have clearly said that I am looking at the feasibility of producing any wavelength in the near infra red. Not everyone is confused - there has been plenty of good points and suggestions in this thread that have been enlightening and helpful - at least to me. So I'm satisfied, and...

Regarding the wavelengths - this is explained in posts 17 and 20 of this thread. Please see post 20 of this thread.

Is this the same thing as frequency? I'm probably looking for 10hz and 40hz So if I need 80mW/cm2 in the bandwidth of 810nm to 850nm, with a 10% filter I need 800mW/cm2

If I pick up "warm white" light LED bulb (array) from the shop, and the colour warmth is defined as 3000 kelvin (yellow-ish), am I right to think it will most likely have 600nm wavelength in it?

Right - got you. Thanks. Ah, now the lights are coming on, lol. That clears it up for me.

In my second post of this thread I gave the power requirement, around 80mW/cm2. The wavelength range and power can be obtained from LEDs - this is how most devices in biophotomodulation field are made. But I was hoping it could be obtained by using a white light source and filtered because this...

I'm trying to understand you, but if you mix light from a red LED and a green LED will you not get yellow light which has a wavelength of approx 600nm, even from an LCD monitor?

I understand the white lamp could be hot but I'm not sure I understand your last sentence about "take too high a percentage"... how does this relate to heat?

Thank you. I'll take a closer look at this.

I have been trying to determine the feasibility of producing ANY given wavelength within the near infrared which between 700nm and 900nm. I asked to start with about 700nm (which I referred to as "red-ish") just to narrow the enquiry, presuming that whatever is true of it should be true of other...

Actually, this type of filter looks really good, but costly in the quantity I want it. If only I could get that tech on a continuous length of acrylic or perspex.

I have a few specific wavelengths I'm looking at, but the feasibility of getting one will hopefully apply to others. Right now I'm also looking at 810-850nm. Thing is, it has to be within a limited budget. I will look into your solution but it sounds like it might be out of my reach. Thanks.

The LCD monitor was not a bad idea but they are not able to put out the amount of energy needed - which is a good thing normally! Yes optical wavelength filters would be better but way more expensive.