Radiant Flux Loss Due to Focusing Lens?
时间：04-04
整理：3721RD
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Hi,
I am designing a hand torch, it will have 3 different light sources as : White (6500K), Blue(470nm) and UV (370nm).
My white source is composed of 2 chip leds, blue source: 6 chip leds and UV source: 4 chip leds, all different colors mounted on a MCPCB of its own.
I use the same lens set for all colors, which consists of collimator and focusing lenses.
My problem is this:
The torch was measured using an integrating sphere both with and without lens set. The lens seems to drop my radiant flux output:
From 4W to 0,9W for white light.
From 3W to 0,6W for blue light
From 1,8 to 0,5W for UV.
I had expected some loss due to the lens but not this much. I am an electronics engineer and my optics knowledge is pretty non-existent so I would greatly apreciate if someone can tell me if this ratio is too much due to bad design or normal?
Best Regards
I am designing a hand torch, it will have 3 different light sources as : White (6500K), Blue(470nm) and UV (370nm).
My white source is composed of 2 chip leds, blue source: 6 chip leds and UV source: 4 chip leds, all different colors mounted on a MCPCB of its own.
I use the same lens set for all colors, which consists of collimator and focusing lenses.
My problem is this:
The torch was measured using an integrating sphere both with and without lens set. The lens seems to drop my radiant flux output:
From 4W to 0,9W for white light.
From 3W to 0,6W for blue light
From 1,8 to 0,5W for UV.
I had expected some loss due to the lens but not this much. I am an electronics engineer and my optics knowledge is pretty non-existent so I would greatly apreciate if someone can tell me if this ratio is too much due to bad design or normal?
Best Regards
Typical glass transparency is in the area of 90 percent, assuming it's not a special formulation designed to absorb certain wavelengths.
Can you show the optics, drawn to scale?