Inspired by Djozz experiment, I decided to find a way to reduce the output loss in the super popular Carclo optics. In this case I’m using the triple 10507
LED used were the well known Cree XPG to represent small die LED. Next I will repeat the test with Nichia 319A to represent bigger die LEDs. I carefully enlarge the three positioning hole in Noctigon MCPCB to 2,7mm. This way the optic can sit directly on the LED while still maintain the correct position. All three optic legs are snugly fit in the holes.
The idea is to capture as much light as possible from the LED. Carclo optics designed for multiple brands of LED with various heights. So the LED input aperture height adjusted to accommodate the tallest LED this optic targeted, plus a little bit for safety clearance. This is OK with tall LED but inefficient with thin and(or) large LES size LEDs such as E21A, 219B, XPL-HI, XML2, Samsung LH351D, etc…
XPG = 0,73mm thick; 319A = 0,52mm thick; Carclo 10507 clearance = 1mm
This also means the focal point vary between LEDs. I found the best focus attained with the focal point set to slightly below the phosphor layer. In this experiment the goal is not the best focus or the prettiest beam.
Cree XPG
Nichia 319A
319A has thinner ceramic substrate and larger LES
RESULT
All test done in 26°C - 27°C air conditioned room. 285mA current
So, the option are clear: higher intensity or brighter output? It’s your choice. I prefer the latter because by making use all of the emitted light we should get nicer mixed tint, especially optics with micro lenses (peebled).
Happy modding…
- Clemence