I don’t think it will create any artefacts at all. Didn’t make it in unique rotation because the dual dies in each emitter are too wide apart to each other and already asymmetric.
If in any case there’s artefacts at all, then frosted TIR should cure it easily. It fits all Carclo 106xx
Clemence, if you have a next order from Nichia, could you ask for some 219D samples? Or did you already have some (can’t remember). I really wonder why the 219D exists while none of the specs are significantly different from the 219C. Or are they simply cheaper?
I’m really hoping that this is not another typo. If this is the case then dedoming this LED would be the easiest and cleanest dedoming job with less lumen loss as usual. The idea of using multi refractive index material was introduced three years ago by a chinese scientist. He demonstrated more than 21% output using the same die. He used 5 layers silicone from the high to low to slowly reduce the RI transition to extract more photons off the die.
I thought the question was what’s new in 119D/219D over 119C/219C. But yes, 119 package is better thermally compared to 219 package on two pads board like my VR16S1. Larger thermal pad area
And probably somewhat higher current handling too