Doug S
Flashlight Enthusiast
I see on the datasheets for the CREE XLamp 7090 series that the viewing angle is listed as 100 degrees. This is pretty far from a true Lambertian pattern which would have a viewing angle of 120. If I had one in my hand, I could answer my own question but I have never seen one. For those who have, does it appear that the reduced [relative to true lambertian] angle is due to the die being recessed into a reflective cup or due to refraction in the dome?
As a related question, does anyone have a link to a document showing the angular intensity distribution for these. Unlike most LED datasheets it is not included on the 7090 datasheets.
TIA
As a related question, does anyone have a link to a document showing the angular intensity distribution for these. Unlike most LED datasheets it is not included on the 7090 datasheets.
TIA