ADUX1020 Field of View

Hi,

I would like to use ADUX1020.

So, I have a question. Please help me.

 

Question:

It is stated that the ADUX1020 has a 120 degree viewing angle(data sheet).

Please tell me about the measurement conditions at this time.
What I want to know is the LED and measurement environment used.

The following URL was also used for reference.

https://ez.analog.com/optical_sensing/f/q-a/4545/adux1020-field-of-view/22734#22734

Best Regards,

Naohisa.