<s>
In	O
fiber	B-Architecture
optic	I-Architecture
telecommunications	O
,	O
the	O
launch	B-Device
angle	I-Device
has	O
the	O
following	O
meanings	O
:	O
</s>
<s>
The	O
beam	O
divergence	O
at	O
an	O
emitting	O
surface	O
,	O
such	O
as	O
that	O
of	O
a	O
light-emitting	O
diode	O
(	O
LED	O
)	O
,	O
laser	O
,	O
lens	O
,	O
prism	O
,	O
or	O
optical	B-Architecture
fiber	I-Architecture
end	O
face	O
.	O
</s>
<s>
At	O
an	O
end	O
face	O
of	O
an	O
optical	B-Architecture
fiber	I-Architecture
,	O
the	O
angle	O
between	O
an	O
input	O
ray	O
and	O
the	O
fiber	O
axis	O
.	O
</s>
<s>
If	O
the	O
end	O
face	O
of	O
the	O
fiber	O
is	O
perpendicular	O
to	O
the	O
fiber	O
axis	O
,	O
the	O
launch	B-Device
angle	I-Device
is	O
equal	O
to	O
the	O
angle	O
of	O
incidence	O
.	O
</s>
<s>
In	O
baseball	B-Application
,	O
the	O
"	O
launch	B-Device
angle	I-Device
"	O
is	O
the	O
angle	O
,	O
with	O
respect	O
to	O
the	O
ground	O
level	O
at	O
home	O
plate	O
,	O
at	O
which	O
a	O
batted	O
ball	O
leaves	O
the	O
bat	O
.	O
</s>
