JAI AD-081GE - Manual (Page 59)

AD-081GE
58
In PWC mode, when “Smearless ON ” is selected, the actual accumulation time is the trigger
pulse width minus the Smearless active period (199L+2L).
If the trigger pulse width is shorter than 199L, the exposure is not active.
10.5.8 Smearless mode
This function can be used to reduce the smear coming from bright parts of the object. This is
effective for both EPS and PWC trigger modes. Before the accumulation starts, any charge that
is stored in the pixel is dumped by a high-speed transfer. This can reduce the smear at the
upper part of the object but the lower part is unaffected.
At the falling edge of the trigger pulse the high speed transfer starts. This period is 8.32ms
which is 198L. Thereafter the residual charge in the horizontal CCD register is read out in 1L
and the new exposure starts. This function is available for both full scan and partial scan.
Fig 25. PWC timing chart with Smearless ON
Fig 51 PWC timing chart with Smearless ON
DVA L
DA TA OUT
O B
1
7L
2 3 4 5 7
6
5
7
6
4
7
6
6
7
6
8
7
6 7
R e
s e
rv
e d
2 L
O B
R e
s e
rv
ed
L V A L
S U B
S G
F V A L
E x t . T r i g 1
t2
W h e n th e L V A L S y n c A c c um .
: t1 = 0 . 5 to 1 . 5 L , t2 = 1 . 5 L
t1
1 9 8 L
E x p o s u r
P e r i o d
W h e n th e L V A L A s y n c A c c um
.
: t1 = 0 . 5 L , t2 = 1 . 0 to 2 . 0 L
S me a r L e s s T r a n s f o r
E E N
M i n . : 2 0 0 L ( 1 9 8 L + 2 L ) ~ M a x . : 6 0V ( 4 7 5 2 0 L )
7 8 8 L
7 6 8 L
E ffective L ines
6 L 5 L