PCO.IMAGING pco.1200 hs, Руководство пользователя

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Chapter 3
‚
Camera Functions
page 19
t
read
t
exp
t
delay
time
t
id
Figure 3.10: Time lapse illustration of the image recording for the
asynchronous image recording and delay time t
delay
> 0 mode.
The arrows indicate the beginning of each image recording
sequence (the times are not drawn to scale).
Image sequence
As opposed to single image recording, sequential image
recording is started by a software start signal (trigger
mode - [auto sequence]) and subsequent images are
quickly recorded in a sequence with the highest possible
quality. The camera determines the optimum exposure
control depending upon the adjusted exposure time t
exp
and the delay time t
delay
. To stop the sequential recording,
the stop button must be clicked. Sequential exposure
control offers six different settings:
-
delay time t
delay
= 0 with
-
t
exp
= t
read
-
t
exp
> t
read
-
t
exp
< t
read
-
delay time t
delay
> 0 with
-
t
exp
= (t
read
+ t
delay
)
-
t
exp
> (t
read
+ t
delay
)
-
t
exp
< (t
read
+ t
delay
)
{t
delay
- delay time, t
exp
- exposure time, t
read
- readout time}
In the case of no delay time, t
delay
= 0, images can be re-
corded immediately, one after another. However, the user
must consider whether the exposure time is smaller, lar-
ger or equal to the readout time.
If the application requires a delay time t
delay
> 0 for image
sequence recording, the user must remember that the de-
lay time is inserted after the readout time, t
read
, as op-
posed to the asynchronous mode, where it is inserted be-
fore the exposure. Again, the user must consider whether
the exposure time is smaller, larger or equal to the read-
out time.
delay time t
delay
= 0
exposure time t
exp
= readout time t
read
t
exp
t
read
time
Figure 3.11:: Time lapse illustration of image recording for the described
settings. The arrow indicates the beginning of the image
recording sequence (the times are not drawn to scale).
The optimal conditions for sequential recording, resulting
in the fastest possible image recording are when the ex-
posure time t
exp
equals the system inherent readout t
read
,
(see Figure 3.11).
User Manual pco.camera status 12/2004