Photon Focus OEM-D1024E, Руководство пользователя

Страница: 42 / 69

4 Functionality
t
ro
=
t
CLK
* (P
y
* (
P
x
taps
+ LP) + LP)
t
proc
=
t
Normal
+ t
CFR
+ t
FPN
+ t
Skim
t
RAM
=
1
128
* (t
ro
+ 1375 ns) - (t
exp
+ t
proc
)
When the result of t
RAM
is negative, set it to 0.
t
frame
frame time
t
exp
exposure time
t
ro
readout time
t
proc
processing time
t
RAM
RAM refresh time
t
Normal
constant latency
t
CFR
constant frame rate latency, only when CFR is enabled
t
FPN
correction latency, only when correction is enabled
t
Skim
skim latency, only when Skimming is enabled
t
CLK
pixel clock
taps CameraLink taps
P
X
number of pixels in x-direction
P
Y
number of pixels in y-direction (+1, for MV-D1024E-80 and MV-D1024E-160)
LP line pause, constant LP = 8 for all models
OEM-D752E-40 OEM-D1024E-40 OEM-D1024E-80 OEM-D1024E-160
t
exp
10
µ
s - 419 ms 10
µ
s - 419 ms 10
µ
s - 838 ms 25
µ
s - 419 ms
t
Normal
1975 ns 1975 ns 2600 ns 1300 ns
t
CFR
850 ns 850 ns 0 0
t
FPN
150 ns 150 ns 0 0
t
Skim
51.125
µ
s 51.125
µ
s 101.6
µ
s 50.8
µ
s
t
CLK
25 ns 25 ns 25 ns 12.5 ns
taps 1 1 2 2
P
Y
Window H Window H Window H + 1 Window H + 1
Table 4.6: Camera module specific values for frame time calculations
A calculator for calculating the maximum frame rate is available in the support
area of the Photonfocus website. Please use for the calcutions the corresponding
camera model.
40