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4 vertical binning (vb), 5 electronic shutter (sm), At-200ge – JAI AT-200GE User Manual

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AT-200GE

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9.3.4 Vertical Binning (VB)
Vertical Binning mode is a function where the signal charges from 2 adjacent (vertical) pixels
are added together and read out as one pixel. Binning results in half vertical resolution but
higher frame rate and sensitivity. The charge accumulated in 2 adjacent lines is added
together in the horizontal CCD register. This is done by providing two pulses to the vertical
CCD register for each line read out. Vertical binning cannot be used together with partial
scanning.

Fig.24 Vertical Binning

Setting

Effective/total

Horizontal
Frequency

Frame rate

Off (No V Binning))

1236 /1252

19.276 KHz

15.40 frames/sec.

2:1 V Binning

618 / 628

17.381 KHz

27.68 frames /sec.

9.3.5 Electronic shutter (SM)
The AT-200GE has the following shutter modes.

Programmable Exposure (PE)
The setting command is PE and the exposure time can be controlled from 0L to 1252L in 1
LVAL units (51.88µs). Calculating actual shutter speed requires adding 0.5L to the
setting value. This is because there is 0.5L overhead.
The resulting range is from 0.5LVAL to 1252LVAL. Setting 1252L is Shutter OFF.
Programmable exposure can be set for R, G and B together or individually in EPS and RCT
modes.

The shutter speed for each operating mode is shown below.
Mode

Read Out

Minimum shutter speed

Maximum
shutter speed

Continuous
Edge Pre-select

Full
Partial

25.94 µs at PE=0(1/38,550s)

51.88µs x
1252L=1 Frame
(64.95 ms)

V binning

28.77 μs at PE=0(1/34,760s)

Pulse Width

Full
Partial

51.88 µs x 2L+25.94 µs( 0.5L)=
129.7 µs (≒1/7,700s)(Note)

30 Frames

( 2 seconds )

V Binning

57.54 µs x 2L + 28.77 µs(0.5L)=
143.85µs (≒1/6,950s)(Note)

Note: In Pulse Width mode, the minimum trigger pulse width requires more than 2LVAL.

Horizontal Direction

V

er

ti

ca

l

D

ir

ec

ti

o

n

Full

Full

1/2

Binning

Frame rate 25.21 fps

Frame rate 40.98 fps

Normal full scanning

2 line Vertical Binning

H

H

Horizontal CCD Register

S/H

Reset

Video

Out

Xsg1

V

er

tic

al CC
D

Re

gi

st

er

Pixel