JAI BB-500 GE, User Manual

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BM-500GE / BB-500GE
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9. Basic Functions
The BM-500GE and BB-500GE cameras are progressive scan cameras with 12, 10 or 8-bit video
output in Gigabit Ethernet. The camera has 1/2, 1/4 or 1/8 partial scanning for faster frame
rates. Vertical binning is also available.
The camera can operate in continuous mode as well as in 4 triggered modes:
- Pre-select (PS)
- Pulse width (PW)
- Sequential trigger (PS)
- Delayed readout (PS,PW)
Depending on the timing of the trigger input in relationship to FVAL (camera internal Frame
valid clock), the start of exposure can be immediate (no-delay, LVAL asynchronous) or
delayed until next LVAL (LVAL synchronous).
In the following section the functions are described in detail.
9.1. Electronic Shutter
BM-500GE / BB-500GE have conventional shutter functions as well as the GenICam standard
“Exposure Time Abs” function.
Preset Shutter
10 steps preset shutter are available: OFF (1/15);
1/30,1/60,1/100,1/250,1/500,1/1,000,1/2,000, 1/4,000,1/8,000,1/10,000 sec. (See the
register map included in the SDK documentation for details how to configure this register -
0xA004)
Programmable Shutter
It is possible to set the shutter speed in the range of 2L to 2072L by 1L unit, in case of Full
Frame operation. When 2072L is set, it is the equivalent of “OFF (1/15)“ or 66.44ms. (See the
register map included in the SDK documentation for details how to configure this register -
0xA008)
Pulse Width Control
With this mode selected the exposure time is controlled by the width of the trigger pulse. The
minimum trigger pulse width is equal to 2L (64µs)
Exposure Auto Continuous ( Auto Shutter )
On this mode, the shutter is continuously functioning in the range of OFF to 1/250 s.
Exposure Time Abs
(GenICam Standard)
This is a function specified in the GenICam standard.
The shutter speed can be entered as an absolute exposure time in microseconds (μs) in
register address 0xA018. The entered absolute time (Time Abs) is then converted to
programmable exposure (PE) value inside the camera.
Minimum Shutter Time 2L Maximum Shutter Time
Normal 32.067µs(1L) * 2L = 64.13 µs 32.067 µs * 2072L≈ 66.44ms
msms1Frame(66.44ms)
V Binning
42.067 µs * 2L = 84.13 µs 42.067 µs * 1039 L ≈ 43.71 ms
Draft
102.066 µs * 2L = 204.132 µs 102.066 µs * 261 L ≈ 26.64 ms