Extended Shutter - Allied Vision Technologies AVT Marlin Technical Manual

Controlling image capture
Register Name
0xF100020C EXTD_SHUTTER Presence_Inq
The minimum adjustable exposure time set by register is 20 µs.
minimum exposure time of a Marlin F-033 is then:
20 µs + 12 µs = 32 µs

Extended shutter

The exposure time for long-term integration of up to 67 seconds can be
extended via the advanced register: EXTENDED_SHUTTER
Field
---
ExpTime
Table 46: Advanced register: extended shutter
The longest exposure time, 3FFFFFFh, corresponds to 67.11 sec.
The lowest possible value of ExpTime is camera-specific (see
era-specific minimum exposure time
Note
• Exposure times entered via the 81Ch register are mir-
rored in the extended register, but not vice versa.
• Longer integration times not only increase sensitivity,
but may also increase some unwanted effects such as
noise and pixel-to-pixel non-uniformity. Depending on
the application, these effects may limit the longest
usable integration time.
• Changes in this register have immediate effect, even
when the camera is transmitting.
• Extended shutter becomes inactive after writing to a
format/mode/frame rate register.
Bit Description
[0] Indicates presence of this feature (read
only)
[1.. 5] Reserved
[6..31] Exposure time in µs
on page 121).
MARLIN Technical Manual V2.4.0
The real
Table 44: Cam-
122