Normal Area Mode; Readout Method (Scan Mode) - Hamamatsu Photonics C11440-42U30 Instruction Manual

9-2

NORMAL AREA MODE

9-2-1

Readout method (Scan mode)

With normal area mode, the camera reads out the CMOS image sensor from the center line to
the top and from the center line to the bottom simultaneously (center line is depicted in red line in
the diagram).
The camera has the following scan modes.
(1) Normal readout
Perform charge readout from camera individually for all pixels.
(2) Binning readout
With this camera, 2×2 binning readout and 4×4 binning are available by adding the
signal of adjacent pixels in the digital domain, Binning readout is a method for
achieving high sensitivity in exchange for losing resolution.
(3) Sub-array readout
Sub-array readout is a procedure only a region of interest is scanned. It is possible to
increase the frame rate by reducing the number of vertical lines scanned. When a
target area is placed in the center of the screen, sub-array readout can perform the
fastest readout. In sub-array readout, binning configuration is enabled.
Size and a position of the readout area can be configured according to the table below.
1×1 (Normal readout)
2×2 binning readout
4×4 binning readout
(4) Rapid Rolling Mode
This readout mode is preferred to be used when acquiring images of fast moving
samples in order to minimize distortion come from rolling shutter.
• Please refer to 9-2-3 [FRAME RATE CALCULATION] about the frame rate of each readout
Note
mode. However, Rapid Rolling mode is different from other modes.
Figure 9-4 Readout method of normal area mode
Binning Size
512 pixels
256 pixels
128 pixels
C11440-42U30/C11440-42U31 Instruction manual_Ver.1.2
Settings
Horizontal
Position Size
32 pixels 8 lines
16 pixels 4 lines
8 pixels 2 lines
Vertical
Position
4 lines
2 lines
1 lines
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