Dalsa 1M28-SA, Руководство пользователя

Страница: 15 / 54

1M28 and 1M75 User’s Manual PRELIMINARY 15
DALSA 03-32-00525-03
1.5 Spectral Responsivity
Figure 9: 1M28-SA and 1M75-SA Spectral Responsivity
The cameras are shipped without any filters. The quantum response is only limited by the
physics of silicon in manufacturing technologies. This permits applications in the near UV
as well as in the IR Band. For classical visible applications, consider the use of IR stop
filters to increase the sharpness of the images since commercial lenses often cannot
provide proper focalization over such a large spectrum.
Note: Although not shown, the cameras are responsive to light from 380 to 1100nm.
1.6 Region of Interest (ROI)
The CMOS sensor allows you access to subregions of the pixel matrix through the region
of interest function. The benefit of limiting the region of interest is the resulting increase
in frame rate.
In Y direction the ROI can be placed arbitrarily, and can be as small as a single line. The
frame rate increases linearly with a reduction in lines read out.
In X direction the ROI must include at least 4 columns for the 1M28 camera and at least 8
columns for the 1M75. If this condition is respected, the speed increase in column
direction is also linear to the reduction in read out columns.
Theoretically, the smallest ROI is 4 columns x 1 row for the 1M28, and 8 columns x 1 row
for the 1M75.
Table 3: Max Frame Rate versus Resolution (Exposure Time = 10µs)
ROI Dimension (col x line) 1M28 1M75
512 x 512 105 Fps 286 Fps
256 x 256 411 Fps 1070 Fps
128 x 128 1587 Fps 3700 Fps
128 x 16 11111 Fps 22000 Fps
Note:
To set the ROI,
refer to Chapter 3.
Software Interface:
Controlling the Camera.