8.Features
© China Daheng Group, Inc. Beijing Image Vision Technology Branch 120
MER-502-79U3M/C(-L)
0-24dB
0dB, 0.1dB
MER-502-79U3M(-L) POL
0-24dB
0dB, 0.1dB
MER-503-36U3M/C(-L)
0-24dB
0dB, 0.1dB
MER-630-60U3M/C(-L)
0-24dB
0dB, 0.1dB
MER-1070-14U3M/C(-L)
0-25.9dB
0dB, 0.1dB
MER-1220-32U3M/C(-L)
0-24dB
0dB, 0.1dB
MER-1520-13U3C(-L)
0-22.5dB
0dB, 0.1dB
MER-1810-21U3C(-L)
0-20dB
0dB, 0.1dB
MER-2000-19U3M/C(-L)
0-24dB
0dB, 0.1dB
Table 8-7 MER-U3 series camera analog gain adjustment range
When the analog gain changes, the response curve of the camera changes, as shown in Figure 8-22. The
horizontal axis represents the output signal of the sensor in the camera, and the vertical axis represents
the gray value of the output image. When the amplitude of the sensor output signal remains constant,
increasing the gain makes the response curve steeper, and that makes the image brighter. For every 6dB
increases of the gain, the gray value of the image will double. For example, when the camera has a gain
of 0dB, the image gray value is 126, and if the gain is increased to 6dB, the image gray will increase to
252. Note that increasing the analog gain or digital gain will amplify the image noise.
Figure 8-22 The cameras response curve
