Functions And Operations; Basic Construction; Main Functions; Partial Scan (Sc) - JAI AT-030MCL User Manual

7. Functions and Operations

7.1. Basic construction

A 32-bit microprocessor controls all functions in the AT-030MCL camera. The CCD sensor
output is normalized in CDS and preamplifiers. The signals are then digitized to 14 bits.
Digital gain control, color matrix, look-up tables and setup can do signal processing in 14 bits
before the signal is converted to a 12-, 10- or 8-bit Camera Link signal.
CCD
Light

7.2. Main functions

7.2.1 Partial scan (SC)

The partial scanning function uses the middle of the image vertically to achieve faster frame
rates. This is very useful when capturing and inspecting an image which does not require the
full height. The AT-030MCL has 4 types of pre-set partial scan modes: 2/3, 1/2, 1/4 and 1/8.
In addition to pre-set partial scan modes, the AT-030MCL has a variable partial scan mode.
The offset line can be set from the 1st line to 493th line and the height can also be set from
2 lines to 494 lines. In actual use, the offset line plus height must be within total lines.
AT-030MCL
CCD
CCD
Fig. 9. Principle diagram for signal processing
Fast Dump
Normal Scan
Fast Dump
Fig.10 Partial scan (pre-set)
4
0 50
450 550 600 650 700 750 nm
0
0
4
0 50
450 550 600 650 700 750 nm
0
0
4
0 50
450 550 600 650 700 750 nm
0
0
Example
Mode Start line
2/3 84
1/2 124
1/4 186
1/8 217
- 12 -
R ch
A/D & process circuit
Blemish compensation
Shading compensation
Color matrix
LUT/Gamma/Knee
G ch
A/D & process circuit
Blemish compensation
Shading compensation
Color matrix
LUT/Gamma/Knee
B ch
A/D & process circuit
Blemish compensation
Shading compensation
Color matrix
LUT/Gamma/Knee
End line Frame Rate
411 168.69 fps
208.01 fps
369
307 319.03 fps
276 436.68 fps