Filter
Top Products
Page 44
Functions and Operations
TM/TMC-4200CL Series Progressive Scan Cameras
TABLE 6. Asynchronous Mode Chart
6.5 Dynamic Range Control
FIGURE 59. Output and Blooming
The typical interline transfer CCD has fixed noise levels based on dark current (thermal or KT noise),
pattern noise, and the operating clock speed. In general, the level of the 20 MHz pixel clock CCD at
room temperature is around 20 to 50 electrons. The maximum capacity of CCD charges is limited by the
well capacity at saturation. The range is limited by the structure and the pixel size.
The TM-4200CL uses a CCD with 7.4 µm x 7.4 µm pixel and two-phase vertical shift register structure.
The well capacity is 40,000 electrons. The theoretical dynamic range is 40,000:30 = 1333:1 (60 dB).
Async no Shutter Async Preset and Prog. Shutter PWC
aA <1 line <1 line 6 clk
aB 9.5 line (n + 1) lines + 1024 clk Pulse width + 1024 clk
aC 1024 clk
PIV Fixed Expo PIV PWC Unit
pA 6 6
Pixel
pB 200 200
pC 160 160
pD 320 320
pE 20 20
pF 1 1 Frame
0
20
40
100
60
120
80
0
200
400
600
FL
Lens: F=5.6
Vsub = 10 V
Vsub = 12 V
Vsub = 14 V
Vsub = 16 V
Vsub = 18 V
CCD OUTPUT VOLTAGE
LUMINANCE
Blooming adj. = 13. 5 V
Digital saturation at 16 dB amp
Analog saturation at 20 dB amp
Max. Digital dynamic range at 3 dB amp
140
160
mV
Vsub = 8 V