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Functions and Operations

TABLE 6.

Asynchronous Mode Chart

 

 

 

 

 

 

 

 

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

 

 

 

 

 

pB

200

200

 

 

 

 

 

pC

160

160

Pixel

 

 

 

pD

320

320

 

 

 

 

 

pE

20

20

 

 

 

 

 

pF

1

1

Frame

 

 

 

 

6.5 Dynamic Range Control

FIGURE 59. Output and Blooming

Blooming adj. = 13. 5 V

Lens: F=5.6

mV

Max. Digital dynamic range at 3 dB amp

600

Vsub = 8 V

CCD OUTPUT VOLTAGE

Vsub = 10 V

Vsub = 12 V

400

Vsub = 14 V

Vsub = 16 V

200

 

 

 

 

 

Digital saturation at 16 dB amp

 

 

Vsub = 18 V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

Analog saturation at 20 dB amp

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

20

40

60

80

100

120

140

160

 

 

 

 

 

 

 

LUMINANCE

 

 

 

FL

 

 

 

 

 

 

 

 

 

 

 

 

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).

TM/TMC-4200CL Series Progressive Scan Cameras

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Image 54
JAI TM/TMC-4200CL Dynamic Range Control, Asynchronous Mode Chart, Async no Shutter Async Preset and Prog. Shutter