Pulnix TM-1300 Manuel d'instructions télécharger pdf (Page 22)

Page 14

Operation

TM-4000CL Series Progressive Scan Shutter Cameras

FIGURE 5. No-Delay Shutter and Read-Out Inhibit

3.6 Dynamic Range Control

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-4000CL 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).

VINIT (External Pulse Width Control Trigger)

No-Delay Shutter (All cameras)

No-delay Exposure

Discharge

Transfer Gate

ROI Control: Camera #1

Camera #1 Video

ROI Control: Camera #2

Camera #2 Video

ROI pulse width: Min. 1H to 1frame

Max. 1H delay

FDV/Vsync

100

120

200

400

600

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

Vsub = 8 V

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 39 40

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Pulnix TM-1300 Manuel d'instructions Page 22

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