
16
The Integration Period has a duration of N fields; image transfer and readout begin immediately.
The total integration time is therefore can be computed as follows:
T
int
= N * (16.66mS) - (CCD flush period)
Where N is the number of fields during which charge is accumulated on the CCD.
For N = 6, the nominal integration period is 6 * 16.66mS = 99.99mS.
More accurately (for N = 6),
T
int
= 99.99mS - 140
µ
sec
Note (1): Only one field (or half the normal vertical resolution) per integration period is obtained.
Note (2): Since charge transfer is initiated only at the end of the N Field integration period
(before the readout field), there is no image generated by the camera except during the one
Readout field due to each INTEGRATION sequence. Therefore the video output is blanked, until
the next Readout field.
Note (3): There is no theoretical upper limit to the integration period. In reality, the upper limit is
determined by the amount of noise that can be tolerated and the dynamic range required by the
application. The lower limit is determined by the amount of light during image transfer and the
amount of smear that can be tolerated by the application. Cooling the CCD will result in longer
usable integration periods due to a reduction in the dark current of the CCD.
Содержание DigitEyes Series
Страница 14: ...9 Figure 4 3 TC 245 Gate Level Drawing Texas Instruments 1994 ...
Страница 61: ...56 12 Appendix D Camera Mechanical Drawings Figure 12 1 Camera Mechanical Drawings ...
Страница 63: ...58 Figure 13 2 Camera Noise Spectrum Min Gain Bandwidth 10kHz to 4 2MHz ...
Страница 64: ...59 Figure 13 3 Camera Noise Spectrum Max Gain Bandwidth 100kHz to 4 2Mhz ...
Страница 65: ...60 Figure 13 4 Camera Noise Spectrum Max Gain Bandwidth 10kHz to full ...