Pulnix TM-76 Manuál s instrukcemi stáhnout pdf (Strana 22)

Page 16

Operation Mode

TM-75/76 High-Resolution CCD Camera

5 Operation Mode

5.1 No Shutter Cyclic (Continuous Sync) Operation

In Cyclic operation mode, the camera generates its own synchronization signal by itself. It continuously

(cyclically) transfers photo charge at every VD (Vreset) in internal or external HD, VD sync mode.

Since no discharge occurs, the one full frame (1/30 sec or 1/25 sec) is the exposure time for both ﬁelds

in frame accumulation mode. In frame mode, single shot strobing or LED ﬂash can generate a full frame

resolution with frame (two ﬁelds) image capturing. In ﬁeld mode, the accumulation is for 1/60 or 1/50

sec but by taking two ﬁelds (one frame) full frame resolution can be achieved. However, strobe lighting

only generates one ﬁeld image.

FIGURE 9. No Shutter Field/Frame Integration

5.2 High-Speed Continuous (Cyclic) Shutter

5.2.1 Field Mode Integration

Field mode integration is implemented by scanning two rows together (binning) and each pair alternates

as interlace scan is generated. In Field 1, row 1 is binned with row 2, row 3 with row 4,and so on.

In Field 2, the pairs change to row 2 and 3, 4 and 5 and so on. This ﬁeld mode accumulation is effective

for electronic shutter applications as it generates twice as sensitive an image as frame mode. The

electronic shutter output is always one ﬁeld image per shutter.

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