JAI TM-6740GE, Operation Manual

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Page 30
Hardware Introduction
TM-6740GE Hardware
6.2 Features
•
Miniature size and light weight
The printed circuit boards in the TM-6740GE have been arranged to create modular electronics,
giving the camera flexibility. In addition, the use of miniature solid-state components results in a
compact, lightweight camera that is 50.8mm x 50.8mm x 81.5mm in dimensions, and weighs only
155 grams.
• Imager
The TM-6740GE uses a dual-tap progressive scan interline transfer CCD that has the following
features:
-
Resolution of 640 x 480 active pixels for excellent image quality.
-
7.4 x 7.4 µm square pixels for precise dimensional measurement.
-
High-speed electronic shutter capability for high dynamic resolution of moving objects that
eliminates the need for a mechanical shutter.
-
Progressive scan CCD eliminates interlace deterioration of image and increases ease of
computer interface.
-
High sensitivity and low noise at fast scanning. The CCD has an excellent S/N ratio at the
default setting that is greater than 48dB.
-
The CCD has a built-in microlens for increased quantum efficiency.
•
Electronic shutter
The TM-6740GE has a substrate drain-type shutter mechanism which provides superb pictures at
various speeds without smearing. For more information, refer to Section 8.3, “Electronic Shutter,”
on page 44.
• Asynchronous reset
The TM-6740GE captures async reset images and provides single-shot video output with single
FDV. This makes it simpler for an ordinary frame grabber to capture the async reset images. The
TM-6740GE’s asynchronous reset is flexible and accepts external horizontal drive (HD) for phase
locking. When the VINIT (5V) pulse is applied to CC1, it resets the camera's scanning and purging
of the CCD.
The TM-6740GE has four modes to control the asynchronous reset and shutter speed:
-
Async, no shutter. The video signal and FDV are reset by external VINIT.
-
Async direct shutter. The shutter speed control depends on the number of horizontal lines
controlled through the serial commands.
-
Internal shutter speed control . The speed control varies from 1/250 to 1/64,000 sec. The
video signal and FDV starts with internal V reset timing related to shutter speed.
-
External VINIT with pulse width . The duration between pulse edges controls the shutter
speed externally.