JAI TMC-775, User Manual

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Hardware Introduction 11
TMC-775/TMC-773
TMC-775/TMC-773 Hardware Instructions
1 Hardware Introduction
1.1 Product description
The TMC-775/TMC-773 are designed to be simple, yet high quality color cameras capable of meeting a variety of
application requirements. Featuring an advanced HAD-type interline transfer CCD imager, these miniaturized high
resolution cameras offer many standard and optional features at a very affordable price. Except for optical format
(TMC-775 has a 1/2" optical format while the TMC-773 has a 1/3” optical format) the two cameras share a
common set of features. Both have an NTSC color video interface. Unless specifically noted, information in this
document regarding camera features and functions applies to both cameras.
1.2 Features
•
Variable electronic shutter and random CCD integration.
The substrate drain-type shutter mechanism provides a superb picture at various speeds without smearing. The
electronic shutter rate can be externally adjusted, from 1/60 to 1/100,000 in discrete steps, by means of an
RS-232 communication port.
• Miniaturized and lightweight.
The use of a CCD image sensor in the video camera module and the development of special mini C-mount lenses
makes it possible to produce a very compact, lightweight and robust camera small enough to operate just like a
remote-head camera system without the back-end electronics.
•
High sensitivity.
The TMC-775/TMC-773 cameras are two of the most low-light-sensitive CCD cameras available today. This
feature is especially important when using the faster shutter speeds. The cameras require only 0.25/0.45 lux
minimum illumination at maximum gain. In general, this allows use of a higher lens f-value while providing greater
depth of field and sharper images.
•
Precise image geometry.
On the CCD image sensor, the photo sensor elements form exact rows both horizontally and vertically so that a
very precise image geometry may be obtained.
•
Low lag/high resistance to image burning.
Since the CCDs are highly resistant to image burning, the cameras may be exposed to bright objects for a long
period of time. Because a “smear” phenomenon may occur when shooting a very bright object, an infrared cutoff
filter is recommended to obtain a clear picture.
•
Integrated Lens Control
The TMC-775/TMC-773 cameras provide external signals which can be used to control motorized lenses.
Features such as Zoom, Focus, and Iris are controllable by means of the RS-232 communication port. The control
signals can support a variety of lenses. See the appendix for further details.
•
Manual gain control and gamma adjustment
These adjustments, which are particularly important in vision system applications, are externally adjustable by
means of the RS-232 communication port
•
Mirror Image (Horizontal)
The TMC-775/TMC-773 cameras provide the capability to horizontally mirror the image. This is externally
selectable by means of the RS-232 communication port.
• Genlock circuit.
A genlock circuit is built in to accept external sync for applications in which external sync is required.