SVSi | Scientific Vision Systems

SVSi is the leading supplier of scientific medical equipment including medical cameras,
Endoscopy, Ultrasound, Medicapture, and medical printers, from top brand names as
Sony, Hitachi, Panasonic, Tatung, and Mitsubishi, among others.

HAC: Host Adapter Card.

HAD (Hole Accumulated Diode): CCD technology with improved performance in spectral response, vertical smear and sensitivity. The HAD sensor also introduced a higher pixel count and eletronic shuttering capability.

HD (Horizontal Drive): Signal used to synchronize the line scan rate of the camera to an external source. Mostly used in B/W applications together with VD.

High rate scanning: Capability of a camera to output less than its maximum number of horizontal lines, but at a higher rate. Unlike partial scanning, the lines output in high rate scanning are symmetrical about the optical sensor center. This means that there is normally no need to re-aim the camera when changing from normal to high rate scanning.

Horizontal Resolution: Number of equally spaced vertical black-to-white or white-to-black transitions that the camera is able to reproduce, divided by the aspect ratio (usually 4:3) to make a comparison between horizontal and vertical resolution easier. Usually expressed as TV lines per picture height. Indicates the amount of horizontal details that can be perceived. Horizontal resolution is limited by the number of pixels in one line and by the type of color filter used, if any.

Hyper HAD: A derivative of the HAD sensor that incorporates microscopic lenses mounted over each sensing pixel. Hyper HAD sensors have no perceptible smear and are nearly twice as sensitive as HAD sensors.