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Glossary
GUPPY Technical Manual V4.0.1
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CMOS CMOS (pronounced see-moss ) stands for c omplementary m etal- o xide
s emiconductor
CMOS is a major class of integrated circuits. CMOS chips include micropro-
cessor, microcontroller, static RAM, and other digital logic circuits. The
central characteristic of the technology is that it only uses significant
power when its transistors are switching between on and off states. Con-
sequently, CMOS devices use little power and do not produce as much heat
as other forms of logic. CMOS also allows a high density of logic functions
on a chip.
CMOS image sensors also allow processing circuits to be included on the
same chip, an advantage not possible with CCD sensors, which are also
much more expensive to produce.
C-Mount A standard lens interface used on digital cameras. It is a 1 inch diameter,
32 tpi (=threads per inch) interface with a flange-to-image plane distance
of 17.526 mm.
Color aliasing Color aliasing is caused by the color filters on a single CCD camera. A small
white line on a black background that registers on individual pixels in a
CCD will be interpreted as a line containing single pixels of each of the pri-
mary colors registered.
Color reproduction Color reproduction is the process to reproduce colors on different devices.
Two common methods used for reproducing color are additive color mix-
tures and subtractive color mixtures.
Correlated double
sampling abbr. CDS
Correlated double sampling is a sampling technique used to achieve higher
precision in CCD readout. The sampling circuit is reset to a predetermined
reference level and then the actual pixel voltage is sampled in order to find
the difference between the two. Using the resulting correlation minimizes
read noise, especially in ultra-low-noise cameras.
CS-Mount A relatively new industry standard used on digital cameras. It is a 1 inch
diameter, 32 tpi (=threads per inch) interface with a flange-to-image plane
distance of 12.526 mm.
CSR CSR = C amera_ S tatus_ R egister
CSR architecture A convenient abbreviation of the following reference:
ISO/IEC 13213 : 1994 [ANSI/IEEE Std 1212, 1994 Edition], Information
Technology — Microprocessor systems — Control and Status Register
(CSR) Architecture for Microcomputer Buses.