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9-2 Reference — DCS 465 Camera Back
DCS 465 Camera Back and Imager
The KODAK camera back incorporates a charge coupled device (CCD)
full-frame imager that collects light resulting in a file containing 6.0
megabytes of data. There are two versions of the imager, one in the color
camera back, and another in the monochrome camera back. The CCD
imager is 18.4 mm x 27.6 mm. This produces a field of view equal to
using a lens with 1.3 times the focal length of the lens in use.
3060 pixels
2036 pixels
When you take a picture, light passes through the lens onto the imager;
each pixel receives and stores a specified amount of light. These data —
for one image — leave the imager chip in analog form, and are converted
to digital form and stored with other data in dynamic random access
memory (DRAM).
Once the data are in DRAM, the data from the image are transferred to the
PCMCIA card. Hardware in the camera back generates a thumbnail from
the image data. The thumbnail is a subsample of image data, with data
sampled from every sixteenth pixel. The thumbnail is subsequently stored
with the full image on the PCMCIA card.