37 Spyder2 User’s Manual
03-032-10091-06 Teledyne DALSA
4
Optical, Mechanical, and
Thermal Considerations
4.1 Mechanical Interface
The cam er a’s electronics are housed in a ruggedized lightweight aluminum case. See
Fi gure 9.
Mounting
The cam er a can be mounted usi ng the M 3 holes (metric-threaded) on its base or top, and
on its front plate at the corners.
Environment
The cam er a and cables shoul d be shiel d ed from environmental noise sources for best
operation. The camera should also be kept as cool as possible. The specified operati ng
temperature i s 10–50°C measured at the front plate, (the corresponding ambient
temperature range w ith still air i s 0°C to 37°C). Mounting holes (refer above) allow you to
attach heat sinking.
Thermal Management
For any CCD camera optimal performance is achieved by transferring heat away from the
sensor . Keeping a sensor “ cool” reduces the amount of dark current generated. Dark
current is the leading contributor to FPN, PRNU, dark offset, random noise and other
per formance speci fications, especial l y w hen a camera is significantly gained (i.e. +10 db).
Generally, d ark current doubles for ev ery 7 °C increase i n tem perature at the sensor and
increases linearly with integration time. Further variations in dark current cannot be
compensated for with our flat-field correction algorithms. For this reason, at high gains
(+10 dB), high temperatures (40 °C front plate), and low line rates, it is recommended that
you recalibrate the flat-field coefficients when the temperature shifts by ±10 °C.
N ote: Upon initial power-up the front plate camera temperature is near ambient. It is
recommended to perform flat-fiel d correction once the camera gets w i thin 10 °C of its
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