Sensor Handling Instructions; Cleaning The Sensor Window; Electrostatic Discharge And The Sensor - Teledyne FLIR A68 Series User Manual

Sensor Handling Instructions

This section reviews proper procedures for handling, cleaning, or storing the A68/A38
camera. Specifically, the A68/A38 sensor needs to be kept clean and away from static
discharge to maintain design performance.
WARNING: Teledyne FLIR does not recommend removing the lens;
keeping the lens in place removes the possibilty of exposing the sensor
to contaminants that require cleaning (FLIR A68/A38 series cameras ship
with lenses attached).
If it is necessary to remove the lens:
•
•

Cleaning the Sensor Window

Dust can obscure pixels, producing dark patches on the sensor response. Dust can
normally be removed by blowing the window surface using a compressed air blower,
unless the dust particles are being held by an electrostatic charge, in which case either
an ionized air blower is necessary.
The sensor window is part of the optical path and should be handled like other optical
components, with extreme care. If the sensor window needs cleaning:
• Always keep the camera vertical, front plate facing down.
• Ensure the shutter is in the open position.
• Use compressed air (30psi maximum) to blow off loose particles. This step alone is
usually sufficient to clean the sensor window. Avoid moving or shaking the
compressed air container and use short bursts of air while moving the camera in the
air stream. Agitating the container will cause condensation to form in the air
stream. Long air bursts will chill the sensor window causing more condensation.
Condensation, even when left to dry naturally, will deposit more particles on the
sensor.
WARNING: Never physically touch the sensor or internal shutter; use
only compressed air for cleaning. Compressed air must not exceed 30psi
or damage may occur to the internal shutter.
• Ensure the lens and interface thread are dust-free before replacing the lens.

Electrostatic Discharge and the Sensor

Cameras sensors containing integrated electronics are susceptible to damage from
electrostatic discharge (ESD). Electrostatic charge introduced to the sensor window
surface can induce charge buildup on the underside of the window that cannot be
readily dissipated by the vacuum in the sensor package cavity. With charge buildup,
problems such as higher image lag or a highly non-uniform response may occur. The
charge normally dissipates within 24 hours and the sensor returns to normal operation.
FLIR A68/A38 Series IR Camera User's Manual
Always keep the camera vertical, front plate facing down.
Do not touch the internal mechanical shutter; any physical contact
to the shutter may render it unusable.
Technical Specifications • 155