Point Grey Flea3 FL3-U3 - Back Flange Distance; Dust Protection; Mounting with the Case or Mounting Bracket

Point Grey Flea3 USB 3.0 Technical Reference 1 Welcome to Flea3 USB 3.0
1.3.4.1 Back Flange Distance
The Back Flange Distance (BFD) is offset due to the presence of both a 1 mm infrared cutoff (IRC) filter and a 0.5 mm
sensor package window. These two pieces of glass fit between the lens and the sensor image plane. The IRC filter is
installed on color cameras. In monochrome cameras, it is a transparent piece of glass. The sensor package window is
installed by the sensor manufacturer. Both components cause refraction, which requires some offset in flange back
distance to correct.
For more information about the IRC filter, see Infrared Cut-Off Filters on next page.
1.3.5 Dust Protection
The camera housing is designed to prevent dust from falling directly onto the sensor's protective glass surface. This is
achieved by placing a piece of clear glass (monochrome camera models) or an IR cut-off filter (color models) that sits
above the surface of the sensor's glass. A removable plastic retainer keeps this glass/filter system in place. By
increasing the distance between the imaging surface and the location of the potential dust particles, the likelihood of
interference from the dust (assuming non-collimated light) and the possibility of damage to the sensor during cleaning
is reduced.
n Cameras are sealed when they are shipped. To avoid contamination, seals should not
be broken until cameras are ready for assembly at customer's site.
n Use caution when removing the protective glass or filter. Damage to any component of
the optical path voids the Hardware Warranty.
n Removing the protective glass or filter alters the optical path of the camera, and may
result in problems obtaining proper focus with your lens.
Title Article
Removing the IR filter from a color camera
Knowledge Base Article 215
Selecting a lens for your camera
Knowledge Base Article 345
Related Knowledge Base Articles
1.3.6 Mounting with the Case or Mounting Bracket
Using the Case
The case is equipped with the following mounting holes:
n Two (2) M2 x 2mm mounting holes on the top of the case
n Three (3) M3 x 2.5mm mounting holes on the bottom of the case
n Four (4) M2 x 2mm mounting holes on the bottom of the case that can be used to attach the camera directly to
a custom mount or to the tripod mounting bracket
Using the Mounting Bracket
Thetripod mounting bracket is equipped with two (2) M3 and one (1) M2 mounting holes.
Revised 9/27/2012
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