Back Flange Distance; Dust Protection; Mounting With The Case Or Mounting Bracket - Point Grey Gazelle GZL-CL-22C5M-C Technical Reference

Point Grey Gazelle Technical Reference
1.5.1

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 0.55 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.
The resulting C-mount BFD is 18.01 mm.
1.6

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.
Related Knowledge Base Articles
Removing the IR filter from a color camera
Selecting a lens for your camera
1.7

Mounting with the Case or Mounting Bracket

Using the Case
The case is equipped with the following mounting holes:
Four (4) M3x0.5mm mounting holes on the top of the case
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Four (4) M3x0.5mm mounting holes on the bottom of the case that can be used to attach the camera directly to
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a custom mount or to the tripod mounting bracket.
Using the Mounting Bracket
The tripod mounting bracket is equipped with four (4) M3 mounting holes. For more information, see
Dimensions on the previous
Revised 10/31/2013
Copyright ©2011-2013 Point Grey Research Inc.
Cameras are sealed when they are shipped. To avoid contamination, seals should not
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be broken until cameras are ready for assembly at customer's site.
Use caution when removing the protective glass or filter. Damage to any component of
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the optical path voids the Hardware Warranty.
Removing the protective glass or filter alters the optical path of the camera, and may
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result in problems obtaining proper focus with your lens.
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Article
Knowledge Base Article 215
Knowledge Base Article 345
1 Gazelle Specifications
Tripod Adapter
9