Optical Interface - Dalsa P-2 Series User Manual

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4.2 Optical Interface

Depending upon resolution the cameras can be ordered with different lens mounts. The
following table provides this information.
Lens Mounts
Camera
Configuration
1K, 2 Tap
2K, 2 Tap, 4 Tap
4K, 2 Tap
4K, 4 Tap
6K, 2 Tap
6K, 4 Tap
8K, 2 Tap
8K, 4 Tap
All C-mount and F-mount adapters have the appropriate back focal distance for the lens
type being used. Ensure that the image circle diameter of the lens to be used is as great as
the length of the imaging region. The following table provides information regarding the
lens mount used and the back focal distance. The M72x0.75 lens adapter originated from
the high-end photography standard. Distances to its inner flat surface and the outer flat
surface are provided.
Mount
C-Mount
F-Mount
M72x0.75
Detailed mechanicals, including front plate opening sizes, and the distance from the
sensor die to the opening, can be found in section 4.1 Mechanical Interface.
Note: Lens manufacturers have readily available lens mounts and lenses to adapt to the
M72x0.75 adapter available on the 6K and 8K cameras.
Illumination
The amount and wavelengths of light required to capture useful images depend on the
particular application. Factors include the nature, speed, and spectral characteristics of
objects being imaged, exposure times, light source characteristics, environmental and
acquisition system specifics, and more. DALSA's web site, vfm.dalsa.com, provides an
introduction to this potentially complicated issue. See "Radiometry and Photo
Responsivity" and "Sensitivities in Photometric Units" in the CCD Technology Primer
found under the Application Support link.
It is often more important to consider exposure than illumination. The total amount of
energy (which is related to the total number of photons reaching the sensor) is more
03-32-00493-11
Available Lens Mount
Options
No mount and C-mount
No mount, C-mount and F-mount
No mount and F-mount and
M72x0.75 (10µm model only)
No mount, F-mount and M72x0.75
No mount, F-mount and M72x0.75
No mount, F-mount and M72x0.75
No mount, and M72x0.75
No mount, and M72x0.75
Back Focal Distance (sensor die to
adapter)
17.52 ±0.25mm
46.5 ±0.25mm
19.55mm (nominal)—outer flat surface
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