Basler L301kc, Инструкция по установке и эксплуатации

Страница: 45 / 124

Operation and Features
Basler L301kc 3-11
DRAFT
3.5.2 Camera Operating Requirements for Proper
Spatial Correction
To achieve proper spatial correction, certain camera operating requirements must be met.
Exposure Start Control
Exposure start must be triggered with an ExSync signal.
Use of the programmable exposure mode is strongly recommended to ensure uniform exposure.
The edge controlled or level controlled exposure modes can be used but only if the conveyor
speed is 100% stable. If the conveyor speed is not stable, unacceptable variations in exposure
time will result.
Output Mode
The camera must be set for an 8 bit output mode. Spatial correction is disabled when the camera
is used in a 10 bit mode.
Test Images
The camera must not be set for test image one or for test image two. When either of these test
images is active, the
Spatial Correction Delay in Lines is automatically set to zero. This disables
spatial correction.
IR Cut Filter
Because color filter arrays become transparent after 700 nm, use of a suitable IR cut filter is
strongly recommended to maintain spectral balance.
If an IR cut filter is not used, the colors in the captured images may not match the colors in the
object. For example, a green color in the object may appear brown in the captured image.
Lack of an IR cut filter can also result in very poor color separation. In some cases, captured
images may appear to be almost monochrome because they do not provide enough color
information to produce a full color image.