Basler A400K Manual de usuario descargar pdf (Pagina 135)

Features

Basler aviator Camera Link 127

7.8.5 Exposure Auto

Exposure Auto is the "automatic" counterpart to manually setting the Exposure Time Abs

parameter. The exposure auto function automatically adjusts the Exposure Time Abs parameter.

within set limits until a target average gray value for the pixel data from Auto Function AOI 1 is

reached.

The exposure auto function can be operated in the "once" and continuous" modes of operation.

If Auto Function AOI 1 does not overlap the Image AOI (see the "Auto Function AOI" section), the

pixel data from Auto Function AOI 1 will not be used to control the exposure time. Instead, the

current manual setting for the Exposure Time Abs parameter will control the exposure time.

The exposure auto function and the gain auto function can be used at the same time. In this case,

however, you must also set the auto function profile feature.

When trigger width exposure mode is selected, the exposure auto function is not available.

For more information about the "manual" exposure time setting, see Section 5.4 on page 75.

For more information about the trigger width exposure mode, see Section 5.3.3.2 on page 71.

For more information about the auto function profile Section 7.8.6 on page 130.

The limits within which the camera will adjust the Auto Exposure Time Abs parameter are defined

by the Auto Exposure Time Abs Upper Limit and the Auto Exposure Time Abs Lower Limit

parameters. The current minimum and the maximum allowed settings for the Auto Exposure Time

Abs Upper Limit parameter and the Auto Exposure Time Abs Lower Limit parameters depend on

the minimum allowed and maximum possible exposure time for your camera model.

The Auto Target Value parameter defines the target average gray value that the exposure auto

function will attempt to achieve when it is automatically adjusting the Exposure Time Abs value. The

target average gray value can range from 50 (black) to 205 (white) when the camera is set for 8 bit

output. When the camera is set for 10 bit output, the target gray value can range from 200 to 820.

And when the camera is set for 12 bit output, the target gray value can range from 800 to 3280.

Note that on cameras delivered from the factory, the exposure auto, gain auto, and

white balance auto (on color cameras) functions will all become enabled

whenever you power on or reset the camera. This behavior happens due to the

way that the camera’s configuration sets are set in the factory. More specifically, it

happens because the auto functions factory setup is selected as the default

configuration set and the default configuration set is designated as the "startup"

set. To change this behavior, you must change the configuration set settings. For

more information about configuration sets, see Section 7.19 on page 170.

The exposure auto function will not work if the camera’s exposure mode is set to

trigger width. For more information about the trigger width exposure mode, see

Section 5.3.3.2 on page 71.

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Basler A400K Manual de usuario Pagina 135