Allied Vision Technologies F-131C Instruction Manual download pdf (Page 52)

Mako Technical Manual V3.0.0

Camera interfaces

Trigger rules

•The end of exposure will always trigger the next readout.

•The end of exposure must always end after the current readout.

•The start of exposure must always correspond with the interline time if

readout is true.

• Exposure start delay equals the readout time minus the registered expo-

sure time.

Triggering during the Idle State

For applications requiring the shortest possible trigger latency and the smallest

possible trigger jitter, the user trigger signal should be applied when imaging

is false and idle is true.

Triggering during the Readout State

For applications requiring the fastest triggering cycle time whereby the camera

image sensor is exposing and reading out simultaneously, the user trigger sig-

nal should be applied as soon as a valid trigger ready is detected.

In this case, trigger latency and trigger jitter can be up to 1 line time since expo-

sure must always begin on an Interline boundary.

Trigger latency Time delay between the user trigger and the start

of exposure

Trigger jitter Error in the trigger latency time

Trigger ready Indicates to the user that the camera will accept

the next trigger

Registered exposure time Exposure time value currently stored in the camera

memory

Exposure start delay Registered exposure time subtracted from the

Readout time and indicates when the next expo-

sure cycle can begin such that the exposure will

end after the current readout

Interline time Time between sensor row readout cycles

Imaging High when the camera image sensor is either

exposing and/or reading out data

Idle High if the camera image sensor is not exposing

and/or reading out data

Note



The user trigger pulse width should be at least three times the

width of the trigger latency as indicated in Specifications

chapter on page 16.

Term Definition

Table 27: Trigger definitions

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 77 78

No comments

Allied Vision Technologies F-131C Instruction Manual Page 52