Short Exposure Mode

Short Exposure Mode is an acquisition control feature in Emergent Vision cameras that activates a special sensor-level exposure mechanism for ultra-low exposure durations.

When enabled:

• The Exposure node value no longer represents time in microseconds.
• Instead, Exposure becomes an integer that maps directly to the internal S_SHSB register.
• The camera automatically applies the internal timing associated with that value (see the table below).

This mode is designed for precise, low-latency exposure control in high-speed imaging applications, such as:

• Laser profiling
• Motion analysis
• Strobe-synchronized capture

The shortest supported exposure is approximately 1.01 µs, and the longest supported in this mode is 2.46 µs. To use exposure times longer than 2.46 µs, you must disable Short Exposure Mode.

Note: When enabled, this mode also overrides Auto Exposure Maximum Exposure, regardless of trigger mode or frame rate.

Exposure timing table

Each S_SHSB value from 1 to 28 corresponds to a fixed short exposure time. The camera applies the required timing automatically when Short Exposure Mode is enabled.

ShortExposureMode node

• Access mode: Read/Write
• Node type: Boolean

You can use the eSDK API functions to get and set the node’s current value.

For more information about related features, see Acquisition Control Features.