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High Dynamic Range (HDR)
HDR enables imaging of (exceedingly) bright and dark areas in a single scan, replacing dual-scan
setups with dedicated cycles. Simultaneous capture improves system throughput (no overhead
from direction change) and stability / repeatability (close association between dark & bright
image).
Note: In HDR mode image data is collected from 2 TDI arrays; the camera
outputs two rows that will have to be combined to create an HDR image. This
limits the maximum line rate to 150 kHz x 2 (or 200 kHz x 2 for high speed
models).
To adapt to the imaged scene dynamic range, the HDR ratio can be selected, as shown in the table
below. This ratio controls the number of stages used in each TDI pixel array.
Table 25: HDR Mode Stages
HDR Ratio
Main Array Stages
2:1
128
4:1
64
8:1
128
High Full Well
High Full Well (HFW) mode sets both arrays at equal stage count, providing an additional bit of
output data. Processing the upper bits [N..1] provides a 2x Full Well increase at lower Responsivity.
Processing the lower bits [N-1...0] maintains Responsivity with √2 improved NEE
Table 26: High Full Well Mode Stages
Ratio
Main Array Stages
1:1
64
Area Mode
In Area Mode, the camera operates as an area array camera (16,384 x 128 or 8,192 x 128 pixels)
using a two-dimensional array of pixels. Area Mode is useful during setup, both for aligning and
focusing the camera. In sufficiently slow applications, area mode can provide a high-aspect 2D
image.
When selecting TDI Area mode, the Device Scan Type changes to Area scan and the height feature
changes to 128, automatically.
Multifield Modes
The multifield TDI modes allow the output of any combination of the three color arrays; single
colors only (R, G or B), color pairs (RG, RB or GB) or all three colors (RGB).
Linea HS Series Camera User's Manual
Secondary Array Stages
64
16
16
Secondary Array Stages
64
Camera Performance and Features • 65
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