Gain - FLIR GRASSHOPPER 3 Series Technical Reference

The time between the end of exposure for consecutive frames is always constant. However, if the exposure time
is continually changing (e.g. being controlled by Auto Exposure), the time between the beginning of consecutive
integrations will change. If the exposure time is constant, the time between integrations will also be constant.
The camera continually exposes and reads image data off of the sensor under the following conditions:
1. The camera is powered up; and
2. The camera is in free running, not asynchronous trigger, mode. When in trigger mode, the camera simply
clears the sensor and does not read the data off the sensor.
The camera continues to expose images even when data transfer is disabled and images are not being streamed
to the computer. The camera continues exposing images in order to keep things such as the auto exposure
algorithm (if enabled) running. This ensures that when a user starts requesting images, the first image received is
properly exposed.
When operating in free-running mode, changes to the exposure value take effect with the next captured image, or
the one after next. Changes to exposure in asynchronous trigger mode generally take effect on the next trigger.
To adjust exposure:
GenICam—Acquisition Control
n
FlyCapture
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To enable extended exposure:
FlyCapture SDK example
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8.10 Gain

Gain is the amount of amplification that is applied to a pixel by the A/D converter. An increase in gain can result in
a brighter image but also an increase in noise.
The Grasshopper3 PGE supports Continuous and Once gain modes. The A/D converter provides a PxGA gain
stage (white balance/preamp) and VGA gain stage. The main VGA gain stage is available to the user, and is
variable between models per the table below.
2/10/2017
©2013-2017
FLIR Integrated Imaging
Solutions Inc. All rights reserved.
API—Setting Shutter Using the FlyCapture API
program—ExtendedShutterEx
Model
GS3-PGE-23S6M-C 0 dB to 29.99 dB
GS3-PGE-23S6C-C 0 dB to 29.99 dB
GS3-PGE-50S5M-C -6.510 dB to 24 dB, increment 0.985 dB
GS3-PGE-50S5C-C -6.510 dB to 24 dB, increment 0.985 dB
GS3-PGE-60S6M-C -6.158 dB to 24 dB, increment 0.985 dB
GS3-PGE-60S6C-C -6.158 dB to 24 dB, increment 0.985 dB
GS3-PGE-91S6M-C -9.431 dB to 24 dB, increment 0.035 dB
GS3-PGE-91S6C-C -9.431 dB to 24 dB, increment 0.035 dB
Grasshopper
8 Grasshopper3 PGE Attributes
Range
®
3 PGE Technical Reference
Firmware
1.11.3.0
1.11.3.0
1.6.3.0
1.6.3.0
1.9.3.0
1.9.3.0
1.5.3.0
1.5.3.0
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