User`s guide

SPECIAL GUIDES
SDK SECTION 9
Page 80
OptAcquire
This is a unique interface whereby a user can choose from a pre-determined list of camera set-up
configurations. The user need only choose how they would like their camera to be optimized, e.g. for
‘Sensitivity and Speed’, ‘Dynamic Range and Speed’, ‘Time Lapse’. Parameters such as EM gain
value, vertical shift speed, vertical clock amplitude, pre-amp sensitivity and horizontal readout speed
will then be optimized accordingly, ‘behind the scenes’. Furthermore, the option exists to create
additional user-defined configurations. Pre-defined OptAcquire modes include:
1. Sensitivity and Speed (EM Amplifier)
Optimized for capturing weak signal at fast frame rates, with single photon sensitivity. Suited to the
majority of EMCCD applications.
2. Dynamic Range and Speed (EM Amplifier)
Configured to deliver optimal dynamic range at fast frame rates. Moderate EM gain applied.
3. Fastest Frame Rate (EM Amplifier)
For when it’s all about speed! Optimized for absolute fastest frame rates of the camera. Especially
effective when combined with sub-array/binning selections.
4. Time Lapse (EM Amplifier)
Configured to capture low light images with time intervals between exposures. Overlap ('frame
transfer') readout is deactivated.
5. Time Lapse and Short Exposures (EM Amplifier)
Configured to minimize vertical smear when using exposure times less than 3ms.
6. EMCCD Highest Dynamic Range (EM Amplifier)
Combines EMCCD low light detection with the absolute highest dynamic range that the camera can
deliver. Since this requires slower readout, frame rate is sacrificed.
7. CCD Highest Dynamic Range (Conventional Amplifier)
Optimized for slow scan CCD detection with highest available dynamic range. Recommended for
brighter signals OR when it is possible to apply long exposures to overcome noise floor.
8. Photon Counting EM
Configuration recommended for photon counting with individual exposures < 10sec.
9. Photon Counting with Long Exposures (> 1sec)
Configuration recommended for photon counting with individual exposures > 1sec.
The following list details the valid acquisition parameters and input values for use with OptAcquire functions.
Parameter: output_amplifier
Type: String
Valid Values: “Conventional or “Electron Multiplying”.
Parameter: frame_transfer
Type: String
Valid Values: “ON” or “OFF”.
Parameter: readout_rate
Type: Float
Valid Values: A valid and supported value which can be retrieved by subsequent calls to
GetNumberHSSpeeds() and GetHSSpeed().