The Hamamatsu Orca flash is digital CMOS camera. It supports USB3 or direct camera link connectivity.

  • USB 3.0 -> 30fps
  • Cameralink -> 100fps

The Lima plugin controls an Orca camera (ORCA-Flash4.0 V2, C11440-22CU V2) under Windows. It is based on the Hamamatsu DCAM-API SDK.


Host OS is Windows (32 or 64 bits). The driver must be installed on the host system.

Initialization and Capabilities

In order to help people understand how the camera plugin has been implemented in LImA, this section provides some important informations about the developer’s choices.

Camera initialization

There is nothing specific. The available cameras must first be enumerated. A selected camera can then be inited. (Note that at the moment only one camera will be handled by the pluggin.)

Std capabilites

This plugin has been implemented in respect of the mandatory capabilites but with some limitations according to some programmer’s choices. We only provide here extra information for a better understanding of the capabilities of the Orca camera.

  • HwDetInfo
  • Max image size is : 2048 * 2048
  • 16 bit unsigned type is supported
  • Pixel size: 6.5µm * 6.5µm
  • Detector type: Scientific CMOS sensor FL-400
  • HwSync

Supported trigger types are:

  • IntTrig
  • ExtTrigSingle
  • ExtGate (not yet implemented)

Optional capabilities

  • HwBin

Possible binning values are:

  • 1 * 1
  • 2 * 2
  • 4 * 4
  • HwRoi

The Subarray mode allows defining a rectangle for ROI:

  • X: 0 to 2044
  • Width: 4 to 2048
  • Y: 0 to 2044
  • Heigth: 4 to 2048
  • HwShutter
  • There is no shutter control available in the DCAM-API SDK.
  • Cooling
  • There is no cooler sensor access or control to the cooling system via the DCAM-API SDK.
  • Cooling management is autonomous and can only be chosen between air or water cooling outside the sdk.
  • Readout mode
  • Two readout modes are available: SLOW (30fps at full frame) or NORMAL (100fps at full frame).



How to use

The following set of functions is used as a wrapper to the DCAM-API SDK. Code can be found in the HamamatsuDCAMSDKHelper.cpp file.

dcam_init_open();                       // initialize DCAM-API and get a camera handle.
dcamex_setsubarrayrect();               // Initialize the subarray mode (defines a ROI -rectangle-)
dcamex_getsubarrayrect();               // Get the current subarray parameters (get ROI settings)
dcamex_getimagewidth();                 // Get the width of the image
dcamex_getimageheight();                // Get the height of the image
dcamex_getfeatureinq();                 // Get the settings of a feature (ex: exposure time)
dcamex_getbitsperchannel();             // Get the number of bits per channel

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