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Imaging Cameras Hamamatsu Cameras Orca Flash 4 C-MOS
Image A (left), HeLa cells labeled with d2EosFP. Left: reconstructed PALM image. Right: single TIRF imagefrom data used for reconstruction. (Images courtesy of Prof. Zhen-li Huang, Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology.) Scientists have used EM-CCDs for very low-light, often high-speed imaging such as TIRF or spinning disk confocal, while they have relied on cooled CCDs for other fluorescence applications such as GFP or multichannel imaging. But the ORCA-Flash4.0 is changing all of that. Now one camera covers a wide range of imaging needs—including localization microscopy, TIRF microscopy, live cell GFP, high-speed calcium ion imaging, FRET, real-time confocal microscopy, and many more.
Image A (left), HeLa cells labeled with d2EosFP. Left: reconstructed PALM image. Right: single TIRF imagefrom data used for reconstruction. (Images courtesy of Prof. Zhen-li Huang, Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology.) Scientists have used EM-CCDs for very low-light, often high-speed imaging such as TIRF or spinning disk confocal, while they have relied on cooled CCDs for other fluorescence applications such as GFP or multichannel imaging. But the ORCA-Flash4.0 is changing all of that. Now one camera covers a wide range of imaging needs—including localization microscopy, TIRF microscopy, live cell GFP, high-speed calcium ion imaging, FRET, real-time confocal microscopy, and many more.
To help you determine if the ORCA-Flash4.0 is suitable for your imaging needs, wavelength sensitivity and other important parameters are summarized in the table below.
| Image sensor type | 4.0 megapixel scientific CMOS |
| Wavelength sensitivity | Visable |
| Intensity of signal | Low light |
| Frame rate at full resolution | 100 frames per second |
| Exposure time | 9.7 microseconds to 10 seconds |
| Spatial resolution (pixel size) | 6.5 x 6.5 microns |
| Features | Benefits |
| High sensitivity: high QE (over 70% at 600 nm) and low noise (1.3 electrons) | Extreme versatility |
| 100 fps readout at full resolution and up to 25,600 fps with a small region of interest | Able to capture fast events such as high-speed calcium ion imaging |
| 4.0 megapixels | 2.5X larger field of view than that of a standard EM-CCD camera |
| 6.5 x 6.5 µm pixel size | Much finer details can be resolved |
| Multiple external trigger and timing output functions | Synchronization with peripheral equipment |
High QE + Low Noise = High Sensitivity
The ORCA-Flash4.0's high sensitivity results from its high quantum efficiency (QE) and low noise. The camera's Gen II sCMOS sensor provides high QE across the range of wavelengths most commonly used in fluorescence microscopy, with QE values over 70% at 600 nm and 50% at 750 nm. Add the low read noise of 1.3 electrons at 100 fps without EM-CCD multiplicative noise, and you have an extremely sensitive and versatile camera. You can detect signal at low light levels, compare small changes in intensity, and discriminate small signals amid large backgrounds—with ease.
High speed
The ORCA-Flash4.0 features 100 frames per second imaging at full resolution. For those experiments that need even more temporal resolution, the ORCA-Flash4.0 delivers even higher speeds with a smaller region of interest.
| Readout Method | Number of Pixels | Readout Speed at center position (frames/s) |
| Full Resolution | 2048 x 2048 | 100 |
| Sub-array readout (Typical examples) | 2048 x 1024 | 200 |
| 2048 x 512 | 400 | |
| 2048 x 256 | 800 | |
| 2048 x 64 | 3200 | |
| 2048 x 8 | 25,600 |
Wide field of view and high resolution
With 4.0 megapixels at 6.5 x 6.5 µm each, the ORCA-Flash4.0 offers a field of view 2.5 times larger than a standard EM-CCD. In addition, this camera's smaller pixels can resolve much finer details than the larger pixels on an EM-CCD camera.
