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Luca vs Interline CCD

Luca vs Interline CCD

Product catalog summary

Introduction
This technical note compares Andor's Luca-R EMCCD camera with a well-established interline CCD for cell microscopy applications. The Luca-R EMCCD offers a unique combination of ultra-sensitivity, resolution, and flexibility, particularly in low-light conditions where interline CCDs may not perform optimally.

Camera Specifications

Luca R EMCCD: 1 Megapixel EMCCD frame transfer sensor, 8x8 µm pixel size, <1 e- read noise with EM gain, 12.5 frames/sec, -20°C cooling, USB 2.0 interface.
Interline CCD: 1.3 Megapixel sensor, 6.45x6.45 µm pixel size, 5.5 e- read noise, 11 frames/sec, -30°C cooling, Firewire interface.

Performance Comparison

Low Light Conditions: Luca-R EMCCD outperforms interline CCD, offering better signal contrast and resolution due to its EM gain feature.
Bright Signal Conditions: Interline CCD provides better image quality due to smaller pixel size.
Moderate Intensity: Luca-R EMCCD achieves better spatial resolution through enhanced contrast.

Test Conditions
The cameras were tested using an inverted microscope with confocal illumination and a 488nm laser. Various light conditions were simulated to assess performance in terms of signal-to-noise ratio and spatial resolution.

Results
Under low light, Luca-R significantly outperformed the interline CCD in signal-to-noise and resolution. In brighter conditions, the interline CCD delivered sharper images due to smaller pixels. However, in intermediate conditions, Luca-R still showed superior resolution.

Implications for Live Cell Imaging
Luca-R's flexibility in both bright and low light conditions makes it a better choice for live cell imaging, where low light conditions are often encountered.

Conclusions
Luca-R EMCCD is superior in low light conditions and offers flexibility that interline CCDs lack. It is the preferred choice for live cell work due to its sensitivity and adaptability.

Appendix: Choosing Between Luca-R and iXon+ 885 EMCCDs
Factors to consider include speed, cooling, size, interface, UV responsivity, and budget. iXon+ 885 offers faster frame rates and better cooling, while Luca-R is more compact and cost-effective.

Catalog excerpts

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Results Under restricted signal conditions, derived through use of low laser power and/or short exposures, the Luca R significantly out-performed the interline CCD sensor, both in terms of Signal-to-Noise and resolution (because the latter is highly influenced by the former) as shown in Figure 1. Application of EM Gain of the Luca-R serves to amplify the weak signal above the read noise floor, thus drastically improving contrast and definition of fine structural features inside the imaged cell. The lower sensitivity of the interline CCD camera is due primarily to the influence of the read noise...

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Luca vs Interline CCD

Luca vs Interline CCD

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