ZEISS GeminiSEM stands for effortless imaging with sub-nanometer resolution. These FE-SEMs (field emission scanning electron microscope) combine excellence in imaging and analytics. Innovations in electron optics and a new chamber design let you benefit from better image quality, usability and flexibility. Take sub-nanometer images below 1 kV without an immersion lens. Discover how Gemini optics has improved and evolved over time.

The combination of magnetic and electrostatic lens (Gemini optic lens) opens access to the world of low kV imaging. Photoresist and ceramic samples can be imaged uncoated without charging effects at high resolution with the DSM 982 Gemini.

The EsB detector is enabling  in-column backscatter detection for the first time. The unique energy filtering properties are used to enhance the material contrast. Even nanocomposites  can be analyzed with good material contrast with a small interaction volume.
Conventional diode detectors were not able to work below 5 kV, but the in-column EsB can provide this.

Cazaux and Grillon are publishing results showing the influence of the working distance for selective contrast imaging with the Gemini objective lens. ​
Sweet spot imaging means systematically varying the SEM accelerating voltage and working distance for optimum image quality.

Correlative microscopy enables relocating regions of interest (ROI) in specimens in an electron microscope, which were previously identified in a light microscope and vice versa. The entire process takes only a few seconds. This opens up totally new dimensions in microscopy e.g., identification of ROIs with light microscopy and subsequent analytics in the SEM.

The upper condenser sets the beam current, the lower condenser accounts for optimum resolution by optimizing the aperture angle, enabling high resolution at all beam currents. For a larger depth of field, the system can be switched to a different imaging mode and the convergence angle will be decreased. 

The Nanotwin objective introduces a new lens design with lower aberration coefficients. It is optimized for ultra high resolution at low kV.

Zeiss ZEN Intellesis produces powerful machine learning segmentation of multidimensional images. It enables image segmentation and object classification without the need to code a single line.

With the Smart Autopilot, part of the new electron optical engine, Gemini 3 is able to ensure the highest possible resolution at each acceleration voltage. 
 

What an anniversary! Scroll further down to explore which microscopes use the technology, to which extend and last but not least, how the technology that we celebrate today works.

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