LVEM 25 Specifications

OPERATION

Specimen size standard ф 3.05mm grids
Time for sample exchange approx 3 min

IMAGING MODES

TEM

Nominal accelerating voltage 25 kV
Resolving power 1.0 nm
Total magnification* 1,127–430,743×
Field of view 100–0.25 µm
The smallest illuminated area 100 nm
Focal length 1.34 mm
Cs (spherical aberration coefficient) 1.03 mm
Cc (chromatic aberration coefficient) 1.05 mm
αtheor (theoretical aperture angle) 1.2×10-2 rad
* nominal (image 3¼×4")
   

ELECTRON DIFFRACTION

Minimum probe size 500 nm  
Camera length (binning 2×2) 2,000–7,000 pxl
Camera constant (binning 2×2) 15.51–54.28 pxl×nm
   

STEM 15

Nominal accelerating voltage 15 kV
Resolving power 1.3 nm
Maximum magnification 375,000×
Maximum field of view 80×80 μm
Focal length 0.95 mm
Cs (spherical aberration coefficient) 0.80 mm
Cc (chromatic aberration coefficient) 0.85 mm
αtheor (theoretical aperture angle) 1.4×10-2 rad
   

STEM 10

Nominal accelerating voltage 10 kV
Resolving power 1.0 nm
Maximum magnification 470,000×
Maximum field of view 105×105 μm
Focal length 0.75 mm
Cs (spherical aberration coefficient) 0.64 mm
Cc (chromatic aberration coefficient) 0.72 mm
αtheor (theoretical aperture angle) 1.6×10-2 rad
   

LIGHT OPTICS

Objective Olympus M 40x NA* 0.95
Objective Olympus M 20x NA* 0.75
Objective Olympus M 4x NA* 0.13
*numerical aperture  
   
   

ELECTRON OPTICS

CONDENSER LENS magnetostatic
  electrostatic
Condenser aperture Ф 50, 50, 30 μm
OBJECTIVE LENS magnetostatic
Objective aperture Ф 50, 50, 30 μm
PROJECTION LENS electrostatic
  double lens
ELECTRON GUN SE Cathode ZrO/W[100]
Current density 0.3 mAsr-1
Lifetime >2,000 hours
   

TEM IMAGE CAPTURE

Camera Scientific CMOS
Sensor Size 2560x2106 pixels
Digitalization 12 bit and 16 bit
Pixel Size 6.5 × 6.5 μm
Read Noise 1.2e-
   

SCAN IMAGE CAPTURE

Monitor (512×512, 1024×1024,
  2048×2048)
Saving image up to 2048×2048 pixels
Digitalization 8 bits
   

VACUUM

AIRLOCK SYSTEM  
Diaphragm and turbomolecular pump 10-5 mbar
OBJECT SPACE  
Ion getter pump 10-8 mbar
ELECTRON GUN  
Ion getter pump 10-9 mbar
   

CONSUMPTION

Control electronics in standby 25 VA
Control electronics 350 VA
Including airlock pumping system 550 VA
Camera 24 VA
PC and monitor 500 VA
No cooling water for the microscope is required  
   

WEIGHTS AND DIMMENSIONS

ELECTRON AND LIGHT OPTICS  
Weight 80 kg
Dimensions 106×63×61 cm
CONTROL ELECTRONICS  
Weight 80 kg
Dimensions 110×63×67 cm
LVEM25 Product Tour Image

The LVEM25 is the newest and most powerful benchtop Low Voltage Electron Microscope built on an enhanced technology platform and designed to work with conventionally prepared materials.