QPt provides a digital solution to phase contrast electron microscopy. QPt derives a phase image only from three ordinary bright-field images based on the Transport of Intensity Equation (TIE), and estimate a just-focus (in-focus) image by eliminating artifacts in defocused images. QPt employs Quantitative Phase Imaging (QPI) technology based on Fast Fourier Transform (FFT).
QPt will work for medium resolution electron microscopy, such as observation of microscopic magnetic field or unstained biological sample, as well as atomic resolution electron microscopy (see HREM module below). The combination of the observed amplitude and the estimated phase completely defines the transmitted complex wave field. Therefore, we can propagate the complex wave to any desired plane, in particular the sample exit plane.
HREM module (the license for HREM module is required) Read More
References and Technical Notes (* Basic Readings)
- * Phase measurement of atomic resolution image using transport of intensity equation (J Electron Microscopy 2005) (OUP site)
- * Phase Measurement in Electron Microscopy Using the Transport of Intensity Equation (Microscopy Today 2005 May) (PDF)
- Real-space observation of a two-dimensional skyrmion crystal (Nature 465 (2010) pp.901-904) (Nature site)
- Real-Space Observation of Helical Spin Order (Science 311 (2006) pp.359-361) (Science site)
- An Approach toward Phase Electron Microscopy (IMC16, Sapporo) (PDF)
- Exit Wave Reconstruction in High-Resolution Electron Microscopy using the Transport of Intensity Equation (Coherence2005) (PDF)
- Transport of Intensity Equation applied to Atomic Resolution Images (EMC2004)
- Defocus Step of Through-Focus Images used to Phase Measurement in the Transport of Intensity Equation (APEM2004)
Examples (Sample Data)
Download
You have to purchase a license (hardware key) to run this program.
Please send your price enquiry to support@hremresearch.com.
- QPt (QPt Basic) v4.0.2
for GMS 3.6 (64bit)*
for GMS 3.5 (64bit)*
for GMS 3.4 (64bit)*
for GMS 3.3 (64bit)*
for GMS 3.2 (64bit)* (applicable from GMS 3.0)
for GMS 2.3 64bit
for GMS 2.1 64bit (applicable from GMS 2.0)
Required plug-ins.
User Key Driver
Previous versions
- QPt (QPt Basic) v3.5.1
for GMS 3.5 (64bit)*
for GMS 3.4 (64bit)*
for GMS 3.3 (64bit)*
for GMS 3.2 (64bit)* (applicable from GMS 3.0)
for GMS 2.3 32bit GMS 2.3 64bit
for GMS 2.1 32bit GMS 2.1 64bit (applicable from GMS 2.0)
- QPt Pro v3.1
for GMS 2.3 32bit
for GMS 2.1 32bit
for GMS 1.x (32bit)
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