RONCHIGRAM

Ronchigram

π/4 Phase Limit

e^- Beam Energy = keV ⇒ Wavelength = pm

○ Objective Aperture Semiangle = mrad

Diffraction Limited Resolution = pm

○ π/4 Aperture Semiangle = mrad

Show image overlays

χ(α,Φ) = Σ_n,m[ C_n,m α ⁿ⁺¹cos(m(Φ-Φ_n,m))/(n+1) ]

Aberration

Symbol

(Haider)

Symbol

(Krivanek)

Defocus

C₁

C₁₀: Å

2-Fold Astigmatism

A₁

C₁₂: nm Φ ₁₂: °

Axial Coma

B₂

C₂₁: nm Φ ₂₁: °

3-Fold Astigmatism

A₂

C₂₃: nm Φ ₂₃: °

3rd Order Spherical

C₃

C₃₀: nm

3rd Order Axial Star

S₃

C₃₂: nm Φ ₃₂: °

4-Fold Astigmatism

A₃

C₃₄: nm Φ ₃₄: °

4th Order Axial Coma

B₄

C₄₁: μm Φ ₄₁: °

3-Lobe Aberration

D₄

C₄₃: μm Φ ₄₃: °

5-fold Astigmatism

A₄

C₄₅: μm Φ ₄₅: °

5th Order Spherical

C₅

C₅₀: mm

5th Order Axial Star

S₅

C₅₂: mm Φ ₅₂: °

5th Order Rosette

R₅

C₅₄: mm Φ ₅₄: °

6-fold Astigmatism

A₅

C₅₆: mm Φ ₅₆: °

Chromatic Aberration

C_c

C_c: 0 m

Display Size (pixels)= Display Size (mrad) =

Sample Scale (Factor of Display Size (px))=

Force Javascript instead of WebAssembly (Slow) Map Arrow Keys to Defocus and 2-fold (Dev)