The microscopy parameters are those describing the image and the acquisition optical conditions. The important ones to fully describe the Image Formation are:
Global acquisition geometry parameters
Per channel parameters
- Microscope Type
- Numerical Aperture
- Lens Refractive Index
- Medium Refractive Index
- Channel Label
- Excitation Wavelength
- Emission Wavelength
- Back Projected Pinhole Radius (for Confocal-based systems)
- Back Projected Pinhole Distance (for Spinning disc)
- Excitation Photons (for Multiphoton systems)
Since version 3.5, these parameters are also available (they will improve the calculation of a Theoretical PSF):
Starting from version 4.2, STED deconvolution is possible with the STED option, which activates the following additional parameters:
- STED depletion mode: Pulsed-STED, CW gated detection, and CW non-gated detection
- STED saturation factor
- STED wavelength
- STED immunity fraction
Since version 15.05, a specific Light Sheet deconvolution option is available, which asks you for more SPIM/Light sheet specific parameters.
- The active parameters rely on the specified Light Sheet excitation mode
- SPIM Light Sheet Optical option
Since version 18.10, the Array Detector deconvolution option is available, which activates the following parameters:
- Detector model: Zeiss Airyscan/FastAiryscan, Airyscan2, Airyscan2 Rings, NanoSPAD, Generic
- Detector spacing (default: 1.0)
- Aspect ratio (x:y)
- Rotation (degrees)
- Mirroring (none or X)
These algorithms also consider the Acquisition Depth for correction of spherical aberration issues.
For properly Doing Deconvolution the image must be correctly described by these parameters. They are specially necessary for calculating a theoretical Point Spread Function.
If values are displayed in a red background , they are highly suspicious (for example because a given Refractive Index is incompatible with that Numerical Aperture, or because the image is undersampled). An orange background indicates a non-optimal situation.
OverSampling is also indicated with a cyan background, that becomes violet when it is very severe.
These parameters should not be tuned while Doing Deconvolution, they should simply describe the real acquisition conditions. If you get warning messages about UnderSampling, for example, nothing will be gained by changing these parameters to avoid them. By doing so you can produce even worse restoration results. In the Huygens Software, the deconvolution tuning parameters are the Restoration Parameters.
Microscopy parameters can be saved in Parameter Templates for later reuse.
If you are following the Huygens Essential wizard please see the step: Check Microscopic Parameters.
A typical example of microscopic parameters for a Two Channel image, with channels named Ch0 and Ch1:
x-y Sample Size (nm): 50
z Sample Size (nm): 150
Microscope Type: Confocal Microscope
Numerical Aperture: 1.0
Pinhole Radius (nm): 250 (Ch0) 275 (Ch1)
Lens Refractive Index: 1.515 (Oil)
Medium Refractive Index: 1.45
Excitation Wavelength (nm): 488 (Ch0) 543 (Ch1)
Emission Wavelength (nm): 519 (Ch0) 562 (Ch1)
Excitation Photons: 1