Metadata

Every reader fills the same schema, whatever the vendor. Missing values are simply absent.

Section	Typical fields
instrument	vendor, model, serial
technique	SEM, FIB, TEM, STEM, EELS, ...
beam	voltage_kV, current_nA, emission_current_uA, spot_size
optics	magnification, working_distance_mm, camera_length_mm, horizontal_field_width_um, mode
detector	name, mode
acquisition	datetime, dwell_us, frames_integrated, scan_rotation_deg, operator, software
sample	name, stage_x_mm, stage_y_mm, stage_z_mm, tilt_deg
facility	NUANCE Center, Northwestern University

from nuscope import metadata as md
md.get(ds.metadata, "beam.voltage_kV")
md.summary(ds.metadata)      # short human-readable lines

The vendor's own block is kept, untouched, in ds.original_metadata; NUScope Studio shows it as a searchable tree. Both travel inside every file NUScope saves, and both are covered by the file's seal.