This is description of this part:
Paraboloidal darkfield condenser for the vintage Stativo Euskop microscope manufactured by the Italian company Officine Galileo.
Basic parameters:
Mounting method: below the microscope stage in the circular condenser holder
Mounting diameter: 37 mm
Condenser type: paraboloidal condenser
Iris diaphragm: yes (this is an uncommon feature in darkfield condensers)
Oil immersion: yes, the condenser was designed for cedarwood oil
Numerical aperture N.A.: not specified (however, since this is an oil-immersion condenser, its N.A. is greater than 1.0)
Additional information: the light refraction was calculated for a microscope slide glass thickness of 1.35 mm
Manufacturer's original name: condensatore per campo oscuro
The photographs in the gallery show that one retaining pin securing one iris diaphragm leaf is no longer in its original position. In order to preserve the historical condition of this vintage condenser, this detail has intentionally not been repaired. This minor defect does not affect the operation of the iris diaphragm, which can be clearly seen in the accompanying video.
The website "Museo di Storia della Psichiatria" (https://bbcc.regione.emilia-romagna.it), dedicated to the cultural heritage of the Italian region of Emilia-Romagna, provides a downloadable PDF museum record describing an identical condenser preserved in the museum's collection (https://bbcc.regione.emilia-romagna.it/samira/api/print/card/173420).
What is this part needed for?
- if you own an Officine Galileo Stativo Euskop microscope and would like to obtain an original darkfield condenser for it
- if you collect historic microscope optics
- if you simply want to use this condenser, as it is a fully functional example with a mounting diameter of 37 mm
