Stéréoscope à sphère parallèle

Region: France    Tag: Hermagis
Stéréoscope à sphère parallèle, Hermagis, France
Stéréoscope à sphère parallèle, Hermagis, France
© Virtual Stereoscopic Museum

The Stéréoscope à sphère parallèle is a Brewster-type stereoscope. The patent describes an improved optical design based on parallel spherical lenses and makes four principal claims: reduced image distortion, diminished chromatic aberration (color fringing), increased magnification, and reduced eye strain.

Related items: Brewster-type stereoscope  Hermagis

Specifications:

Classification:
Hand-held / Single-view / Box-type / Brewster-type
Introduction:
1857
Designer:
Hyacinthe Hermagis
Maker:
Hermagis
Construction:
Wood
System:
Closed
Medium:
Opaque and transparant
Format:
8.5 x 17
Lens:
Convex
Lens focus:
Yes
Inter-ocular adjustment:
No

Patents and registrations:

Number: 34862
Instrument d'optique
Filing: 26-12-1857, Applicant(s): Hyacinthe Hermagis. via: archives.inpi.fr

Published: 17-07-2026