Français
3. Instruments for close-up objects
3.1 Basic instrument: the viewfinder
The purpose of an optical finder is to observe objects located at a short distance from the instrument. In figure 13 , A is the point of the object field located on the optical axis of the viewfinder. The image, given by the Ob converging objective, lies at A′, behind the F′ image focus. The position on the axis and the magnifications are easily calculated using the conjugation relations (3) ,
The Ultimate Scientific and Technical Reference
This article is included in
Mechanical and dimensional measurements
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Instruments for close-up objects
Image recorders
References
Manufacturers. Distributors
French manufacturers
Angénieux (lenses).
Bertin & Cie (various instruments).
Bodson SA (endoscopes).
Cerco (objectives).
Fichou (components).
Strong (endoscopes).
Instruments SA, Jobin-Yvon division (components, various instruments).
...
The Ultimate Scientific and Technical Reference
