Double condenser
A double-condenser consists of two separate condenser - lenses . They are installed individually or together as an optical component, double condenser, in a lighting system.
A condenser - whether it consists of two or just one lens - has only one partial function in an illumination system, namely to make the illumination of the object to be imaged ( slide , photo negative, etc.) even and intense. Nevertheless, condenser is often used as a synonym for lighting system.
The combination of two condenser lenses in a common tube can be found primarily in the lighting system of a magnifying device . Here both parts are usually the same plano-convex spherical lenses .
In slide projectors , the convex surface of the first lens is mostly aspherical .
Individual evidence
- ↑ Heinz Haferkorn: Optics - physical-technical basics and applications , Barth, 1994, ISBN 3-335-00363-2 , p. 618
- ↑ Heinz Haferkorn: Optics - physical-technical basics and applications , Barth, 1994, ISBN 3-335-00363-2 , p. 620
- ↑ Dietrich Kühlke: Optics - Basics and Applications , Harri Deutsch, Frankfurt / Main, 2011, ISBN 978-3-8171-1878-6 , p. 160