Back to results
US 3,942,874 AGranted
Pancratic wide-angle objective
AssigneesKarl Vockenhuber, Raimund Hauser
InventorsWalter Besenmatter, Trude Muszumanski, Gunter Kurz
Life of this patent
Estimating the term…
Abstract
A pancratic wide-angle objective comprises a stationary negative front component in the form of a single meniscus with a convex forward surface, an axially movable intermediate component consisting of a biconvex lens, and a stationary multilens positive rear component separated from the front component by an airspace greater than the focal length of the latter. The individual focal lengths of the front, intermediate and rear components have absolute values in a ratio of approximately 4:5:3.
Claims8
A pancratic wide-angle objective comprising:
- a stationary negative front component;
- a stationary multilens positive rear component;
- and
- an axially movable positive intermediate component between said front and rear components;
- said front component being a meniscus-shaped lens member with a concave surface turned toward said intermediate component and with an absolute focal length greater than that of said rear component;
- said intermediate component being a biconvex lens member with a focal length greater than the absolute focal length of said front component, the absolute focal lengths of said front component, said intermediate component and said rear component having a ratio of approximately 4:5:3.
3 more elements
Dependencies are inferred from the claim text.