Ultrawide angle zoom objective

Details Ultrawide angle zoom objective Ultrawide angle zoom objective

1982-05-06

1984-10-16

Corbin, John K.

G02B 1304

Patent

active

044771533

ABSTRACT:
Disclosed is a two-component zoom objective having a first lens component of negative power and a second lens component of positive power with the variable air separation between the first and second components effecting zooming. The aforesaid first lens component is constructed with four lenses. The first lens counting from the front is given an aspheric surface, and the air lens defined by the second and third lenses counting from the front and the four lenses in the aforesaid first lens component are appropriately configured to increase the angular field up to an ultrawide angle, while still permitting good correction of aberrations.

REFERENCES:
patent: 4153339 (1979-05-01), Tajima et al.
patent: 4315669 (1982-02-01), Fujii

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