Objective lens system with five elements

Details Objective lens system with five elements Objective lens system with five elements

1975-04-17

1976-11-30

Sacher, Paul A.

350176, G02B 934

Patent

active

039945766

ABSTRACT:
An objective of the expanded Tessar type, having five elements constituting four components (two of the elements being cemented to each other to form one component), all of the components being air spaced from each other. The front two components (in the direction from the object or long conjugate side toward the image or short conjugate side) are both positive. Numerical limits or ranges are given, for certain designated features of the lens system. If a lens of this type is so designed that the designated features fall within the specified ranges, improved results are attained.

REFERENCES:
patent: 3390936 (1968-07-01), Price

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