Re-imaging optical system

Details Re-imaging optical system Re-imaging optical system

1988-04-27

1989-09-19

Arnold, Bruce Y.

350569, 350286, G02B 2302, G02B 504

Patent

active

048675490

ABSTRACT:
A re-imaging optical system for re-imaging a first image formed by an objective lens into a second image of desired size includes, in succession from the object side, a first lens unit which is a field lens constructing the exit pupil of the objective lens and the entrance pupil of the re-imaging optical system so as to be substantially conjugate with each other, a forward sub-unit of a second lens unit, the forward sub-unit having a negative refractive power, an optical member for making the second image formed by the re-imaging optical system erect, and a rearward sub-unit of the second lens unit, the rearward sub-unit having a positive refractive power.

REFERENCES:
patent: 829121 (1906-08-01), Neumayer et al.
patent: 1468762 (1923-09-01), Taylor et al.
patent: 1848788 (1932-03-01), Loeck
patent: 2221609 (1940-11-01), Sanger

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