Holographic image corrector

Details Holographic image corrector Holographic image corrector

2006-05-02

2008-12-30

Chang, Audrey Y (Department: 2872)

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

C359S015000

Reexamination Certificate

active

07471430

ABSTRACT:
The invention provides a holographic image corrector in a microscope, which employs an optical system that has as an objective a lens or mirror. The characteristics of the objective are recorded by sending a first laser beam through a spatial filter (or an array of pinholes) and then through the objective, if a lens or reflecting the beam therefrom, if a mirror, to form an objective beam. Means are provided for directing a laser reference beam also through a spatial filter (or an array of pinholes) and intersecting same with the object beam in a recording medium, to form a hologram thereof. Then means illuminate the article to be viewed with a laser beam so that light therefrom passes through the objective or reflects therefrom and through the hologram, to correct for aberrations in the objective and provide a relatively clear image of the article.

REFERENCES:
patent: 3598466 (1971-08-01), Friedl
patent: 3749469 (1973-07-01), Gayeski
patent: 4478481 (1984-10-01), Fusek et al.
patent: 4902100 (1990-02-01), Reynolds et al.

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