Flat wide-angle objective

Details Flat wide-angle objective Flat wide-angle objective

2005-12-27

2005-12-27

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S753000, C359S770000

Reexamination Certificate

active

06980379

ABSTRACT:
A flat wide-angle objective of the invention consists of a first sub-unit that is located on the object side of the objective and includes an assembly of two conventional aspheric negative, plano-concave lenses, and a second sub-unit in the form of a set of four microlens arrays arranged on the image-receiving side of the objective. The microlenses of all microlens arrays have the same arrangement of microlenses in all the arrays. A diaphragm array with restricting openings can be sandwiched between a pair of the microlens arrays. The invention makes it possible to reduce longitudinal dimension of the objective. In operation, the first sub-unit creates an imaginary image of the object in its focal plane, which is located on object side of the objective, while the second sub-unit creates an actual image of the object in the image plane on the image-receiving side of the objective.

REFERENCES:
patent: 4188092 (1980-02-01), Momiyama
patent: 5790324 (1998-08-01), Park
patent: 6084719 (2000-07-01), Saguwara et al.
patent: 6545824 (2003-04-01), Sensui
patent: 6721101 (2004-04-01), Daniell
U.S. Appl. No. 10/862,178, filed Jun. 7, 2004, Igor Gurevich et al.

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