Eyepiece design

Details Eyepiece design Eyepiece design

1993-11-29

1998-10-20

Sugarman, Scott J.

Optical: systems and elements

Lens

Eyepiece

359727, 359728, G02B 1700, G02B 2500

Patent

active

058255532

ABSTRACT:
An improved eyepiece for an optical system. In general, the inventive eyepiece (10) includes a refractive element (16) and an optical arrangement for relaying the entrance pupil of the system to the refractive element. In a specific implementation, the optical arrangement includes a concave primary mirror (12) and a secondary mirror (14). The mirrors are mounted to communicate an image from the refractive element (16) to the entrance pupil (40). In the specific implementation, the refractive element (16) is one or more refractive lenses. The use of a reflective optical arrangement allows for the long eye relief. The placement of the entrance pupil close to the pupil of the lens allows for the use of a compact optical arrangement with high ratio of eye relief to effective focal length with a compact optical arrangement. The system affords minimal lateral chromatic aberration and good image quality.

REFERENCES:
patent: 2423676 (1947-07-01), Altman
patent: 4934801 (1990-06-01), Mercado
patent: 5004331 (1991-04-01), Haseltine et al.
patent: 5034763 (1991-07-01), Ihabata
patent: 5073016 (1991-12-01), Burke
patent: 5317451 (1994-05-01), Hasushita

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