Optical instrument and optical element thereof

Details Optical instrument and optical element thereof Optical instrument and optical element thereof

1997-06-02

2000-02-22

Nguyen, Thong

Optical: systems and elements

Diffraction

From zone plate

359362, 359457, G02B 2744, G02B 2160

Patent

active

060287047

ABSTRACT:
An optical instrument is described in which a diffractive element (25) is located at a focal or image plane (3) of the instrument and the diffractive element (25) is effective to produce an array (6) of a plurality of exit pupils at a viewing position for the instrument and thereby to form an enlarged exit pupil for the instrument.

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patent: 4225215 (1980-09-01), Cojan
patent: 4390239 (1983-06-01), Huber
patent: 4695135 (1987-09-01), Blokland et al.
patent: 4878735 (1989-11-01), Vilums
patent: 4927262 (1990-05-01), Schwartz
patent: 5124843 (1992-06-01), Leger et al.
patent: 5446588 (1995-08-01), Missig et al.
patent: 5644323 (1997-07-01), Hilderbrand et al.
patent: 5701132 (1997-12-01), Kollin et al.

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