G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 27/02 (2006.01) G02B 5/18 (2006.01) G02B 27/42 (2006.01) G02B 27/44 (2006.01)
Patent
CA 2275819
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. The diffractive element is formed to provide a plurality greater than two of optical diffractive gratings each being disposed angularly relative to others of the plurality of optical diffractive gratings. (Figure 3)
L'invention concerne un instrument optique sur lequel un élément à diffraction (25) est placé sur le plan focal ou le plan image (3) de l'instrument, et l'élément à diffraction (25) est suffisamment efficace pour produire une série (6) d'ensembles de pupilles de sortie à une position de visionnement pour l'instrument, et par conséquent, former une pupille de sortie agrandie pour l'instrument. L'élément à diffraction est formé de façon à donner un ensemble plus grand que si deux mires périodiques à diffraction étaient chacune disposées à un angle par rapport aux autres mires périodiques à diffraction optique de l'ensemble. (Figure 3)
Fetherstonhaugh & Co.
Freeman Robin John
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