Distortion corrected image display apparatus

Details Distortion corrected image display apparatus Distortion corrected image display apparatus

1997-03-19

1999-06-01

Epps, Georgia

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359633, G02B 2714

Patent

active

059093170

ABSTRACT:
An image display apparatus corrected for distortions, particularly, a distortion which is asymmetric with respect to the center of the image field. The apparatus includes an image display device (8), and an ocular optical system (42) having a rotationally asymmetric optical surface or a decentered optical surface having a power. The apparatus satisfies the condition of .vertline.tan .THETA..sub.1 -tan .THETA..sub.2 .vertline./tan .THETA..sub.1 <0.1, where .THETA..sub.1 is an angle made between a light ray emitted from an arbitrary point (44) on the image display device (8) and passing through the center of an exit pupil (40) and a visual axis (41), that is, a straight line connecting the center of an observer's pupil and the center of a projected image of the image display device (8), and .THETA..sub.2 is an angle made between the visual axis (41) and a light ray emitted from a point (45) which is in point symmetry with the arbitrary point (44) about the center (43) of the image display surface of the image display device (8) and passing through the center of the exit pupil (40).

REFERENCES:
patent: 5093567 (1992-03-01), Staveley
patent: 5459612 (1995-10-01), Ingleton
patent: 5633833 (1997-05-01), Nanba et al.
patent: 5687025 (1997-11-01), Nanba
patent: 5699194 (1997-12-01), Takahashi
patent: 5714967 (1998-02-01), Okamura et al.

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