Optical system for image observation

Details Optical system for image observation Optical system for image observation

1998-11-04

2000-10-17

Epps, Georgia

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

631633, 631640, G02B 2714, G02B 2712

Patent

active

061340510

ABSTRACT:
An optical system for an ocular optical system or a projection optical system, in which a plurality of illuminating light sources of different colors can be placed in a side-by-side relation to each other, and which makes it possible to reduce the overall size and weight of an apparatus such as a head-mounted image display apparatus or a color film projection apparatus. The optical system has an image-forming optical system (1) that projects a real image or virtual image of an object placed in an image plane (3). The image-forming optical system (1) has an entrance pupil (5) at a position on the side of the image plane (3) remote from the image-forming optical system. An exit pupil (4) is located in a conjugate relation to the entrance pupil (5) with respect to the image-forming optical system (1). A chromatic aberration producing device (6) is provided between the entrance pupil (5) and the exit pupil (4). Even if a plurality of illuminating light sources of different colors are placed in a side-by-side relation to each other on the entrance pupil (5), rays from the different light sources can pass the exit pupil (4), being superimposed on one another, without chromatic aberration.

REFERENCES:
patent: 5661603 (1997-08-01), Hanano et al.
patent: 5701202 (1997-12-01), Takahashi
patent: 5706136 (1998-01-01), Okuyama et al.
patent: 5742262 (1998-04-01), Tabata et al.
patent: 5768025 (1998-06-01), Togino et al.
patent: 5917662 (1999-06-01), Sekita
patent: 6023373 (2000-02-01), Inguchi et al.

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