Head mount type image display unit

Details Head mount type image display unit Head mount type image display unit

1995-10-25

1998-09-01

Epps, Georgia Y.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359633, 359638, 359631, G02B 2714

Patent

active

058018859

ABSTRACT:
The invention provides an optical system which is well corrected in terms of both curvature of field and coma at a field angle of about 120.degree. and a pupil diameter of about 15 mm and may be applied to both image pickup and ocular systems. Dioptric elements 11 are located the pupil plane side E and/or image plane side I of a concentric element 12 including two semitransparent surfaces 121 and 122, said two semitransparent surfaces 121 and 122 being concave on the pupil plane side E and located such that they transmit light at least once and reflect light at least once.

REFERENCES:
patent: Re27356 (1972-05-01), Russa
patent: 3443858 (1969-05-01), Russa
patent: 4653875 (1987-03-01), Hines
patent: 4874214 (1989-10-01), Cheysson et al.
patent: 5459612 (1995-10-01), Ingleton
patent: 5517366 (1996-05-01), Togino
patent: 5552922 (1996-09-01), Magarill

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