Decentered prism optical system

Details Decentered prism optical system Decentered prism optical system

1998-04-07

2000-08-15

Epps, Georgia

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359633, 359834, G02B 2714

Patent

active

06104539&

ABSTRACT:
A decentered prism optical system suitable for use as an ocular optical system used in combination with an objective optical system and favorably corrected for pupil aberration. A prism optical system (7) which receives an image formed by an objective lens includes a decentered prism (7) having at least three surfaces (3 to 5) decentered with respect to each other, wherein the space between the at least three surfaces (3 to 5) is filled with a transparent medium having a refractive index not smaller than 1.3. The optical path is reflected at least twice in the optical system (7), and the optical paths of light rays do not intersect each other. At least one reflecting surface (4) has a rotationally asymmetric surface configuration having no axis of rotational symmetry in nor out of the surface. The optical system has both the function of optically transmitting a pupil (1) by image formation and the function of optically transmitting an image and is satisfactorily corrected for pupil aberration.

REFERENCES:
patent: 3810221 (1974-05-01), Plummer
patent: 3836931 (1974-09-01), Plummer
patent: 5701202 (1997-12-01), Takahashi
patent: 5706136 (1998-01-01), Okuyama et al.

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