Optical system, display optical system and image-taking...

Details Optical system, display optical system and image-taking... Optical system, display optical system and image-taking...

2007-05-01

2007-05-01

Dunn, Drew A. (Department: 2872)

Optical: systems and elements

Mirror

Plural mirrors or reflecting surfaces

C359S850000, C359S572000, C359S574000

Reexamination Certificate

active

10767490

ABSTRACT:
An optical system is disclosed with which higher magnification can be easily achieved and aberrations can be favorably corrected, yet is compact. The optical system includes a plurality of optical surfaces including a first surface which has at least a reflective action, a second surface reflecting the light rays reflected by the first surface back toward the first surface, and a diffractive optical surface. The first surface reflects a central field-angle principal ray, which comes from the second surface and is again incident on the first surface, to the opposite side of the previous reflection with respect to a normal at a hit point of the central field-angle principal ray on the first surface.

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