Observation optical system

Details Observation optical system Observation optical system

2007-08-28

2007-08-28

Boutsikaris, Leonidas (Department: 2872)

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

C359S013000, C359S015000, C359S631000, C359S638000

Reexamination Certificate

active

11031999

ABSTRACT:
An observation optical system has an entrance surface, a reflecting surface, and an exit surface. At least one of these surfaces is configured as a free-formed surface, to which a volume holographic optical element (HOE) is closely adhered. The observation optical system satisfies the following conditions:in-line-formulae description="In-line Formulae" end="lead"?−0.20<φx/Px<0.30in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?−0.20<φy/Py<0.20in-line-formulae description="In-line Formulae" end="tail"?where φx is the power of only the HOE in an x direction at the point of intersection of an axial principal ray with the surface of the HOE, φy is the power of only the HOE in a y direction (parallel to the direction of decentration) at the point of intersection of the axial principal ray with the surface of the HOE, Px is the power of the whole of the observation optical system in the x direction, and Py is the power of the whole of the observation optical system in the y direction.

REFERENCES:
patent: 6137602 (2000-10-01), Mukawa
patent: 6331916 (2001-12-01), Mukawa
patent: 6801347 (2004-10-01), Nakamura et al.
patent: 6822770 (2004-11-01), Takeyama
patent: 2002/0060850 (2002-05-01), Takeyama
patent: 2004/0233488 (2004-11-01), Kasai et al.

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