Polarization phase difference plate

Details Polarization phase difference plate Polarization phase difference plate

2007-06-12

2007-06-12

Boutsikaris, Leonidas (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S566000, C359S574000, C359S485050, C359S494010

Reexamination Certificate

active

11361639

ABSTRACT:
The object of the present invention is to provide an excellent-quality polarization phase difference plate that enables, by a simple structure: decrease in light loss and in oscillation of the intensity of the transmitting emission light through effectively suppressing Fresnel reflection in the polarization phase difference plate; improvements in the optical property, cut in the cost; and decrease in the manufacture inferior. In the polarization phase difference plate, cross-sectional shape of the convex part is formed in a taper shape from the bottom part thereof towards the top part; a flat part is formed at least between the convex parts being adjacent to each other; and the period of the diffraction grating is formed in a size that is equal to or smaller than the wavelength of light to be used.

REFERENCES:
patent: 6243199 (2001-06-01), Hansen et al.
patent: 2005-044429 (2006-02-01), None

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