Optical: systems and elements – Diffraction – From grating
Patent
1998-02-26
2000-01-04
Spyrou, Cassandra
Optical: systems and elements
Diffraction
From grating
359566, 359 15, 359570, 359 1, 283 86, 362806, G02B 518, G02B 532, B42D 1500
Patent
active
060116501
ABSTRACT:
A decorative optical display (20) utilizing a reflective diffraction grating (94) or a transmissive diffraction grating (304) and a plurality of polychromatic light sources (60) disposed around perimeter (106) of the reflective diffraction grating or perimeter (314) of the transmissive diffraction grating. The light sources are disposed so as to the illuminate the reflective or transmissive diffraction grating at an oblique angle (204) or (328), respectively. The oblique illumination of the reflective or transmissive diffraction grating prevents a viewer (200) from seeing undiffracted light rays (212) or (336) emanating from the light sources, which can detract from the appeal of the optical display pattern (250). The reflective or transmissive diffraction grating may be flat or curved and may be supported by a support member (90). Further, the reflective or transmissive diffraction grating may have either a single or multiple axes. A shade (114) is provided to cover the light sources to prevent undiffracted light rays from reaching the viewer, or to hide wires (76) connecting the light sources. Also, the activation of the light sources is controlled via a control unit (152), and can be set to any one of a number of different temporal and spatial activation modes. The optical display is also adaptable for a variety of uses calling for an attractive display, such as a clock (500) or a display sign (600).
REFERENCES:
patent: 734133 (1903-07-01), Porter
patent: 3610918 (1971-10-01), Barlow
patent: 3790772 (1974-02-01), Newman et al.
patent: 3914761 (1975-10-01), Murase et al.
patent: 3949350 (1976-04-01), Smith
patent: 4259709 (1981-03-01), Eddings
patent: 4716506 (1987-12-01), Shang
patent: 4795223 (1989-01-01), Moss
patent: 4799764 (1989-01-01), Crowell
patent: 4834475 (1989-05-01), Robinson
patent: 4892369 (1990-01-01), Moss
patent: 4916593 (1990-04-01), Moss et al.
patent: 4972305 (1990-11-01), Blackburn
patent: 5032003 (1991-07-01), Antes
patent: 5058992 (1991-10-01), Takahashi
patent: 5101193 (1992-03-01), Smith et al.
patent: 5184848 (1993-02-01), Itoh et al.
patent: 5186533 (1993-02-01), Hori
patent: 5247491 (1993-09-01), Kwiatkowski
patent: 5276599 (1994-01-01), Neeley
patent: 5303129 (1994-04-01), Hori
patent: 5617248 (1997-04-01), Takahashi et al.
patent: 5708519 (1998-01-01), Yamamoto et al.
Parker William P.
Stephens Peter H.
Chang Audrey
Rainbow Design LLC
Spyrou Cassandra
LandOfFree
Decorative optical display apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Decorative optical display apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decorative optical display apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1077182