Optical: systems and elements – Single channel simultaneously to or from plural channels – By surface composed of lenticular elements
Reexamination Certificate
2005-03-22
2005-03-22
Mack, Ricky (Department: 2873)
Optical: systems and elements
Single channel simultaneously to or from plural channels
By surface composed of lenticular elements
C359S619000
Reexamination Certificate
active
06870681
ABSTRACT:
There is disclosed a partially transparent, directional viewing sheet formed of plastic material with convex and concave lenses of elliptical cross-section, preferably lenticular lenses, formed respectively on the front and back surfaces of the sheet, there being intervening spaces with convex surfaces between the concave lenses which spaces are not transparent to images and may be imprinted with an image that is viewable through the sheet from some directions. Preferably the concave lens focal length is typically about one-half of the focal length of the convex lens. Elliptical cross-section of the lenses minimizes spherical aberration and sharpens the focus. The thickness of the sheet causes focal points of the lenses to substantially coincide producing the effect of a tiny Galilean telescope. The view through such a sheet in a direction substantially aligned with the optical axis of the tiny telescope is a minimally distorted view of objects distant from or near to the opposite side of the sheet while off-axis viewing will present the image imprinted on the intervening convex surfaces between the concave lenses on the back surface of the sheet. Such convex surfaces are preferred over flat surfaces for high speed printing in offset printing presses.
REFERENCES:
patent: 1943995 (1934-01-01), Weld
patent: 2815310 (1957-12-01), Anderson
patent: 2991693 (1961-07-01), MacNeille
patent: 3002051 (1961-09-01), Tait
patent: 3012477 (1961-12-01), Lodge
patent: 3119195 (1964-01-01), Braunhut
patent: 3250173 (1966-05-01), Henry
patent: 3255665 (1966-06-01), Weiher et al.
patent: 3365350 (1968-01-01), Cahn
patent: 3468545 (1969-09-01), Anderson
patent: 3565733 (1971-02-01), Leach
patent: 3653138 (1972-04-01), Cooper
patent: 4021945 (1977-05-01), Sussman
patent: 4034555 (1977-07-01), Rosenthal
patent: 4069809 (1978-01-01), Strand
patent: 4208086 (1980-06-01), Perry
patent: 4279244 (1981-07-01), McAlister
patent: 4305383 (1981-12-01), Bloxsom
patent: 4307710 (1981-12-01), Natter
patent: 4327708 (1982-05-01), Taylor
patent: 4461278 (1984-07-01), Mori
patent: 4509823 (1985-04-01), Moriguchi
patent: 4541727 (1985-09-01), Rosenthal
patent: 4557253 (1985-12-01), Talbert et al.
patent: 4634220 (1987-01-01), Hockert et al.
patent: 4766684 (1988-08-01), Wah Lo
patent: 4867514 (1989-09-01), Waldron
patent: 4924356 (1990-05-01), French
patent: 4935335 (1990-06-01), Fotland
patent: 4993790 (1991-02-01), Vick
patent: 5191472 (1993-03-01), Kurematsu
patent: 5216543 (1993-06-01), Calhoun
patent: 5270859 (1993-12-01), Wirth et al.
patent: 5276478 (1994-01-01), Morton
patent: 5461495 (1995-10-01), Steenblik
patent: 5494445 (1996-02-01), Sekiguchi
patent: 5543965 (1996-08-01), Bielinski
patent: 5611611 (1997-03-01), Ogino et al.
patent: 5642226 (1997-06-01), Rosenthal
patent: 5644431 (1997-07-01), Magee
patent: 5870225 (1999-02-01), Ogino et al.
patent: 5933276 (1999-08-01), Magee
patent: 6157491 (2000-12-01), Watanabe et al.
patent: 6169633 (2001-01-01), Watanabe
patent: 6721101 (2004-04-01), Daniell
patent: 6724536 (2004-04-01), Magee
patent: 6741395 (2004-05-01), Johnson
patent: 20030002160 (2003-01-01), Johnson et al.
patent: 20040070836 (2004-04-01), Rosenthal
patent: 20040095649 (2004-05-01), Johnson
patent: 569237 (1958-07-01), None
patent: WO0179916 (2001-10-01), None
Keegan Robert R.
Keisling Pieper & Scott PLC
Mack Ricky
University of Arkansas N.A.
LandOfFree
Directional image transmission sheet and method of making same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Directional image transmission sheet and method of making same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Directional image transmission sheet and method of making same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3419758