Douglas L Robinson

US Patent:

D477901, Jul 29, 2003

Filed:

Jun 11, 2002

Appl. No.:

29/162148

Inventors:

Douglas Robinson - Farmington NY

Assignee:

Gorbel, Inc. - Fishers NY

International Classification:

1205

US Classification:

D34 33

US Patent:

6598976, Jul 29, 2003

Filed:

Sep 5, 2001

Appl. No.:

09/946183

Inventors:

Kenneth S. Westort - Ithaca NY
Douglas L. Robinson - Ithaca NY

Assignee:

Optical Products Development Corp. - Elmira NY

International Classification:

G03B 2126

US Classification:

353 28, 353 20, 359630

Abstract:

A real image projection system comprises a single curved mirror having two different optical surfaces of revolution, one on the convex surface and one on the concave surface. In one embodiment, the convex surface is a conical curve of spherical or parabolic surface of revolution, coated with a reflective optical coating. The concave surface is much like that of a Mangin mirror, but it has an aspheric surface of revolution, optimized to reduce spherical aberrations over a larger area offset from the optical axis. The system optionally employs a single aspheric surface of revolution on the concave surface for reduction of aberrations, although the Mangin mirror approach, using an aspheric concave surface of revolution, is the preferred embodiment.

US Patent:

6609958, Aug 26, 2003

Filed:

Dec 21, 2000

Appl. No.:

09/746852

Inventors:

Douglas P. Robinson - Farmington NY
Alvah B. Aldrich - Rochester NY

Assignee:

Bausch Lomb Incorporated - Rochester NY

International Classification:

B24B 900

US Classification:

451 59, 451173, 451 43

Abstract:

Apparatus and method for edging an ophthalmic lens comprises a spindle on which a lens is removably positioned and set rotating to engage with a web of abrasive material which is secured at only one end thereof. The free end of the web is allowed to dangle and is also preferably set into an oscillating, vertical movement which edges both the anterior and posterior surfaces of the lens adjacent the lens periphery to thereby smooth the periphery of the lens.

US Patent:

6612701, Sep 2, 2003

Filed:

Aug 20, 2001

Appl. No.:

09/933331

Inventors:

Kenneth S. Westort - Ithaca NY
Douglas L. Robinson - Ithaca NY
Randolph J. Turner - Ithaca NY

Assignee:

Optical Products Development Corporation - Elmira NY

International Classification:

G03B 2114

US Classification:

353 10, 353 78, 359479, 359629

Abstract:

A real image projection system comprising two or more optical surfaces of revolution, with at least one comprising an aspheric surface of revolution. The aspheric surface of revolution is of a design to reduce natural aberrations inherent in imaging using surface of revolutions of the conic family of curves. In one embodiment, a real image projection system includes a pair of curved reflector segments of the conical family of curves, wherein at least one of the reflector segments has an aspherical surface of revolution, the primary segment being of longer focal length relative to the secondary segment, and an object positioned substantially at the focal point of the longer focal length reflector segment, such that a real image is positioned substantially at the focal point of the shorter focal length reflector segment, and the real image is projected along a viewing axis extending from the object positioned at the focal point of the primary reflector segment to the surface of the primary reflector segment, to the surface of the secondary reflector segment, to the focal point of the secondary reflector segment, to a viewer.

US Patent:

6650470, Nov 18, 2003

Filed:

May 16, 2002

Appl. No.:

10/147632

Inventors:

Randolph J. Turner - Ithaca NY
Douglas L. Robinson - Ithaca NY
Kenneth S. Westort - Ithaca NY

Assignee:

Optical Products Development Corp. - Ithaca NY

International Classification:

G03B 2156

US Classification:

359443, 359460

Abstract:

A photo-screen device for a real image projection system includes a transparent or semi-transparent material having a fixed or static image applied to the surface thereof, wherein the photo-screen is positioned so as to intersect a real image beampath of the real image projection device. In an alternative embodiment, a method for producing a photo-screen device for a real image projection system includes the steps of printing colors thereon in reverse order and positioning the photo-screen such that the non-printed side faces a viewer of the real image.

US Patent:

6733140, May 11, 2004

Filed:

Apr 19, 2002

Appl. No.:

10/126167

Inventors:

Kenneth S. Westort - Ithaca NY
Douglas L. Robinson - Ithaca NY
Randolph J. Turner - Ithaca NY

Assignee:

Optical Products Development Corp. - Elmira NY

International Classification:

G03B 2128

US Classification:

353 98, 353 7, 353 10, 353122, 353 28, 353 77, 353 78, 353 99, 359479, 359478, 359631

Abstract:

A real image projection system includes at least one curved reflector, positioned in a tilted configuration, wherein an optical axis of the reflector is not coincident with a viewing axis, and a beampath between a target source and the curved reflector neither passes through nor reflects off of a beamsplitter.

US Patent:

6798579, Sep 28, 2004

Filed:

Jan 24, 2003

Appl. No.:

10/350762

Inventors:

Douglas L. Robinson - Ithaca NY
Kenneth S. Westort - Ithaca NY

Assignee:

Optical Products Development Corp. - Elmira NY

International Classification:

G02B 2714

US Classification:

359631, 359630, 359649

Abstract:

A real image display system includes a primary image source for projecting a primary image from the start of a primary light path to an end of the primary light path at which the primary image is viewable, two reflectors positioned in the primary light path between the primary image source and the projected real image, a circular polarizer for circularly polarizing a light beam positioned in the primary light path between the mirror and real image, whereby outside light entering the system is substantially blocked before exiting the system, thereby substantially eliminating ghost image formation caused by outside light sources.

US Patent:

6935747, Aug 30, 2005

Filed:

Mar 13, 2003

Appl. No.:

10/388062

Inventors:

Kenneth S. Westort - Ithaca NY, US
Douglas L. Robinson - Ithaca NY, US

Assignee:

Optical Products Development - Elmira NY

International Classification:

G03B021/26
G03B021/00
G03B021/28
G02B027/22
G02B027/14

US Classification:

353 28, 353 78, 353 10, 359479, 359631

Abstract:

An improved real image projection system comprises, in the primary configuration, a tilted mirror to eliminate ghost reflections, and a unique arrangement allowing the introduction of a second background image without a 50%/50% beamsplitter, while providing system transmission of approximately 50%. A secondary configuration incorporates an elliptical or aspheric curved mirror designed to simulate the surface of a spherical curve when light strikes the elliptical surface at an angle equal to the elliptical angle of the curved mirror. In a third configuration, a single curved mirror has two different optical surfaces of revolution, one on the convex surface and one on the concave surface. The concave surface is much like that of a Mangin lens, but it has an aspheric surface of revolution, optimized to reduce spherical aberrations over a larger area offset from the optical axis.