Ann E Elsner

US Patent:

6640124, Oct 28, 2003

Filed:

Jul 31, 2001

Appl. No.:

09/919498

Inventors:

Ann E. Elsner - Reading MA
Stephen A. Burns - Reading MA
Andreas W. Dreher - Escondido CA
Robert H. Webb - Lincoln MA

Assignee:

The Schepens Eye Research Institute - Boston MA

International Classification:

A61B 505

US Classification:

600407, 600473, 600476, 356342, 351221

Abstract:

An apparatus and a method are disclosed for separating light remitted by a target into a directly scattered light component and at least one multiply scattered light component, detecting the components at least substantially simultaneously, and forming independent sets of image information from each component. The apparatus and the method can be employed in conjunction with techniques such as scanning and tomography to attain precise imaging of biological tissue, including the retina of the eye.

US Patent:

7331669, Feb 19, 2008

Filed:

Oct 16, 2002

Appl. No.:

10/493044

Inventors:

Ann E. Elsner - Reading MA, US

Assignee:

Indiana University Research and Technology Corporation - Bloomington IN

International Classification:

A61B 3/14

US Classification:

351206

Abstract:

A portable, lightweight digital imaging device uses a slit scanning arrangement to obtain an image of the eye, in particular the retina. The scanning arrangement reduces the amount of target area illuminated at a time, thereby reducing the amount of unwanted light scatter and providing a higher contrast image. A detection arrangement receives the light remitted from the retinal plane and produces an image. The device is operable under battery power and ambient light conditions, such as outdoor or room lighting. The device is noncontact and does not require that the pupil of the eye be dilated with drops. The device can be used by personnel who do not have specialized training in the eye, such as emergency personnel, pediatricians, or general practitioners. Images can be viewed in the device or transmitted to a remote location. The device can also be used to provide images of the anterior segment of the eye or other small structures.

US Patent:

7831106, Nov 9, 2010

Filed:

May 30, 2007

Appl. No.:

12/302531

Inventors:

Ann E. Elsner - Bloomington IN, US
Benno Petrig - Bloomington IN, US

Assignee:

Indiana University Research and Technology Corporation - Indianapolis IN

International Classification:

G06K 9/40

US Classification:

382254, 382274, 382275, 382282

Abstract:

A portable, lightweight digital imaging device uses a slit scanning arrangement to obtain an image of the eye, in particular the retina. The scanning arrangement reduces the amount of target area illuminated at a time, thereby reducing the amount of unwanted light scatter and providing a higher contrast image. A detection arrangement receives the light remitted from the retinal plane and produces an image. The device is operable under battery power and ambient light conditions, such as outdoor or room lighting. The device is noncontact and does not require that the pupil of the eye be dilated with drops. The device can be used by personnel who do not have specialized training in the eye, such as emergency personnel, pediatricians, general practitioners, or volunteer or otherwise unskilled screening personnel. Images can be viewed in the device or transmitted to a remote location. The device can also be used to provide images of the anterior segment of the eye, or other small structures.

US Patent:

8488895, Jul 16, 2013

Filed:

Dec 21, 2009

Appl. No.:

12/643491

Inventors:

Matthew S. Muller - Bloomington IN, US
Ann E. Elsner - Bloomington IN, US
Benno L. Petrig - Bloomington IN, US

Assignee:

Indiana University Research and Technology Corp. - Indianapolis IN

International Classification:

G06K 9/40

US Classification:

382254, 382117, 382128, 382274, 351206, 359 19

Abstract:

A portable, lightweight digital imaging device uses a slit scanning arrangement to obtain an image of the eye, in particular the retina. In at least one embodiment, a digital retinal imaging device includes an illumination source operable to produce a source beam, wherein the source beam defines an illumination pathway, a scanning mechanism operable to cause a scanning motion of the illumination pathway in one dimension with respect to a target, an optical element situated within the illumination pathway, the optical element operable to focus the illumination pathway into an illumination slit at a plane conjugate to the target, wherein the illumination slit is slit shaped, a first two dimensional detector array operable to detect illumination returning from the target and acquire one or more data sets from the detected illumination, wherein the returning illumination defines a detection pathway, and a shaping mechanism positioned within the illumination pathway, wherein the shaping mechanism shapes the source beam into at least one arc at a plane conjugate to the pupil. In at least one exemplary embodiment, the digital retinal imaging device is operable to minimize at least one aberration from the optical element or an unwanted reflection from the target or a reflection from a device.

US Patent:

6236877, May 22, 2001

Filed:

Jan 30, 1998

Appl. No.:

9/016112

Inventors:

Ann E. Elsner - Reading MA
Robert H. Webb - Lincoln MA
Andreas W. Dreher - Escondido CA

Assignee:

The Schepens Eye Research Institute - Boston MA
Laser Diagnostics Technologies, Inc. - San Diego CA

International Classification:

A61B 505

US Classification:

600407

Abstract:

An apparatus for separating an image of a target into a directly scattered component and a multiply scattered component by providing a stationary field stop having a first region and associated detector confocal to a point on the target. During a first interval, a light source directs a first beam to the target and the directly scattered component is selected by the first region. During a second interval, the light source directs a second beam to the target and the multiply scattered component us selected by the first region and its associated detector. Alternatively, a light source directs a first beam to the target and the directly scattered component is selected by the first region of the field stop and its associated detector, while the second region and its associated detector select for multiply scattered light.