US5784145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining pupil dimensions
Assignee: St Georges Enterprises Ltd
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Filing: 1993-09-28
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Granted: 1998-07-21
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Expires: 2013-09-28
Abstract
Abstract A binocular apparatus for determining pupil dimensions for the eyes of a subject which include an optical imaging apparatus permitting images defining each pupil to be simultaneously transmitted along separate optical paths to a common optical sensing device. The binocular apparatus is useful in measuring anisocoria and in detecting drug abuse and/or opiate addiction. A method for determining pupil dimensions for the eyes is also presented.
Inventors
- 👤 Abdol Hamid Ghodse
- 👤 Daniel Robert Stafford Taylor
- 👤 Alan John Britten
- 👤 George Henry Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:30
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/11; A61B3/112
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
77 words
Binocular apparatus for determining pupil dimensions for the eyes of a subject, said apparatus comprising optical imaging means whereby in use images defining each respective pupil are simultaneously transmitted along separate optical paths onto separate areas of a common optical sensing means, said apparatus further comprising a divider positioned between said separate optical paths and closely adjacent to said optical sensing means so as to enhance optical separation of said areas and the optical paths leading thereto.
Claim 2
Dependent Claim
77 words
Binocular apparatus for determining pupil dimensions for the eyes of a subject, said apparatus comprising optical imaging means whereby in use images defining each respective pupil are simultaneously transmitted along separate optical paths onto separate areas of a common optical sensing means, said apparatus further comprising a divider positioned between said separate optical paths and closely adjacent to said optical sensing means so as to enhance optical separation of said areas and the optical paths leading thereto.
Claim 3
Dependent Claim
18 words
Apparatus as claimed in claim 1 wherein the optical sensing means comprises a two-dimensional array of charge-coupled devices.
Claim 4
Dependent Claim
33 words
Apparatus as claimed in claim 2 including means for irradiating each eye with infra-red radiation whereby in use infra-red images defining the respective pupils are focused substantially at said array of charge-coupled devices.
Claim 5
Dependent Claim
14 words
Apparatus as claimed in claim 3 wherein said irradiating means comprise infra-red emitting diodes.
Claim 6
Dependent Claim
17 words
The apparatus as claimed in claim 2 wherein the optical sensing means includes a CCD video camera.
Claim 7
Dependent Claim
31 words
The apparatus as claimed in claim 5 further comprising a video tape recorder including a video tape whereby the tape can be processed at a site remote from the recording site.
Claim 8
Dependent Claim
15 words
Apparatus as claimed in claim 1 wherein the optical sensing means comprises a photographic film.
Claim 9
Dependent Claim
23 words
Apparatus as claimed in claim 7 including electronic flashgun means having optical fibers leading therefrom such that in use each eye is irradiated.
Claim 10
Dependent Claim
39 words
Apparatus as claimed in claim 8 including shutter means interrupting the two optical paths and having an operating mechanism linked to switching means for said flashgun means whereby the flashgun means are triggered when said shutter means are opened.
Claim 11
Dependent Claim
31 words
Apparatus as claimed in claim 1 including means for illuminating each eye with a controlled and uniform amount of visible light so as in use to provide an ambient illumination level.
Claim 12
Dependent Claim
27 words
Apparatus as claimed in claim 1 including means whereby the apparatus is adaptable to the interpupillary distances of individual subjects while maintaining a constant optical path length.
Claim 13
Dependent Claim
24 words
Apparatus as claimed in claim 11 wherein said adjusting means comprise periscopic eyepieces mounted so as to be axially moveable about each optical path.
Claim 14
Dependent Claim
22 words
The apparatus as claimed in claim 1 further including a computerized image processing means to afford automatic determination of the pupil dimensions.
Claim 15
Dependent Claim
25 words
Apparatus as claimed in claim 1 wherein said divider comprises a divider plate extending perpendicularly from a position closely adjacent to said optical sensing means.
Claim 16
Independent Claim
35 words
A method for determining pupil dimensions for the eyes of a subject comprising simultaneously projecting and separating images defining each respective pupil along separate optical paths onto separate areas of a common optical sensing means.
Claim 17
Independent Claim
35 words
A method for determining pupil dimensions for the eyes of a subject comprising simultaneously projecting and separating images defining each respective pupil along separate optical paths onto separate areas of a common optical sensing means.
Claim 18
Dependent Claim
29 words
A method as claimed in claim 15 wherein the output from the optical sensing means is subjected to computerized image processing to afford automatic determination of the pupil dimensions.
Claim 19
Dependent Claim
16 words
A method as claimed in claim 16 wherein the computerized image processing includes a circle-fitting algorithm.
Claim 20
Dependent Claim
30 words
A method as claimed in claim 17 wherein the output from the optical sensing means is recorded on video tape for processing at a site remote from the recording site.
Claim 21
Dependent Claim
30 words
A method as claimed in claim 16 wherein the output from the optical sensing means is recorded on video tape for processing at a site remote from the recording site.
Claim 22
Dependent Claim
21 words
A method as claimed in claim 15 wherein the images from the optical sensing means are placed on a photographic film.
Claim 23
Dependent Claim
16 words
A method as claimed in claim 20 wherein the resulting photographic images are subsequently analyzed digitally.
Claim 24
Dependent Claim
13 words
A method as claimed in claim 15 including the detection of drug abuse.
Claim 25
Dependent Claim
13 words
A method as claimed in claim 22 including the detection of opiate addiction.
Claim 26
Dependent Claim
16 words
A method as claimed in claim 23 wherein the opiate addiction includes a Naloxone eye-drop test.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-07-20 | 2002-01-19 | 2002-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-20 | 2006-01-19 | 2006-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-20 | 2010-01-19 | 2010-07-21 | $7700.00 | Window Closed / Lapsed |