US3634003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for imaging scheiner apertures in an optometer
Assignee: Individual
•
Filing: 1970-01-02
•
Granted: 1972-01-11
•
Expires: 1990-01-02
Abstract
Abstract In an optometer of the type employing Scheiner apertures, an optical system is disclosed for projecting those apertures into a plane proximate to the eye, most commonly the plane of the pupil. According to the arrangement of the system, the plane of projection of the apertures and the plane of refraction, that is, the vertex distance of refraction, are separable.
Inventors
- 👤 David Guyton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:09
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/103
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
In an optometer for determining the refractive correction for the eye in combination: a. an optometer lens; b. a target located on the posterior side of said lens to provide determination of said refractive correction at the anterior focal plane of said lens; c. Scheiner apertures located on the posterior side of said optometer lens; and d. an optical system which, in combination with said optometer lens, images said apertures in a second plane approximate to the eye, said second plane distinct from said interior focal plane.
Claim 2
Dependent Claim
87 words
In an optometer for determining the refractive correction for the eye in combination: a. an optometer lens; b. a target located on the posterior side of said lens to provide determination of said refractive correction at the anterior focal plane of said lens; c. Scheiner apertures located on the posterior side of said optometer lens; and d. an optical system which, in combination with said optometer lens, images said apertures in a second plane approximate to the eye, said second plane distinct from said interior focal plane.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 including first adjustable positioning means for varying the position of the eye on the optical axis of said optometer lens.
Claim 4
Dependent Claim
17 words
The apparatus of claim 2 including second adjustable positioning means for varying the position of said plane.
Claim 5
Dependent Claim
23 words
The apparatus of claim 3 wherein said second adjustable means comprises means for adjusting the position of said apertures along said optical axis.
Claim 6
Dependent Claim
36 words
The apparatus of claim 4 wherein said optical system comprises a converging lens, and said converging lens and said optometer lens are positioned to form a telescopic system for imaging said apertures in said second plane.
Claim 7
Dependent Claim
18 words
The apparatus of claim 4 including linking means for simultaneously operating said first and second adjustable positioning means.
Claim 8
Dependent Claim
18 words
The apparatus of claim 5 including linking means for simultaneously operating said first and second adjustable positioning means.
References Cited (Backward Citations)
US1235170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |