Patent US2624858A successfully refreshed from Google Patents.
Patent US3871772A successfully refreshed from Google Patents.
US3871772A
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US
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Eye examining instrument aligning means and method therefor
Assignee: Tropel Inc
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Filing: 1973-04-23
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Granted: 1975-03-18
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Expires: 1993-04-23
Abstract
Abstract An eye viewer uses a source of infra red light directed on the eye, an image intensifier, means for focusing reflected infra red light from the eye on the image intensifier, and means for viewing the image intensifier for observing a visible image of the eye. Such an eye viewer is associated with an eye examining instrument for aligning and positioning the instrument relative to the eye by viewing the centering of the light from the instrument on the eye and the centering of the image of the eye in the field of view of the eye viewer.
Inventors
- 👤 Charles R Munnerlyn
- 👤 Robert C Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:26
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/14; A61B3/15; A61B3/152; G; G01; G01B; G01B11/00; G01B11/26; G01B11/27
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
190 words
An eye viewer for aligning the optical axis of an eye examining instrument with an eye and spacing said instrument a predetermined distance from said eye, said viewer comprising: a. a source of radiant energy; b. means for directing a beam of said radiant energy on said eye along said optical axis; c. means mounted on said instrument off said optical axis for forming a viewable image from said radiant energy; d. means for focusing radiant energy reflected from said eye at an acute angle from said optical axis and onto said image forming means so the field of view of said image forming means intersects said optical axis at said predetermined distance from said eye; e. means for adjusting said instrument transversely of said eye for centering said radiant energy beam on said eye as viewed in said image forming means to align said beam with said eye; and f. means for adjusting said instrument in the direction of said optical axis to center said image of said eye in said field of view of said image forming means for spacing said instrument said predetermined distance from said eye.
Claim 2
Dependent Claim
190 words
An eye viewer for aligning the optical axis of an eye examining instrument with an eye and spacing said instrument a predetermined distance from said eye, said viewer comprising: a. a source of radiant energy; b. means for directing a beam of said radiant energy on said eye along said optical axis; c. means mounted on said instrument off said optical axis for forming a viewable image from said radiant energy; d. means for focusing radiant energy reflected from said eye at an acute angle from said optical axis and onto said image forming means so the field of view of said image forming means intersects said optical axis at said predetermined distance from said eye; e. means for adjusting said instrument transversely of said eye for centering said radiant energy beam on said eye as viewed in said image forming means to align said beam with said eye; and f. means for adjusting said instrument in the direction of said optical axis to center said image of said eye in said field of view of said image forming means for spacing said instrument said predetermined distance from said eye.
Claim 3
Dependent Claim
33 words
The viewer of claim 1 including a mark fixed relative to said image forming means to aid in said centering of said eye in said field of view of said image forming means.
Claim 4
Independent Claim
188 words
A method of aligning and spacing an instrument relative to an eye for objectively measuring the refractive error of said eye by directing a beam of radiant energy along an optical axis onto said eye and monitoring the radiant energy reflected from the retina of said eye back along said optical axis, said aligning and spacing method comprising: a. gathering radiant energy reflected from said eye at an acute angle from said optical axis; b. focusing said gathered reflected radiant energy on an image forming means; c. fixing the field of view of said image forming means to intersect said optical axis of said instrument at a predetermined distance from said instrument; d. viewing the image of said eye formed by said image forming means; e. adjusting said instrument transversely of said eye until said radiant energy beam is centered on said eye as observed on said image forming means; and f. adjusting the spacing of said instrument from said eye by moving said instrument and said image forming means together until said image of said eye is centered in said field viewed by said image forming means.
Claim 5
Independent Claim
188 words
A method of aligning and spacing an instrument relative to an eye for objectively measuring the refractive error of said eye by directing a beam of radiant energy along an optical axis onto said eye and monitoring the radiant energy reflected from the retina of said eye back along said optical axis, said aligning and spacing method comprising: a. gathering radiant energy reflected from said eye at an acute angle from said optical axis; b. focusing said gathered reflected radiant energy on an image forming means; c. fixing the field of view of said image forming means to intersect said optical axis of said instrument at a predetermined distance from said instrument; d. viewing the image of said eye formed by said image forming means; e. adjusting said instrument transversely of said eye until said radiant energy beam is centered on said eye as observed on said image forming means; and f. adjusting the spacing of said instrument from said eye by moving said instrument and said image forming means together until said image of said eye is centered in said field viewed by said image forming means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |