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US3582191A Expired / Lapsed US ⏱️ 0.0 years remaining

Three-dimensional indirect ophthalmoscope

Assignee: Individual
•
Filing: 1969-05-14
•
Granted: 1971-06-01
•
Expires: 1989-05-14
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Abstract

Abstract This invention relates to the combination of two economically simplified systems adjustably supported together for coarse and fine adjustments on a headband worn by an examiner, such as a physician wherein the first system is an optical light concentrator system including a head-mounted housing with an adjustable light source and aligned condenser lens means longitudinally adjustable therein, said system including a light reflector exterior of the housing below said condenser lens means, which exterior reflector may be angularly adjustable by the examiner by remote control means to suitably reflect the condensed light rays of the light source to an objective spot on the target area of a subject to be examined, such as the retina of the eye of the subject, and the second system of the combination consists of an observing optical system for the examiner including binoculars with a pair of occular means adjustable to suitable optical position for the examiner''s vision to cooperate with an arrangement of reflector members in the binocular housing, whereby the retinal area of the eye or the like of the subject being observed is made luminously visible to the examiner with the binoculars of the observing optical system and wherein said light reflector of the optical light concentrator system may be remotely adjustable by the examiner as the subject is observed to provide for directional positioning of the light spot while the combined systems are supported together on the examiner''s head.

Inventors

  • 👤 David N Cohen
  • 👤 Brent W Lambert

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 04:18
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/13; A61B3/132; A61B3/0008; A61F; A61F9/00; A61F2009/0035; A61F2009/0043

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 112 words
In an indirect ophthalmoscope of the type that includes an optical system comprising a support means, a light source, a mirror, said light Source mounted on said support means, said mirror attached to a flexible means mounted on said support means and positioned to receive and reflect light emanating from said light source, the combination thereof with remote control thrust means operatively adjacent to said flexible means and mounted on said support means in a manner to provide for selective adjustment of said mirror by action of said thrust means on said flexible means to vary the angle of reflection of light emanating from said light source and reflected by said mirror.
Claim 2
Dependent Claim 112 words
In an indirect ophthalmoscope of the type that includes an optical system comprising a support means, a light source, a mirror, said light Source mounted on said support means, said mirror attached to a flexible means mounted on said support means and positioned to receive and reflect light emanating from said light source, the combination thereof with remote control thrust means operatively adjacent to said flexible means and mounted on said support means in a manner to provide for selective adjustment of said mirror by action of said thrust means on said flexible means to vary the angle of reflection of light emanating from said light source and reflected by said mirror.
Claim 3
Dependent Claim 106 words
In an indirect ophthalmoscope of the type that includes an optical system as described in claim 1, a thrust means that includes a tubular thrust guide, thrust pins, a thrust spring and a manually adjustable thrust means initiator, said thrust pins located at either end of said tubular thrust guide and separated by said thrust spring, said manually adjustable thrust means initiator mounted adjacent one of such pins so that, by manual adjustment, that initiator means urges one thrust pin against said thrust spring that in turn is urged against the other thrust pin that in turn urges against the flexible means attached to said mirror.
Claim 4
Dependent Claim 33 words
In an indirect ophthalmoscope of the type that includes an optical system as described in claim 2, a thrust spring that is made of a material having a relatively low coefficient of friction.
Claim 5
Dependent Claim 25 words
In an indirect ophthalmoscope of the type that includes an optical system as described in claim 2, a tubular thrust guide whose axis is curved.
Claim 6
Dependent Claim 35 words
In an indirect ophthalmoscope of the type that includes an optical system as described in claim 1, a flexible means mounted on said support means and attached to said mirror that comprises a spring means.
Claim 7
Dependent Claim 35 words
In an indirect ophthalmoscope of the type that includes an optical system as described in claim 2, a flexible means mounted on said support means and attached to said mirror that comprises a spring means.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-05-31 1974-11-30 1975-06-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-05-31 1978-11-30 1979-06-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-05-31 1982-11-30 1983-06-01 $7700.00 Window Closed / Lapsed

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