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US4307944A Expired / Lapsed US ⏱️ 0.0 years remaining

Microscope

Assignee: Individual
•
Filing: 1979-10-01
•
Granted: 1981-12-29
•
Expires: 1999-10-01
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Abstract

Abstract A microscope which is suitable for slit-lamp microscopy of the fundus without contact lens, stereo-chronoscopy, and laser photo-coagulation in the fundus and the anterior segment of the eye, is provided having two telescopic sections, the first section having an objective lens capable of projecting by rectangular projection the three-dimensional image of the fundus of an eye in the microscope. A reticle is provided a predetermined distance from the objective lens within the microscope such that when the microscope is properly aligned with the eye, the reticle will be in the plane of the image of pupil projection in the image of the eye. The second telescopic section has a field lens and viewing apparatus and a reticle means spaced from the field lens such that it will be at the focal point of the field lens. Slit-lamp means are provided on the second tubular section such that it will project a slit-lamp beam focused at the focal point of the field lens. A laser beam projection apparatus can also be attached to the second tubular section such that its wide beam will be projected and focused at the focal point on the aerial image of the field lens.

Inventors

  • 👤 Kurt E. Schirmer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 18:28
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/13; A61F; A61F9/00; A61F9/007; A61F9/008; A61F9/00821; A61F2009/00861; A61F2009/00863; A61F2009/00874

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 128 words
A microscope comprising a first telescopic section and a second telescopic section, the first section mounting a fixed objective lens and a first reticle means at a predetermined distance from the objective lens for coincidence with the image of the pupil of an eye to be observed, the second tubular telescopic section mounting the viewing apparatus including a field lens, a second reticle means fixed in the second section relative to the field lens such that the second reticle means is at a focal point of the field lens and the second tubular section can be adjusted relative to the first section to focus on an object target within the eye while the first reticle means is coincident with the pupillary plane of the image of the eye.
Claim 2
Dependent Claim 128 words
A microscope comprising a first telescopic section and a second telescopic section, the first section mounting a fixed objective lens and a first reticle means at a predetermined distance from the objective lens for coincidence with the image of the pupil of an eye to be observed, the second tubular telescopic section mounting the viewing apparatus including a field lens, a second reticle means fixed in the second section relative to the field lens such that the second reticle means is at a focal point of the field lens and the second tubular section can be adjusted relative to the first section to focus on an object target within the eye while the first reticle means is coincident with the pupillary plane of the image of the eye.
Claim 3
Dependent Claim 42 words
A microscope as defined in claim 1, wherein at least one slit-lamp is mounted to the second section and the slit-lamp beam is projected such that it focuses at the focal point of the field lens coincident with the second reticle means.
Claim 4
Dependent Claim 49 words
A microscope as defined in claim 2, wherein there is at least one slit-lamp located on the side of the second telescopic section with both the slit-lamp beams being projected towards the objective lens and being focused at the focal point of the aerial image of the field lens.
Claim 5
Dependent Claim 88 words
A microscope as defined in claim 1, wherein the first reticle means acts as a reference whereby the first reticle means is aligned with the pupillary plane in the projected image of the eye and adjustment of the second telescopic section such that the second reticle in the focal point of the field lens is aligned at an object target within the image of the fundus of the eye, whereby proper stereotaxis measurements can be made in the light of rectangular projection of the image of the eye.
Claim 6
Dependent Claim 71 words
A microscope as defined in claim 2, wherein a laser beam with wide aperture providing a wide beam is projected within the second telescopic section and focused at the focal point of the field lens such that when the second telescopic section is adjusted so that the focus is on an object target within the fundus of the eye, the laser beam will converge at a spot at that focal point.
Claim 7
Dependent Claim 28 words
A microscope as defined in claim 5, wherein the slit-lamps provide boundary limits to the cone of the laser beam within the microscope as projected within the eye.

References Cited (Backward Citations)

US1475698A Cited
US3591262A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-12-28 1985-06-29 1985-12-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-12-28 1989-06-29 1989-12-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-12-28 1993-06-29 1993-12-29 $7700.00 Window Closed / Lapsed

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