Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1986-09-05
1989-01-31
Corbin, John K.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
350255, A61B 310
Patent
active
048011983
ABSTRACT:
An attachment for a slit lamp that permits the operator to view the superimposition of an image of a patient's eye and a second image that may comprise a fluorescein angiogram or other photographic image of the patient's eye, or an image formed by a CRT or other display system. The slit lamp includes an objective for forming the first image directed along a first optical path, an eyepiece, being attachable to the objective such that the eyepiece is positioned along the first optical path. The attachment includes a body, a beamsplitter, and an image forming system. The body includes an attachment for attaching the body between the objective and viewing means, and also includes a passage through which the first image can pass along the first optical path to the eyepiece. The beamsplitter is mounted in the body, and positioned in the first optical path. The image forming system projects the second image onto the beamsplitter, such that a portion of the second image is reflected along the first optical path. The image forming system may include a zoom lens system for adjusting the size of the second image. The zoom lens system may comprise a pair of lenses and positioning means including an inner tube having a pair of helical slots and a pair of outer tubes having a pair of longitudinal slots. A beamsplitter positioning device is also provided for permitting the operator to precisely position the first and second images with respect to one another.
REFERENCES:
patent: 1516145 (1924-11-01), Bosshardt
patent: 1922537 (1933-08-01), Fouquet
patent: 4370033 (1983-01-01), Kani et al.
patent: 4597649 (1986-07-01), Swaniger et al.
M. W. Gaynon, M.D., "Integrated Projection of Fundus Photographs During Macular Photocoagulation", Arch Ophthalmol, vol. 102, Mar. 1984, pp. 464-465.
B. Jean, M.D. et al., "Simultaneous Fluo-Angioscope for Laser Coagulation in the Macular Area", University Eye Clinic Tubingen, Dept. of Diseases of the Post. Segment, 1 page, with attached photograph.
Erickson Phillip J.
Heacock Gregory L.
Corbin John K.
Ocular Instruments, Inc.
Ryan Jay P.
LandOfFree
Slit lamp attachment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Slit lamp attachment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slit lamp attachment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-175411