Electro-optic binocular indirect ophthalmoscope
First Claim
1. An ophthalmoscope comprising:
- a light source for illuminating the interior of a patient'"'"'s eye with radiation, and imaging devices for electro-optically imaging and displaying images of the interior of the patient'"'"'s eye to an observer, said images being formed from radiation reflected from the interior of the patient'"'"'s eye in response to said illuminating radiation and directed along two different optical paths.
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Abstract
The present invention relates to a binocular indirect ophthalmoscope for observing and examining the fundus of the human eye. The ophthalmoscope of the invention integrates an electro-optic imaging system in the viewing optics of the ophthalmoscope. Advantageously, such integration permits the stereoscopic observation of the retina and choroid by employing radiation ranging from the near ultraviolet to the infrared, including the visible spectrum. A light source illuminates a desired portion of a patient'"'"'s fundus and the radiation reflected in response to the illuminating radiation is brought to focus to produce an aerial image of the fundus. A pair of ophthalmoscope lenses then magnify and image the aerial image along two different optical paths onto imaging sensors, such as charge coupled devices (CCDs) and image cameras, or image tubes such as image intensifiers. Visible displays, such as liquid crystal displays (LCDs), cathode ray tubes (CRTs), or the fluorescent screen of the image tube, then photoelectrically convert the fundus images formed on the imaging sensors and direct corresponding visible images thereof to an observer'"'"'s pupils by means of ocular lenses.
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Citations
78 Claims
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1. An ophthalmoscope comprising:
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a light source for illuminating the interior of a patient'"'"'s eye with radiation, and imaging devices for electro-optically imaging and displaying images of the interior of the patient'"'"'s eye to an observer, said images being formed from radiation reflected from the interior of the patient'"'"'s eye in response to said illuminating radiation and directed along two different optical paths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An improved ophthalmoscope, the improvement comprising:
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a radiation source for illuminating the interior of a patient'"'"'s eye, and imaging devices for electro-optically converting non-visible radiation reflected from the interior of the patient'"'"'s eye in response to said illuminating radiation to a binocular visible display thereof. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A binocular ophthalmoscope comprising
a light source for illuminating the interior of a patient'"'"'s eye with light of a desired spectrum, a viewing assembly for receiving light reflected from the interior of the patient'"'"'s eye in response to said illuminating light and directing along two optical paths a portion of said reflected light, first and second imaging sensors, each of said sensors being placed in a different one of the two optical paths, first and second lenses for focusing said portion of said reflected light onto said first and second imaging sensors, respectively, whereby said first and second imaging sensors produce first and second electrical signals, respectively in response to said focused reflected light, and first and second displays responsive to said first and second electrical signals, respectively, for converting said first and second electrical signals into first and second visible display images of the interior of the patient'"'"'s eye, said visible display images being associated with the images of the interior of the patient'"'"'s eye taken along said two optical paths.
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63. An indirect ophthalmoscope comprising
a light source for illuminating the interior of a patient'"'"'s eye with light, an image intensifier having a fluorescent screen and a photosensitive surface, said fluorescent screen reproducing thereon an image corresponding to that formed on the photosensitive surface by light being focused on said surface, and a lens for focusing on said photosensitive surface an image of an aerial image of the patient'"'"'s eye formed from light being reflected from the interior of the patient'"'"'s eye in response to said illuminating light.
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71. An ophthalmoscope comprising
a light source for illuminating the interior of a patient'"'"'s eye with light, first and second image intensifiers, each having a fluorescent screen and a photosensitive surface, each fluorescent screen reproducing thereon an image focused on the corresponding photosensitive surface, and first and second lenses for focusing on each photosensitive surface of said first and second image intensifiers, respectively an image of the interior of the patient'"'"'s eye formed from light being reflected from the interior of the patient'"'"'s eye in response to said illuminating light, each of said images of the interior of the patient'"'"'s eye taken along two different optical paths.
Specification