| 摘要 |
A slit lamp mounted eye imaging a slit lamp integrated, a handheld, OCT integrated, or attached to a separate chinrest-joystick assembly apparatus for producing a wide field and/or magnified views of the posterior or the anterior segments of an eye through an undilated or dilated pupil. The apparatus images sections and focal planes and utilizes an illumination system that uses one or more LEDs, shifting optical elements, flipping masks, and/or aperture stops where the light can be delivered into the optical system on optical axis or off axis from center of optical system and return imaging path from the eye, creating artifacts in different locations on the eye image. Image processing is employed to detect and eliminate artifacts and masks from images. The apparatus can be used in combination with an OCT, microscope and can be disposed in a hand-held housing for hand-held use. |
| 主权项 |
1. An apparatus that produces an image of a posterior or an anterior segment of an eye, comprising:
a light source; an optical system with a center having optical elements that is shifted to deliver light from said light source on an optical axis or slightly off said optical axis from said center of optical system and return an imaging path from said posterior and anterior segments; a means for sequentially turning said light source on and off in synchronization with image capture under each condition; a means for inserting a flipping mask that momentarily blocks unwanted reflections in small areas of an image while leaving the majority areas of the image illuminated; a means for detecting said artifacts in one image without said flipping mask, and detecting said flipping artifact mask in second image, and combining images to create a composite image that is artifact-free; a means for tilting or swinging the optical head, changing patient fixation to generate views with artifacts in different locations on each image or movie stream, and a plurality of shifting optical elements, masks and light sources where two or more images having specular and other reflection artifacts located in two or more anatomically different areas of each sequentially acquired image of said eye segments are created, said artifacts in said images are detected by image processing, said images are combined with one or more other images to create a composite image, a stereo image, a panoramic image from multiple images or video stream, or generating a video stream panning the retina without artifacts, where relatively clear well-focused image sections are combined from one or more said other images or video streams to create said composite image or movie, wherein said alternate illuminating and imaging paths enter said pupil at an angle in comparison to said optical center axis but are shifted by optical elements to create artifacts in different locations, wherein said position of light sources and said imaging paths are of variable size, position and shape depending upon pupil size and is manually or automatically adjusted dynamically in combination with apertures and masks based on said pupil size and desired field of view. |
