System and method for ocular tomography using plenoptic imaging
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-003/14
A61B-003/00
A61B-003/10
출원번호
US-0829317
(2013-03-14)
등록번호
US-9060710
(2015-06-23)
발명자
/ 주소
Copland, Richard J.
출원인 / 주소
Copland, Richard J.
인용정보
피인용 횟수 :
1인용 특허 :
13
초록▼
Improved systems and methods for ocular tomography are provided. These systems and methods can be used to improve the effectiveness of a wide variety of different ophthalmic diagnostic procedures, and various surgical and non-surgical treatments. One embodiment provides a system and method for deter
Improved systems and methods for ocular tomography are provided. These systems and methods can be used to improve the effectiveness of a wide variety of different ophthalmic diagnostic procedures, and various surgical and non-surgical treatments. One embodiment provides a system and method for determining ocular tomography data for the eye using a plenoptic detector. For example, an ocular tomography system can comprise a set of light sources configured to illuminate an eye, a plenoptic detector configured to receive images of the light sources reflected from surfaces of the eye and generate plenoptic image data representing the images, and a processing system coupled to the plenoptic detector. The processing system is configured to analyze the plenoptic image data to determine tomography data for the eye.
대표청구항▼
1. An ocular tomography system, the ocular tomography system comprising: a set of light sources configured to illuminate an eye which includes a cornea and a lens;a plenoptic detector configured to receive images of the light sources reflected from surfaces of the cornea and lens of the eye and to g
1. An ocular tomography system, the ocular tomography system comprising: a set of light sources configured to illuminate an eye which includes a cornea and a lens;a plenoptic detector configured to receive images of the light sources reflected from surfaces of the cornea and lens of the eye and to generate plenoptic image data representing the images;a processing system coupled to the plenoptic detector, wherein the processing system is configured to analyze the plenoptic image data to determine tomography data for the eye by computationally focusing at least two different Purkinje images included the plenoptic image data, by determining corresponding depths of the two different computationally focused Purkinje images in the plenoptic image data, and by calculating from the depths of the two different computationally focused Purkinje images a distance between two surfaces of the eye selected from an outer surface of the cornea, an inner surface of the cornea, an anterior surface of the lens, and a posterior surface of the lens. 2. The system of claim 1 wherein the plenoptic detector comprises: a photosensor array, the photosensor array comprising a plurality of photosensors; anda microlens array, the microlens array comprising a plurality of lenslets configured to direct the images to the photosensor array, the microlens array arranged a predetermined distance from the photosensor array. 3. The system of claim 2 wherein the photosensor array comprises a two dimensional array of photosensors, and wherein the microlens array comprises a two dimensional array of lenslets. 4. The system of claim 2 wherein the photosensor array is arranged in an image plane. 5. The system of claim 2 wherein each lenslet in the microlens array receives light from the eye at different angles and spatially separates the light at different angles at the photosensor array. 6. The system of claim 3 wherein each lenslet in the microlens array is configured to split a light beam received by it into different rays, wherein each of the different rays is directed to a different photosensor of the photosensor array such that a multipixel microimage is formed under each lenslet in the microlens array. 7. The system of claim 6 wherein the processing system is configured to computationally focus each of the at least two different Purkinje images by selecting outputs of photosensors from each of the microimages and combining the selected photosensor outputs. 8. The system of claim 1 wherein the set of light sources is configured to generate a Purkinje I image from light reflected from an outer surface of a cornea in the eye, generate a Purkinje II image from light reflected from an inner surface of the cornea in the eye, generate a Purkinje III image from light reflected from an anterior surface of a lens in the eye, and generate a Purkinje IV image from light reflected from a posterior surface of the lens in the eye; and wherein the processing system is configured to analyze the plenoptic image data to determine tomography data for the eye by calculating a distance between the Purkinje I image and the Purkinje II image, calculating a distance between the Purkinje II image and the Purkinje III image, and calculating a distance between the Purkinje III image and the Purkinje IV image. 9. An ocular tomography system, the ocular tomography system comprising: a set of light sources configured to illuminate an eye to generate images from the surfaces of the eye, the images including a Purkinje I image from light reflected from an outer surface of a cornea in the eye, a Purkinje II image from light reflected from an inner surface of the cornea in the eye, a Purkinje III image from light reflected from an anterior surface of a lens in the eye, and a Purkinje IV image from light reflected from a posterior surface of the lens in the eye;a plenoptic detector, the plenoptic detector including: a photosensor array, the photosensor array comprising a plurality of photosensors; anda microlens array, the microlens array comprising a plurality of lenslets configured to receive images of the light sources reflected from surfaces of the eye and direct the images to the photosensor array, the microlens array arranged a predetermined distance from the photosensor array, wherein the photosensor array is configured to generate plenoptic image data representing the images;a processing system coupled to the plenoptic detector, the processing system configured to: receive the plenoptic image data;computationally focus the plenoptic image data at the Purkinje I image, the Purkinje II image, the Purkinje III image, and the Purkinje IV image; anduse focus parameters which computationally focus the plenoptic image data at the Purkinje I image, the Purkinje II image, the Purkinje III image, and the Purkinje IV image to calculate distances between the outer surface of the cornea in the eye, the inner surface of the cornea in the eye, the anterior surface of a lens in the eye, and the posterior surface of the lens in the eye. 10. A method for determining ocular tomography, the method comprising: illuminating an eye using a set of light sources;receiving images of the light sources reflected from surfaces of the eye at a plenoptic detector configured and generating plenoptic image data representing the images; andanalyzing the plenoptic image data to determine tomography data for the eye by: computationally focusing at least two different Purkinje images included the plenoptic image data,determining corresponding depths of the two different computationally focused Purkinje images in the plenoptic image data, andcalculating from the depths of the two different computationally focused Purkinje images a distance between two surfaces of the eye selected from an outer surface of the cornea, an inner surface of the cornea, an anterior surface of the lens, and a posterior surface of the lens. 11. The method of claim 10 wherein the plenoptic detector comprises: a photosensor array, the photosensor array comprising a plurality of photosensors; anda microlens array, the microlens array comprising a plurality of lenslets configured to direct the images to the photosensor array, the microlens array arranged a predetermined distance from the photosensor array. 12. The method of claim 11 wherein the photosensor array comprises a two dimensional array of photosensors, and wherein the microlens array comprises a two dimensional array of lenslets. 13. The method of claim 11 wherein each lenslet in the microlens array receives light from the eye at different angles and spatially separates the light at different angles at the photosensor array. 14. The method of claim 11 wherein each lenslet in the microlens array splits a light beam received by it into different rays, and directs each of the different rays to a different photosensor of the photosensor array such that a multipixel microimage is formed under each lenslet in the microlens array. 15. The method of claim 10 wherein computationally focusing each of the at least two different Purkinje images comprises: selecting outputs of photosensors from each of the microimages, andcombining the selected photosensor outputs. 16. The method of claim 10 wherein the set of light sources is configured to generate a Purkinje I image from light reflected from an outer surface of a cornea in the eye, generate a Purkinje II image from light reflected from an inner surface of the cornea in the eye, generate a Purkinje III image from light reflected from an anterior surface of a lens in the eye, and generate a Purkinje IV image from light reflected from a posterior surface of the lens in the eye; and wherein the analyzing the plenoptic image data to determine tomography data for the eye comprises calculating a distance between the Purkinje I image and the Purkinje II image, calculating a distance between the Purkinje II image and the Purkinje III image, and calculating a distance between the Purkinje III image and the Purkinje IV image.
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이 특허에 인용된 특허 (13)
L\Esperance ; Jr. Francis A. (Englewood NJ), Apparatus for performing ophthalmogolical surgery.
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