公开(公告)号：US3582775A

公开(公告)日：1971-06-01

申请号：US3582775D

申请日：1969-01-24

Applicant: STANFORD RESEARCH INST

Inventor： CORNSWEET TOM N

IPC: G06G7/18 ,  H04B15/00 ,  G01R23/16

CPC classification number: G06G7/18 ,  H04B15/00

Abstract: A method and apparatus is disclosed for averaging repetitive signals to increase the signal-to-noise ratio comprising a cathode-ray tube on which the signal is displayed as an intensity modulated horizontal line. The face of the cathode-ray tube is focused by a lens onto the photosensitive surface of an image storage tube, thereby causing the image tube to store a charge pattern that is proportional to the total amount of light that has fallen on it during a number (n) of horizontal sweep cycles of the cathode-ray tube. An electron beam inside the image tube scans the charge pattern every n-th cycle of the cathode-ray tube to produce a video signal that is proportional to the sum of all the signal-plus-noise events displayed on the cathode-ray tube since the last scan.

公开(公告)号：US3536383A

公开(公告)日：1970-10-27

申请号：US3536383D

申请日：1967-10-09

Applicant: STANFORD RESEARCH INST

Inventor： CORNSWEET TOM N ,  CRANE HEWITT D

IPC: A61B3/103 ,  A61B3/15 ,  A61B3/10 ,  A61B3/00

CPC classification number: A61B3/103 ,  A61B3/156

公开(公告)号：US3639041A

公开(公告)日：1972-02-01

申请号：US3639041D

申请日：1970-09-21

Applicant: STANFORD RESEARCH INST

Inventor： CORNSWEET TOM N

IPC: A61B3/103 ,  A61B3/10 ,  G01B9/00 ,  G01B11/30

CPC classification number: A61B3/103

Abstract: A system and method for obtaining a depth profile of the fundus of the eye in which first and second alternately excited light sources image an aperture on a portion of the optic disk. The refractive power of the eye is held approximately constant by having the eye look at a fixation point. A detector is provided for sensing the degree of overlap of the aperture images due to the first and second light sources. In one embodiment the aperture is displaced in a Z-direction with respect to the eye until the images of the aperture completely overlap. The aperture is then successively displaced horizontally in an X-direction and/or vertically in a Y-direction with respect to the eye and in each position the aperture is adjusted in the Z-direction until the first and second images of the aperture completely overlap. The positions of the aperture where the first and second images thereof overlap correspond to the depth of the respective portions of the optic fundus from any arbitrary point at the front of the eye.

Abstract translation: 一种用于获得眼睛眼底深度分布的系统和方法，其中第一和第二交替激发的光源对视盘的一部分上的孔进行成像。 通过使眼睛看着固定点，眼睛的屈光力保持近似恒定。 提供检测器，用于感测由于第一和第二光源引起的孔径图像的重叠程度。 在一个实施例中，孔相对于眼睛在Z方向上移位，直到孔的图像完全重叠。 然后，孔径相对于眼睛在X方向和/或Y方向上水平连续移位，并且在每个位置中，孔径在Z方向上被调节，直到孔的第一和第二图像完全重叠 。 其第一和第二图像重叠的孔的位置对应于眼睛前方任何任意点处的眼底的各个部分的深度。

公开(公告)号：US3614214A

公开(公告)日：1971-10-19

申请号：US3614214D

申请日：1970-09-09

Applicant: STANFORD RESEARCH INST

Inventor： CORNSWEET TOM N ,  EILERS GEORGE J ,  CRANE HEWITT D

IPC: A61B3/14 ,  A61B3/15 ,  A61B3/10 ,  G01B9/00

CPC classification number: A61B3/156

Abstract: An optical system and method for photographing an eye fundus in which a fundus camera having a focus control is aligned with the position of an eyelens. An automatic optometer is coupled to the fundus camera and is adapted to sense refractive power of the eye. Means are coupled to the automatic optometer and the fundus camera for controlling the focus of the fundus camera and activating the fundus camera to take a photograph when the focus of the fundus camera matches the instantaneous refractive power of the eye.