Tilt-shift tomography eye scanning system and method thereof

Abstract

The invention discloses a tilt-shift tomography eye scanning system and a method thereof, relates to the field of optical instruments for the ophthalmology, and aims at solving the problem of eye fixation during focusing. The scanning system comprises a light source (1), a fracture diaphragm (2), a projecting mirror group (3), a color-separating reflective device (4), eye forepart tissues (5), an eye (6), tilt-shaft imaging lenses (7), tilt-shift cameras (8), focusing lenses (9), focusing cameras (10), a fixed support assembly (11), and a rotary disc assembly (12). A focusing sighting mark optical path device (13) is further arranged; can comprise a focusing sighting mark light source (14), a focusing sighting mark projection lens (15) and a color-separating reflective mirror (16); is installed on the fixed support assembly (11); and provides gaze sighting marks for the eye (6) to enable the eye forepart tissues (5) to be basically fixed. The tilt-shift tomography eye scanning system and the method thereof are mainly used for examining eye forepart tissues.

Description

technical field [0001] The invention relates to the field of ophthalmic optical instruments, in particular to an axis-shifting tomographic eye scanning system and a method thereof. Background technique [0002] The current shift tomography eye scanning system generally has the following specific defects: [0003] 1. In the case of out-of-focus visual targets, the subject's line of sight has no definite direction, and the eyeballs are easy to rotate, which affects the inspection results. [0004] 2. In foreign countries, there are also focusing targets, but they are generally realized by marking symbols on the projection optical lens. If the focusing targets provided by this method are too small, it is difficult for the patient’s eyes to find them. If they are too large, the patient’s gaze range may be too large. Not only the staring effect is not very good, but also it is easy to disturb and lose light, affect the illumination, thus affect the shooting effect of the camer...

AI Technical Summary

Problems solved by technology

[0003] 1. In the case of out-of-focus visual targets, the subject's line of sight has no definite direction, and the eyeballs are easy to rotate, which affects the inspection results

[0004] 2. In foreign countries, there are also focusing targets, but they are generally realized by marking symbols on the projection optical lens. If the focusing targets provided by this method are too small, it is difficult for the patient’s eyes to find them. If they are too large, the patient’s gaze range may be too large. Not only the staring effect is not very good, but also it is easy to disturb and lose light, affect the illumination, thus affect the shooting effect of the camera, and then affect the measurement results; in addition, it is not convenient to adjust the position of the focusing target

[0005] 3. As announced on September 15, 2010, the Chinese invention patent with the publication number CN 101828900 A provides "a shift-axis tomography device", which well realizes the function of rotating scanning photography, and its claim 1 clearly describes " The center of rotation of the rotating disk (1-18) coincides with the center of the focusing optical path of the focusing optical path equipment", and its claim 3 clearly states that "there are 2 to 4 red light-emitting diodes on the beam splitting prism (1-6)" , but in the technology of using the red light emitted by the red diode in the center of the optical path to focus, if the patient's eyes use the red diode as the light source for the visual target, the patient's eye axis is facing the entire device, and the red diode is located in the center of the dichroic prism, which will inevitably block The slit projected optical path on the main optical path makes it impossible to image near the middle of the image captured by the rotating camera and the focusing camera, and the whole device cannot well complete the stereoscopic imaging function of the parts near the eye axis; and the red diode is located on the edge of the dichroic prism When using multiple diodes, the eyes will inevitably be unable to stare due to the scattered distribution of the staring targets, so in these cases the entire device cannot complete the staring, focusing and shooting functions that are completely aligned.

[0006] In addition, the method of "focusing optical path equipment set on the rotating disk (1-18)" clearly stated in claim 1 will make the power supply cables of "focusing optical path equipment" such as "red light emitting diodes" follow the rotating disk ( 1-18) rotation, which limits the number of rotations of the rotary disc (1-18), and the cable is frequently pulled and easily damaged. Even if the power supply is rotated through the carbon brush, the carbon brush is prone to failure or damage, and always need frequent replacement

[0007] At present, there is no axis-shift tomographic eye that overcomes the above defects and can not only provide focusing targets, but also has comprehensive focusing effects, better staring effects, higher imaging quality, unlimited number of rotations, and higher equipment reliability. Scanning system and method

Images