CN108420400A - A kind of image guiding fundus camera - Google Patents

Abstract

The present invention is intended to provide a kind of image guiding fundus camera for realizing focusing and human eye positioning by human eye.The present invention includes the nethike embrane object lens set gradually on the same axis（1）, image-forming objective lens（2）And imaging sensor（3）, the fundus camera further includes image composer, and described image generator includes display（41）And spectroscope（42）, the spectroscope（42）It is arranged in the image-forming objective lens（2）With described image sensor（3）Between, the display（41）With the spectroscope（42）It matches, the display（41）The image beam sent out passes through the spectroscope（42）By the image-forming objective lens after reflection（2）With the nethike embrane object lens（1）Eyeground is illuminated, while in the image-forming objective lens（2）Upper formation image, adjusts the display（41）The size and location of image is generated, and then guides direction and its focus of eye-observation.The present invention is applied to the technical field of fundus camera.

Description

An image-guided fundus camera

technical field

The invention relates to a fundus camera, in particular to an image-guided fundus camera.

Background technique

The cornea, iris, lens, etc. in front of the eyeball are defined as the anterior segment by the ophthalmology field, and the vitreous body, retina, choroid, etc. in the back are defined as the posterior segment. The bottom of the posterior segment of the eye is called the fundus. The fundus is composed of the retina, fundus blood vessels, optic nerve head, optic nerve fibers, macula on the retina, and choroid behind the retina. The lesions in these parts are collectively called fundus diseases.

The fundus is the only place where arteries, veins and capillaries can be directly and concentratedly observed with the naked eye. These blood vessels can reflect the dynamics and health status of the blood circulation throughout the body. Therefore, fundus examination is not only an important method to check eye vitreous, retina, choroid and optic nerve diseases, but also a "window" for monitoring many systemic diseases.

At present, there are mainly five kinds of clinically effective fundus examination equipment: ophthalmoscope, slit lamp microscope, fundus camera, scanning laser ophthalmoscope, optical coherence tomography, etc. Each of the five inspection methods has its own characteristics. However, considering the maturity, practicability, ease of operation and production cost of current technology development, fundus cameras will still be the most widely used fundus inspection equipment.

At present, the fundus cameras on the market all use light beams to illuminate the fundus and output the fundus image. This method can only capture fundus images in a single direction, so that doctors cannot fully understand the fundus of the user. Therefore, there is an urgent need to develop a fundus camera with the functions of focusing and positioning by human eyes.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide an image-guided fundus camera that realizes focusing and positioning of the human eye through the human eye.

The technical solution adopted by the present invention is: the present invention comprises the omentum objective lens, the imaging objective lens and the image sensor arranged in sequence on the same axis, the fundus camera also includes an image generator, and the image generator includes a display and a beam splitter, The beam splitter is arranged between the imaging objective lens and the image sensor, the display cooperates with the beam splitter, and the image beam emitted by the display passes through the imaging objective lens and the beam splitter after being reflected by the beam splitter. The retina objective lens illuminates the fundus, and at the same time forms an image on the imaging objective lens, adjusts the size and position of the image generated by the display, and then guides the observation direction and focus of the human eye.

It can be seen from the above scheme that the human eyes will adjust the focus according to what they see, and the display projects the image onto the imaging objective lens, so that the user's eyes focus on the image when using it, and by changing the size and layering of the image , to guide the user's eyes to obtain near and far information, and then adjust the focus of the eyes to achieve the effect of focusing. The human eye will adjust the direction of the eyeball according to what it sees, and the display will send out images at different positions off the axis to guide the user to turn the eyeball according to the position of the image, so as to capture the fundus conditions at different angles and achieve the effect of positioning.

A preferred solution is that the image sensor is a charge-coupled device image sensor.

It can be seen from the above solution that the charge-coupled device image sensor has excellent imaging capability, and the fundus camera can output a clear fundus image by using the charge-coupled device image sensor, which is convenient for doctors to diagnose.

A preferred solution is that the fundus camera further includes a controller, and both the display and the image sensor are electrically connected to the controller.

It can be seen from the above solution that the size and position of the image sent by the display are adjusted through the controller. At the same time, the data output by the image sensor is accepted by the controller.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Detailed ways

As shown in Fig. 1, in the present embodiment, the present invention comprises the omentum objective lens 1, imaging objective lens 2 and image sensor 3 that are arranged in order on the same axis, and described fundus camera also comprises image generator, and described image generator Including a display 41 and a beam splitter 42, the beam splitter 42 is arranged between the imaging objective lens 2 and the image sensor 3, the display 41 cooperates with the beam splitter 42, and the image beam emitted by the display 41 After being reflected by the beam splitter 42, the fundus is illuminated through the imaging objective lens 2 and the retinal objective lens 1, and an image is formed on the imaging objective lens 2 at the same time, and the size and position of the image generated by the display 41 are adjusted to guide The direction in which the human eye looks and its focal point. The image sensor 3 is a charge-coupled device image sensor 3 . The fundus camera further includes a controller 5 , and both the display 41 and the image sensor are electrically connected to the controller 5 .

The positions of the image sensor 3 and the display 41 can be arranged symmetrically, and by setting the image sensor 3 and the display 41 symmetrically, the light beam can reach the fundus and the fundus from the display 41. The light beam reflected from the fundus reaches the image sensor 3 , and the length of the optical path that both need to pass through is the same.

The positions of the image sensor 3 and the display 41 are interchangeable.

The working principle of the fundus camera:

The image light beam emitted by the display 41 is reflected by the beam splitter 42 and passes through the imaging objective lens 2 and the retinal objective lens 1 to illuminate the fundus, and forms an image on the imaging objective lens 2 at the same time, through the controller 5 The size and position of the image generated by the display 41 are adjusted, thereby guiding the observation direction of the human eye and the focus of the eye. The light beam reflected by the fundus retina is imaged by the retina objective lens 1 and projected to the image sensor 3 , and the image sensor 3 outputs the captured fundus image to the controller 5 .

When the positions of the image sensor 3 and the display 41 are exchanged, the path of the light beam is opposite to the original path.

The invention is applied to the technical field of fundus cameras.

Although the embodiments of the present invention are described in terms of actual solutions, they do not constitute a limitation to the meaning of the present invention. For those skilled in the art, it is obvious to those skilled in the art that the modifications to the embodiments and the combination with other solutions are obvious according to the description .

Claims (3)

1. An image-guided fundus camera, characterized in that: it includes a retinal objective lens (1), an imaging objective lens (2) and an image sensor (3) arranged sequentially on the same axis, and the fundus camera also includes an image generating device, the image generator includes a display (41) and a beam splitter (42), the beam splitter (42) is arranged between the imaging objective (2) and the image sensor (3), the display ( 41) Cooperate with the beam splitter (42), the image beam emitted by the display (41) is reflected by the beam splitter (42) and passes through the imaging objective lens (2) and the retinal objective lens (1) The fundus is illuminated, an image is formed on the imaging objective lens (2) at the same time, and the size and position of the image generated by the display (41) are adjusted to guide the observation direction and focus of the human eye. 2. The image-guided fundus camera according to claim 1, characterized in that: the image sensor (3) is a CCD image sensor or a CMOS image sensor. 3. The image-guided fundus camera according to claim 1, characterized in that: the fundus camera further comprises a controller (5), and the display (41) and the image sensor are both connected to the controller The device (5) is electrically connected.