Self-Shooting Fundus Camera with Visual Guidance Display
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Solution Overview
Problem
Conventional fundus cameras, both desktop and handheld, face challenges in achieving precise shooting of the fundus due to bulkiness and limited portability, and difficulty in illuminating small pupils, making it inconvenient for self-shooting, especially with poor image quality.
Innovation Solution
A fundus camera design that includes a first lens group, illumination element, second lens group, image sensor, light splitter, display panel, processor, and communication interface, guiding the user to adjust the camera's position relative to the eyeball through displayed information, enabling self-shooting with improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a desk-top fundus camera is used to achieve precise shooting position, then the shooting precision is improved, but the portability deteriorates
Solution Approach 1:
The fundus camera is divided into multiple functional modules: a handheld camera body for portability, a separate display device for guidance information, and optional external illumination devices. This segmentation allows the main camera to remain compact while distributing other functions to external components, resolving the contradiction between precision and portability.
Solution Approach 2:
A display device acts as an intermediary between the handheld camera and the user, providing guidance information that enables users to achieve precise shooting positions without requiring complex automated positioning systems in the handheld camera itself. This mediator transfers the positioning function from mechanical automation to visual guidance.
2Manufacturing precision
If the illumination light is aligned precisely to the pupil to improve image quality, then the image quality is improved, but the operation complexity increases
Solution Approach 1:
The display device provides real-time feedback to users through guidance information, showing whether the illumination light is properly aligned with the pupil. This feedback mechanism allows users to self-correct their alignment without requiring complex automated alignment systems, thereby maintaining ease of operation while achieving precise illumination alignment.
Solution Approach 2:
Users are empowered to perform their own fundus photography by following the guidance information displayed. The system enables self-service operation where users independently align the illumination and capture images without requiring professional operators, thus maintaining operational simplicity while achieving precise alignment through user feedback.
3Volume of moving object
If the handheld fundus camera is made compact to improve portability, then the portability is improved, but the shooting precision deteriorates
Solution Approach 1:
The solution moves the precision positioning function from the spatial dimension (mechanical positioning systems) to the information dimension (visual guidance displayed on a separate device). The handheld camera remains compact while the display device provides dimensional separation, allowing precise positioning information to be communicated without increasing camera volume.
4Ease of operation
If the testee operates the fundus camera to self-shoot, then the ease of operation is improved, but the image quality deteriorates
Solution Approach 1:
The display device serves as an intermediary that bridges the gap between user operation and image quality. It provides guidance information that mediates the user's positioning actions, enabling self-shooting while maintaining image quality through structured visual instructions rather than requiring professional operator skill.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables users to self-shoot their fundus with better image quality by providing guide information on a display panel, allowing for precise alignment and illumination, overcoming the limitations of conventional cameras in portability and image clarity.
Implementation Method 1
The first lens group converges the illumination light provided by the illumination element to the tested eyeball
Implementation Method 2
An imaging light from the tested eyeball is converged by the first lens group and the second lens group to the image sensor to form a sensation image
Implementation Method 3
The light splitter is disposed on the second side of the first lens group, splitting an optical axis of the first lens group into a first sub-optical axis and a second sub-optical axis
Implementation Method 4
An image light generated by the first display panel is converged by at least the third lens group, the light splitter, and the first lens group in sequence to the tested eyeball
Data Source
AI summary
A fundus camera displays guide information on a display panel which can be viewed by a testee to guide the testee to adjust a relative position of the fundus camera and a tested eyeball of the testee to a determined position. Therefore, the testee can use the above-mentioned fundus camera to self-shoot fundus images with better image quality. A method for self-shooting fundus is also disclosed.