研究目的
To achieve high-precision measurements of human corneal thickness and anterior chamber depth using laser self-mixing interference.
研究成果
The research successfully developed a method for measuring corneal thickness and anterior chamber depth using laser self-mixing interference, achieving micrometer-level accuracy. The system's simplicity and single light path offer advantages over more complex measurement systems.
研究不足
The measurement accuracy is at the micrometer level with errors below 4%. The study focuses on the cornea and anterior chamber, not considering other parts of the eye.
1：Experimental Design and Method Selection:
The study designs an equivalent double-membrane system to simulate the physiological structure of the cornea and anterior chamber of the human eye. Laser is used to irradiate the system, and the reflected light undergoes self-mixing interference with the original light. A photodetector collects and processes the interference signals to measure the corneal thickness and anterior chamber depth.
2：Sample Selection and Data Sources:
The study uses an equivalent human-eye optical system for measurements.
3：List of Experimental Equipment and Materials:
LSDLD1550 laser source, GPS-4304C constant current source, SFG-211 signal generator, NI USB-6341 signal acquisition card, LabView for signal analysis, spectroscopes with different reflective indexes, and optical plane mirrors.
4：Experimental Procedures and Operational Workflow:
The laser diode irradiates the double-membrane system, and the reflected light is collected by a photodetector. The interference signals are processed to obtain measurements of corneal thickness and anterior chamber depth.
5：Data Analysis Methods:
The laser output power is analyzed to determine the corneal thickness and anterior chamber depth, with errors calculated between measuring and theoretical values.
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