لا يمكن استخدام مصدر ضوء LED لعلاج الأمراض فقط, ولكن يمكن استخدامها أيضًا لتشخيص الأمراض, مثل تشخيص أمراض البروستاتا, مرض فتق القرص القطني, مرض قاع العين, سرطان المعدة المبكر, سرطان القولون المبكر, سرطان الجلد, and can be used for the initial diagnosis of hereditary and infectious diseases. LED light source has a wide wavelength range, pure spectrum and controllable beam, which can be used for biological cell detection and diagnosis, which can reduce the interference of stray light and improve the accuracy of detection and diagnosis. In addition, the small size of the LED light source reduces the volume of the diagnostic instrument, which can realize the detection and diagnosis of the dead Angle.

1) LED is used for fluorescence spectrum detection. Because the LED light source has the characteristics of long life, small size, low voltage power supply, pure spectrum and high luminous efficiency, as the excitation light source of fluorescence spectrum detection technology, it is not only safe, stable and reliable, but also simple to operate, which can realize the miniaturization and portable design of LED fluorescence spectrum detection equipment, but also conducive to data acquisition and analysis. In clinical disease diagnosis, LED fluorescence spectrum detection technology has the advantages of non-injury, good specificity and high sensitivity, and has been paid attention to by medical personnel. LED fluorescence spectrum detection technology has been used for the early diagnosis of small cancerous changes and atypical tissue hyperplasia that are difficult to find by the naked eye, for inducing human blood to produce fluorescence spectrum to realize the detection and analysis of blood, for early indoor and outdoor environmental skin disease diagnosis, for the diagnosis of dental stones and so on. In addition, LED fluorescence spectrum detection technology is also used to detect medical drugs, detect flavomycin, detect pesticide residues, field detection of seaweed, etc., the application range is very broad.

2) LED medical endoscope. LED light source small size, good color performance, light color adjustable, etc., making LED medical endoscope with miniaturization, simple operation, safe and reliable advantages, and can improve the doctor’s ability to distinguish different tissues, easy to reach more narrow parts, such as blood vessels, lymph, إلخ. It is mainly used for the detection and diagnosis of digestive tract diseases, intestinal diseases, early cancer of middle and lower pharynx, esophageal intraepithelial cancer, early cancer of stomach, early cancer of large intestine and other diseases.

3) LED medical image viewing light. Medical image viewing lamp is an instrument to obtain diagnostic information of digital image directly, and its performance directly affects the quality of diagnosis. LED light source has the advantages of high luminous efficiency, adjustable brightness color temperature, small beam Angle, narrow spectrum, small size, إلخ. Applied to medical image viewing lamps, it can expand the brightness range, eliminate the negative light effect, improve image information reading rate, reduce user visual fatigue, and have the advantages of energy saving, easy maintenance, easy operation, long service life. LED medical image viewing lamp also has the characteristics of mobile operation and low voltage power supply, which is suitable for clinical room medical staff to read the film at the bedside during ward round, and can be used for emergency reading and diagnosis of medical institution personnel in the absence of power supply or power failure. It not only improves the accuracy and quality of digital image photo diagnosis, but also improves the efficiency of medical image diagnosis. It can also improve the visual comfort of medical workers in diagnosis.

In addition, other applications of LED light source in biomedical diagnosis are: ① LED visual acuity table light box made of LED light source, suitable for ophthalmology and optometry clinical diagnosis, visual acuity measurement of academic research, etc., can easily replace visual markers, eliminate the possibility of memorization of visual markers, and ensure the accuracy of visual diagnosis results. (2) The LED fluorescence microscope made of LED light source has excellent image quality and features of intelligent automation. It is used for tuberculosis laboratory diagnosis of Mycobacterium tuberculosis, and its diagnostic effect is better than the traditional Ziehl-Neelsen smear microscopy method to a certain extent. (3) The LED live detection device made of LED is used to diagnose and identify finger veins, which can accurately detect whether the vein characteristics of users trying to enter the system are living, to a certain extent, avoid the influence of forged characteristics on the subsequent recognition system, and increase the reliability of the reflex finger vein recognition system. In addition, the LED light source can also be used to make an animal live imaging system to detect weak fluorescence in the living body.