Separable optical hard-tube lens based on LED illumination

The invention discloses a separable optical hard-tube lens based on LED illumination. The separable optical hard-tube lens comprises a main lens body, a lens tube, an imaging system composed of an objective lens, a bar lens and an eye lens, an LED patch and an eye lens tube. The LED patch is installed between an inner lens tube and an outer lens tube and located at the front end of the lens tube, and a wire led out of the LED patch penetrates a communication gap and reaches the rear end of the eye lens tube. The eye lens is installed in the eye lens tube, the eye lens tube extends in from the front end of the main lens body, and the lens tube is connected with the main lens body in a separable mode. Die-cast lenses are adopted as the objective lens, the bar lens and the eye lens. The die-cast lenses are adopted for the imaging system to reduce the cost of the optical hard-tube lens, and meanwhile the imaging quality is improved through aspheric surface imaging. The lens tube is connected with the main lens body in the separable mode, a user can use the separable optical hard tube lens conveniently, and the separable optical hard tube lens can be used in quantity in clinics, so that cost is saved greatly for hospitals and patients, and cross infection is avoided. By means of the LED illumination mode, cost is reduced, the angle, brightness and evenness of illumination are increased, and finally the imaging quality is improved.