The invention belongs to the field of instrument detection, and provides a parallel low-light-loss backlight high-temperature industrial
endoscope. The parallel low-light-loss high-temperature backlight industrial
endoscope comprises an optical
eyepiece used for obtaining an image in a furnace, a
light source luminous part, a
light source drive circuit, a communication circuit, an image guide
fiber bundle, a
light guide structure, an imaging
chip, an imaging drive circuit, a cooling
system and a shell. The shell comprises a circular tube and a square shell body. The
light guide structure comprises an ellipsoidal concave mirror, a round convex lens and a
light guide light path, wherein the ellipsoidal concave mirror is arranged on the rear portion of the
light source luminous part, and the round convex lens is opposite to the light source luminous part. The front end of the circular tube is provided with the optical
eyepiece and a backlight hole, and an image obtaining probe is connected with the imaging
chip through the image guide
fiber bundle. A novel backlight technology is provided, an original light-guide
fiber backlight mode is converted into a parallel light direct backlight mode, the structure of the light path is simplified, the
utilization rate of
light energy is improved, the backlight area and brightness are increased, constrains to backlight light sources are eliminated, and the parallel low-light-loss high-temperature backlight industrial
endoscope is suitable for various light sources, improves stability of equipment and reduces equipment cost.