Abstract: An endoscope system, including a rigid endoscope and a photography system, wherein the rigid endoscope includes an external endoscope tube and a connecting housing; the photography system includes a photographic objective lens group and an image sensor; the external endoscope tube includes a first end and a second end; the connecting housing is directly connected to the second end of the external endoscope tube; the photographic objective lens group is arranged on the side of the connecting housing that is away from the external endoscope tube; the image sensor is arranged on the side of the photographic objective lens group that is away from the connecting housing; the photography system is detachably connected to the connecting housing; the photographic objective lens group is configured to directly magnify an image transmitted by the rigid endoscope; and the image sensor is configured to convert the magnified image into an electric signal.

Abstract: A lighting source and an endoscope are provided, and the lighting source is used for the endoscope. The lighting source includes a light-emitting diode (LED) chip and a substrate; the LED chip is arranged on and fixedly connected to the substrate, and is packaged into the lighting source; and the lighting source is circular ring-shaped or arc-shaped. The endoscope includes an endoscope tube; an objective lens, located at one end of the endoscope and at least partially located inside the endoscope tube; and the lighting source.

Abstract: A rigid endoscope includes an endoscope tube, a light-emitting diode (LED) chip, an objective lens group, a rod lens group and a lead. the objective lens group and the rod lens group are disposed in the endoscope tube and arranged in a direction from a front end to a rear end of the endoscope tube; the LED chip is mounted at the front end of the endoscope tube; and the lead is led out from the LED chip, runs through a gap between an inner circle of the endoscope tube and an outer circle of the objective lens group, and arrives at the rear end of the endoscope tube.