Light receiving lens assembly and projection cylinder comprising same

A projection cylinder, comprising:

• a body, provided with a light inlet and a light outlet;
• wherein the light inlet is able to be connected to an external light source, an optical channel is provided between the light inlet and the light outlet, a light effect component is provided in the optical channel, and the light effect component is provided at one end of the optical channel close to the light outlet;
• an accommodation cavity, provided at one end of the optical channel close to the light inlet;
• and
• a light receiving lens assembly detachably provided in the accommodation cavity;
• wherein the light receiving lens assembly detachably provided in a projection cylinder, comprises:
• a housing, provided with a front light receiving opening and a rear light receiving opening, wherein a light receiving channel is provided between the front light receiving opening and the rear light receiving opening;
• a light receiving lens, provided in the light receiving channel, wherein the light receiving lens comprises a front lens and a rear lens, and the front lens is provided at a front end of the housing, and the rear lens is provided at a rear end of the housing;
• wherein one end of the housing close to the front light receiving opening is provided with a front installation groove, and one end of the housing close to the rear light receiving opening is provided with a rear installation groove;
• and
• the front lens is detachably provided in the front installation groove, and the rear lens is detachably provided in the rear installation groove.