Projecting device for generating light effect of galactic starry sky and projecting lamp

A projecting lamp, comprising:

• a first housing opened and provided with a first mounting hole;
• a light-emitting assembly arranged within the first housing, the light-emitting assembly comprising at least one first incoherent light source and at least one first condensing lens, and the first condensing lens being arranged on an illuminating surface of the first incoherent light source;
• a film assembly arranged within the first mounting hole, the film assembly comprising a film sheet provided with a galactic starry sky pattern, and the film sheet being arranged on the other side of the first condensing lens relative to the first incoherent light source;
• and
• an imaging assembly arranged within the first housing, the imaging assembly comprising at least three lenses, the three lenses being an imaging lens, an adjusting lens, and a wide-angle lens arranged sequentially in a projection direction of the film sheet, respectively;
• the film assembly comprises a second housing and a film tray, the film sheet is arranged on the film tray, the second housing corresponding to the position of first mounting hole is fixed in the first housing, and the film tray is inserted in the first mounting hole and extends into the second housing.