Imaging system and projection device

A projection device, comprising an illumination system, an imaging system, and a projection lens, wherein:

• the illumination system is configured to provide an illumination beam;
• the imaging system comprising a housing, a light-splitting element, a light valve module, and a compensation module, wherein:
• the light valve module is disposed on a transmission path of the illumination beam and is configured to convert the illumination beam into an image beam;
• the light-splitting element is disposed on the transmission path of the illumination beam and is configured to reflect the illumination beam and allow the image beam to pass through;
• the compensation module is disposed between the light valve module and the light-splitting element, and the compensation module comprises a carrier element, a compensation element and an adjustment element, wherein the adjustment element is configured to detachably fix the carrier element, wherein:
• the carrier element comprises a slot, the carrier element is configured to rotate around a rotation axis;
• the compensation element is disposed in the slot and is located on the transmission path of the illumination beam and a transmission path of the image beam,
• wherein the carrier element is configured to rotate around the rotation axis according to a position of the adjustment element, the housing comprises a position limiting trench, the adjustment element is located in the position limiting trench, and the adjustment element is configured to change the position in the position limiting trench so as to rotate the carrier element;
• and
• the projection lens is disposed on the transmission path of the image beam and is configured to project the image beam out of the projection device.