Interactive holographic blackboard system

The embodiment of the utility model provides an interactive holographic blackboard system, including L type projecting apparatus, location teacher's pointer, dynamic natural frequency and server, theserver is pounced on the equipment of catching and is connected with L type projecting apparatus, action respectively. L type projecting apparatus is used for receiving the image signal and the switching signal of server input to utilize image signal respectively to predetermined vertical plane, horizontal plane vector projection image, still be used for switching throwing the content according toswitching signal, the location teacher's pointer is used for the operation shift position along with the user to transmission teacher's pointer framing signal, the action is pounced on the equipmentof catching and is used for catching the teacher's pointer framing signal to fix a position the teacher's pointer for signal output to server, the server is used for exporting image signal to according to the real -time positio