Apparatus for growing a single crystal

An object of the present invention provides an inexpensive and simple single crystal growing apparatus compact. Small single crystal growing apparatus of the present invention includes a rotary ellipsoidal mirror 11, and one side of the focal point F The focus F Because with the small rotational ellipsoidal mirror 11, 12 prevent excessive temperature rise of the rotary ellipsoidal mirror 11, 12 and lamps 13 and 14, rotary ellipsoidal mirror 11 and 12 incorporates a water-cooling jacket 39, 40 , air cooling unit 45a from the gap 43, 44 of the rotary ellipsoidal mirror 11 to introduce the cooling air at a flow rate of 1.2~2.3m