How to Sun-proof glass sliding door?

I live in a third floor apartment, I get lot of sun right into my living room through the large sliding doors even with the vertical blinds closed. Is there any cheeper way to sun-proof the sliding doors with out causing too much damage to the glass? I live in an apartment, so this has to be something I should be able to undo.

One way to get thick curtains to keep the sun out. Are there any tinted sheets or something which I can put on the glass?