Patent ID: 7474471

Claim:
An optical unit comprising: a closed hollow body defining an enclosed chamber therein, and having an optical part that confines a portion of said chamber and that is deformable so as to be changeable in thickness and shape in response to changes in an inner pressure in said enclosed chamber, said optical part having a resilient web that is changeable in shape and thickness in response to changes in the inner pressure of said enclosed chamber, and a light directing layer that is formed on said resilient web and that is co-changeable in shape with said resilient web in response to changes in the inner pressure of said enclosed chamber, wherein said closed hollow body further has a rigid mounting part that has an open end, and a resilient connecting part that is connected sealingly to and that extends from a periphery of said open end of said rigid mounting part, said resilient connecting part extending from a periphery of said resilient web of said optical part, being integrally formed with said resilient web, and cooperating with said resilient web and said mounting part to define said enclosed chamber thereamong, and wherein said resilient connecting part is tapered from said resilient web to said mounting part.