Patent ID: 6650483
Filing Date: 2003-11-18
Classification: G02B

Abstract:
An optical device comprising:a first optical unit including a first optical element which has two refracting surfaces and a plurality of curved reflecting surfaces, wherein a light beam entered into the first optical element via one of the refracting surfaces of the first optical element is sequentially reflected by the plurality of curved reflecting surfaces and is output from the other refracting surface of the first optical element; a second optical unit including a second optical element which has two refracting surfaces and a plurality of curved reflecting surfaces, wherein a light beam entered into the second optical element via one of the refracting surfaces of the second optical element is sequentially reflected by the plurality of curved reflecting surfaces and is output from the other refracting surface of the second optical element; and a guide member engaged with the first and second optical units, wherein the first and second optical units move along the guide member.