Optical trapping skirt for adjusting the diameter of a beam passing thereof

1. Field of the Invention The invention provides an optical trapping skirt for adjusting the diameter of a beam passing thereof by varying the aperture. The optical trapping skirt has a body of bell shape and an iris diaphragm of bell shape, wherein the iris diaphragm of bell shape is installed insi...

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Bibliographic Details
Main Authors Lin, Yaomin, Wang, Hau-Wei, Lo, Chieh-Yi
Format Patent
LanguageEnglish
Published 23.12.2003
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Summary:1. Field of the Invention The invention provides an optical trapping skirt for adjusting the diameter of a beam passing thereof by varying the aperture. The optical trapping skirt has a body of bell shape and an iris diaphragm of bell shape, wherein the iris diaphragm of bell shape is installed inside the body so as to construct a ring like cavity. The undesired portion of the beam, which is incident on the iris diaphragm, is trapped in the ring like cavity and cannot be escaped. The aperture of the iris diaphragm is adjustable, so the diameter of the beam passing the optical trapping skirt is also controllable.