| 摘要 |
An interferometer according to the invention is made up of a shearing element (13) for amplitude division by reflection of an incident beam of electromagnetic radiation into two parts, each part having a wavefront with a direction of propagation that is substantially parallel to the other, the two parts being displaced relative to each other in a direction transverse to the direction of the incident beam so as to cause interference fringes between the two parts; and a mounting element (15) for supporting the shearing element (13) and for rotating the shearing element (13) by small amounts about an axis transverse to the incident beam. In the preferred mode, the shearing element (13) is a shearing plate with flat faces and is made of a transparent material. |
