| 摘要 |
<p>An optical scanning microscope in which light from a laser source (1) is focussed onto an object (3) and is collected by a detector. The detector has a radiation sensitive area which is split into two parts (6, 7) by a dividing line crossing the radiation axis of the microscope. That part of the radiation sensitive area (6, 7) which is close to the axis is obscured. Various ways of doing this are discussed in the text; one way is a simple stop (8), such as that shown, which has an annular cut-out, thus giving an effective radiation sensitive area of annular shape. This has been found to improve the imaging performance of the detector.</p> |
