Apparatus for photon detection including a sample cell with an outer surface with a curved bottom, and a pinhole created on a pinhole plate

摘要

The object of the present invention is to acquire the brightness of NA1 while alleviating the requirement for the precision of positioning for the collection lens of the sample cell in a non-liquid immersion system. In order to achieve the object mentioned above, the bottom of the sample cell is formed in a curved surface, and an arrangement is made to ensure that the fluorescence irradiated from the focusing point would be parallel pencils when emitted by the cell, and in addition a pinhole is disposed at the focal point of the fluorescence collection lens.