Photodetector for positioning device of photo-detection unit for spectrometer, has two photosensitive surface that are separated from each other, and are arranged to each other in a mirror-inverted manner to form total surface of rectangle

摘要

The photodetector (10) has a photosensitive surface (1), which has the shape of a right-angle triangle. Two photosensitive surfaces are separated from each other. Every photosensitive surface has the shape of a right-angle triangle, and is arranged to each other in a mirror-inverted manner to form the total surface of the rectangle.