Spectroscope

A spectroscope comprising:

• a package provided with a light entrance part;
• a plurality of lead pins penetrating through a support part opposing the light entrance part in the package;
• a light detection unit supported on the support part within the package;
• and
• a spectroscopic unit supported on the support part within the package so as to be arranged on the support part side of the light detection unit;
• wherein the light detection unit has a light transmission part for transmitting therethrough light incident thereon from the light entrance part;
• wherein the spectroscopic unit has a spectroscopic part for spectrally resolving the light transmitted through the light transmission part while reflecting the light to a light detection part of the light detection unit;
• wherein the lead pins are fitted into fitting parts provided with the light detection unit and electrically connected to the light detection part;
• wherein the light detection unit is provided at a distance from the spectroscopic unit so as to form a space through which the light is transmitted, the light being reflected between the light detection unit and the spectroscopic unit on the spectroscopic part and reaching the light detection unit;
• wherein the spectroscopic unit is formed on a surface facing the light detection unit, a reverse side on an opposite side to the surface facing the light detection unit being secured to the support part while in contact therewith;
• and
• through the plurality of lead pins, the light transmission part provided with the light detection unit is positioned with respect to the light entrance part provided with the package at least in a direction perpendicular to the direction in which the light entrance part and the support part oppose each other.