Spectrophotometer, spectrometer, and method of manufacturing spectrophotometer

A spectrophotometer, comprising:

• a light source;
• a condenser lens that collects light emitted from the light source;
• a slit that diffracts the light collected by the condenser lens;
• a concave diffraction grating that splits the light passing through the slit;
• and
• a multi-wavelength detector having a plurality of photodetection elements that detect the light split by the concave diffraction grating,
• wherein each opening of the photodetection element mask to be arranged on the surface of the multi-wavelength detector is arranged at an image position of the concave diffraction grating.

A method of manufacturing a spectrophotometer comprising:

• a light source;
• a condenser lens that collects light emitted from the light source;
• a slit that diffracts the light collected by the condenser lens;
• a concave diffraction grating that splits the light passing through the slit;
• and a multi-wavelength detector having a plurality of photodetection elements that detect the light split by the concave diffraction grating, the method comprising:
• arranging each opening of a photodetection element mask to be arranged on a surface of the multi-wavelength detector at an image position of the concave diffraction grating.