Spectrum detection apparatus

A spectrum detection apparatus, comprising at least one spectrum detection unit, wherein each of the at least one spectrum detection unit comprises:

• a light source, configured to emit light;
• an optical substrate, comprising an optical medium layer, wherein the optical medium layer comprises a first surface and a second surface opposite to the first surface, the first surface is closer to the light source than the second surface, and a refractive index of the optical medium layer is higher than 1, and wherein the optical substrate further comprises a light inlet, a first light-shielding layer, a grating and a light outlet sequentially arranged on the first surface and in an extension direction of the optical medium layer, the light inlet is arranged corresponding to the light source and is configured to guide the light emitted by the light source into the optical medium layer under the light inlet, the first light-shielding layer is configured to reflect target light and absorb non-target light, and the grating is configured to perform diffractive dispersion on the target light;
• a micro-fluid substrate, arranged on a side of the optical substrate proximate to the light source and comprising at least one micro-fluid channel configured to accommodate a micro-fluid, wherein the light outlet is configured to guide light dispersed by the grating and thereafter reflected by the second surface into the at least one micro-fluid channel;
• and
• a sensor substrate, arranged at a side of the micro-fluid substrate facing away from the optical substrate, and comprising at least one photosensitive sensor that is configured to detect light exiting from the at least one micro-fluid channel.