Patent ID: 7443502

Claim:
Microchip testing device with a microchip with an absorbance measuring chamber, a transmitted light receiving unit for receiving light which has been emitted from a light source and has been transmitted through the absorbance measuring chamber, an aperture, which extends in a straight line in a direction of an optical axis of the absorbance measuring chamber, having an inlet opening for the light emitted by the light source on one end and a light exit opening on an opposite end, by which the light enters the absorbance measuring chamber; an incident light beam splitter located in the optical path between the light exit opening of the aperture and the absorbance measuring chamber and which transmits one part of the incident light and reflects another part of it, and a reflected light receiving part for receiving the part of the incident light reflected by the beam splitter wherein the microchip has a projection which protrudes beyond a partial section of one of its side edges and which has a side face which is opposite the light exit opening of the aperture and wherein the projection contains the chamber for measuring absorbance.