Patent ID: 7678566

Claim:
A chromatography quantitative measuring apparatus for applying a beam to a chromatography specimen on which a sample is added, detecting an optical signal from a transmitted light or reflected light from the chromatography specimen, and quantitatively reading a concentration of the sample from the detected optical signal, said apparatus comprising: a laser for emitting a beam to the chromatography specimen; and an optical mechanism for forming the beam emitted from said laser into an elliptically-shaped beam having an area smaller than a detection area of the chromatography specimen and applying the elliptically-shaped beam to the chromatography specimen such that a long side of the elliptically-shaped beam applied to the chromatography specimen is shorter than a width of the chromatography specimen in a width direction of the chromatography specimen perpendicular to a longitudinal direction of the chromatography specimen, and a short side of the elliptically-shaped beam applied to the chromatography specimen is shorter than a width of the detection area of the chromatography specimen, said optical mechanism comprising: a collimator lens for converting the beam emitted from said laser into a collimated beam; a circular aperture member for shaping a long side of the collimated beam that has passed through said collimator lens; and a cylindrical lens for shaping a short side of the collimated beam that has passed through said aperture member, thereby shaping the collimated beam into an elliptically-shaped beam.