Patent ID: 7684042

Claim:
A micro particle analyzing device illuminating light to fluid including micro particles, reading a fluorescent light emitted from the micro particles at a signal processing reading section, and thus analyzing the micro particles, comprising: a light source section emitting light which will be illuminated to the fluid; a lens regulating an amount and a focal distance of the light emitted from the light source; and a concave mirror condensing the fluorescent light emitted from the micro particle to reflect it to the reading section, wherein: a hole is formed in the concave mirror so that the light of the light source section having passed through the lens can pass through the concave mirror; the lens is a convex lens and the convex lens is optically combined with the concave mirror; and the numerical aperture of the convex lens is less than 0.1 and the numerical aperture of the concave mirror is 0.1 or more, wherein the hole is situated at a place deviated from a central axis of the parabolic mirror, wherein a diameter of the hole is about 1 mm˜2 mm.