Patent ID: 7259849

Claim:
An optical system for an analyzing system for irradiating a sample with light beams to optically analyze the sample, said optical system comprising: a plate member having a first space, a second space, and a third space for receiving the sample therein; a first lens surface, formed on one end face of said first space, for receiving light beams from a light source via a light guide passage, said first lens surface being an aspheric surface which is convex toward said light guide passage; a second lens surface, formed on one end face of said second space, for receiving the light beams passing through said first lens surface, said second lens surface being an aspheric surface which is concave toward said first lens surface; and a third lens surface, formed on the other end face of said second space, for receiving the light beams passing through said second lens surface, said third lens surface being an aspheric surface which is convex toward said second lens surface, said first, second and third lens surfaces being associated with each other for condensing the light beams toward said third space.