Patent ID: 7420661

Claim:
An image detection apparatus comprising: an interposer; an illumination light emitting element mounted on the interposer for emitting a light toward a surface of a finger tip; an optical sensor chip mounted on the interposer, the optical sensor chip including an alignment of light receiving elements; a light guide member including a bundle of optical fiber parts, the light guide member being mounted on the optical sensor chip, the light guide member including a contact surface to which the surface of the finger tip is contacted, the contact surface being situated opposite from a surface to which the optical sensor chip is mounted; and a synthetic resin mold part being integrally formed with the interposer, the synthetic resin mold part covering the illumination light emitting element and the optical sensor chip and surrounding the light guide member; wherein an inclination angle of the optical fiber parts and a length of the light guide member satisfy a relation in which the length of the light guide member becomes shorter as the inclination angle of the optical fiber parts becomes larger; wherein the light guide member is mounted on the optical sensor chip at an inclination angle that ranges from 32 degrees to 48 degrees; and wherein the light guide member is adhered to the optical sensor chip via an adhesive layer having a thickness of approximately 50 μm; and wherein the adhesive layer has both a shock absorbing property and a thermal stress absorbing property.