Patent ID: 8797536

Claim:
A portable digital reader for reading a target chip including a plurality of test regions, the portable digital reader comprising: a support configured to receive the target chip; a light emitter including light emitting elements and emitting light; an integrated light distributor comprising: a stem part extending from the light emitter in a traveling direction of the light, the stem part being configured to reflect light from the light emitter; and a plurality of branch parts extending toward the support from the stem part; wherein a surface of the stem part has a predetermined curvature based on a distance between branch parts to totally reflect the light incident on the stem part toward the branch parts, the light incident on the stem part being distributed to the target chip through a branch part; a light receiver configured to receive the light, which is reflected from each test region, and convert the received light into an electric signal; and a measuring part configured to measure a concentration based on the electric signal received from the light receiver.