Biosensor

A biosensor comprising:

• a wiring board;
• a light emitting element and a light receiving element disposed on a principal surface of the wiring board;
• a light-emitting-element sealer disposed on the principal surface of the wiring board and adjacent to the light emitting element to seal the light emitting element;
• a light-receiving-element sealer disposed on the principal surface of the wiring board and adjacent to the light emitting element to seal the light receiving element;
• a light shielding portion disposed between the light-emitting-element sealer and the light-receiving-element sealer;
• and
• a cover with light transmitting properties disposed in parallel with the wiring board with the light emitting element, the light receiving element and the light shielding portion disposed therebetween,
• wherein the cover is at least partially divided such that an angle between a direction in which the cover is partially divided and a straight line connecting the light emitting element and the light receiving element in a plane parallel to the principal surface of the wiring board is less than or equal to 50°.

A biosensor comprising:

• a wiring board;
• a light emitting element and a light receiving element disposed on a principal surface of the wiring board;
• a light-emitting-element sealer disposed on the principal surface of the wiring board and adjacent to the light emitting element to seal the light emitting element;
• a light-receiving-element sealer disposed on the principal surface of the wiring board and adjacent to the light emitting element to seal the light receiving element;
• a light shielding portion disposed between the light-emitting-element sealer and the light-receiving-element sealer;
• and
• a cover with light transmitting properties disposed in parallel with the wiring board with the light emitting element, the light receiving element and the light shielding portion disposed therebetween,
• wherein the cover is fully divided such that an angle between a direction in which the cover is partially divided and a straight line connecting the light emitting element and a light receiving element in a plane parallel to the principal surface of the wiring board is less than or equal to 50°.

A biosensor comprising:

• a wiring board;
• a light emitting element and a light receiving element disposed on a principal surface of the wiring board;
• a light-emitting-element sealer disposed on the principal surface of the wiring board and adjacent to the light emitting element to seal the light emitting element;
• a light-receiving-element sealer disposed on the principal surface of the wiring board and adjacent to the light emitting element to seal the light receiving element;
• a light shielding portion disposed between the light-emitting-element sealer and the light-receiving-element sealer;
• and
• a cover with light transmitting properties disposed in parallel with the wiring board with the light emitting element, light receiving element and the light shielding portion therebetween,
• wherein the cover comprises a bottom surface having a plurality of grooves.