Biosensor

A biosensor comprising:

• a wiring board having a principal surface;
• a light emitting element and a light receiving element disposed on the principal surface of the wiring board;
• a light-emitting-element sealer having light transmitting properties and disposed on the principal surface of the wiring board to seal the light emitting element;
• a light-receiving-element sealer having light transmitting properties and disposed on the principal surface of the wiring board 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 shielding portion therebetween,
• wherein the cover is disposed such that end portions of the cover do not intersect a line extending in a direction normal to the principal surface of the wiring board and through the light emitting element or the end portions of the cover do not intersect a line extending in the direction normal to the principal surface of the wiring board and through the light receiving element.

A biosensor comprising:

• a wiring board having a principal surface;
• a light emitting element and a light receiving element disposed on the principal surface of the wiring board;
• a light-emitting-element sealer disposed on the principal surface of the wiring board to seal the light emitting element;
• a light-receiving-element sealer disposed on the principal surface of the wiring board to seal the light receiving element;
• a light shielding portion disposed between the light-emitting-element sealer and the light-receiving-element sealer;
• a base medium with light transmitting properties disposed above the wiring board with the light shielding portion therebetween;
• and
• an adhesion layer with light transmitting properties disposed on at least one of the light shielding portion, the light-emitting-element sealer and the light-receiving-element sealer, wherein the adhesion layer bonds the base medium to the at least one of the light shielding portion, the light-emitting-element sealer portion and the light-receiving-element sealer,
• wherein respective end portions of the adhesion layer and end portions of the base medium each closer to the light receiving element do not overlap the light-receiving-element sealer, when viewed from a direction normal to the principal surface of the wiring board.

A biosensor comprising:

• a wiring board having a principal surface;
• a light emitting element and a light receiving element disposed on the principal surface of the wiring board;
• a light-emitting-element sealer disposed on the principal surface of the wiring board to seal the light emitting element;
• a light-receiving-element sealer disposed on the principal surface of the wiring board to seal the light receiving element;
• a light shielding portion disposed between the light-emitting-element sealer and the light-receiving-element sealer;
• a base medium with light transmitting properties disposed above the wiring board with the light shielding portion therebetween;
• and
• an adhesion layer with light transmitting properties disposed on at least one of the light shielding portion, the light-emitting-element sealer and the light-receiving-element sealer, wherein the adhesion layer bonds the base medium to the at least one of the light shielding portion, the light-emitting-element sealer portion and the light-receiving-element sealer,
• wherein respective end portions of the adhesion layer and end portions of the base medium each closer to the light emitting element do not overlap the light-emitting-element sealer, when viewed from a direction normal to the principal surface of the wiring board.