Patent ID: 9599944
Date: 2017-03-21
CPC Classifications: B23K,G03G,H05K,Y02P

Claim:
1. An optical detector having a circuit substrate comprising: a light emitting element mounted on the circuit substrate; a light receiving element mounted on the circuit substrate; a first land portion to which a first electrode of the light emitting element is soldered; a second land portion to which the first electrode of the light emitting element is soldered; a third land portion to which a second electrode of the light emitting receiving element is soldered; a fourth land portion to which the second electrode of the light emitting receiving element is soldered; a fifth land portion to which a first electrode of the light receiving element is soldered; a sixth land portion to which the first electrode of the light receiving element is soldered; a seventh land portion to which a second electrode of the light receiving element is soldered; and an eighth land portion to which the second electrode of the light receiving element is soldered; and a cover member connected to the circuit substrate, configured to cover the light emitting element and the light receiving element, wherein the first electrode of the light emitting element and the second electrode of the light receiving element are arranged on the circuit substrate side by side, wherein a distance between the second land portion and the fifth land portion is greater than a distance between the first land portion and the second land portion, wherein a height of solder on the first land portion is higher than a height of solder on the second land portion, a height of solder on the third land portion is higher than a height of solder on the fourth land portion, a height of solder on the fifth land portion is higher than a height of solder on the sixth land portion, and a height of solder on the seventh land portion is higher than a height of solder on the eighth land portion, wherein the cover member has a first opening and a second opening, and wherein a light emitted to a member as an emitting object from the light emitting element passes through the first opening, and a reflected light emitted from the light emitting element passes through the first opening and is reflected by the member as the emitting object passes through the second opening and is received by the light receiving element.