Measurement device and board inspection device

A board inspection device comprising:

• a board holder to hold a board on which an electronic component has been mounted;
• and
• a measurement unit to measure the board held by the board holder;
• wherein
• the measurement unit includes:
• an imager to image the board;
• a first projector on a first side with respect to the imager to project a linear first measurement light beam onto the board from a direction inclined at a first angle with respect to a horizontal direction;
• a second projector on the first side with respect to the imager to project a linear second measurement light beam onto the board from a direction inclined at a second angle different from the first angle with respect to the horizontal direction;
• and
• a controller configured or programmed to remove reflected light noise based on the first measurement light beam and the second measurement light beam projected onto the board and imaged by the imager and acquire height information of the board.

A measurement device comprising:

• an imager to image a measurement target;
• a projector to project a measurement light beam onto the measurement target from a direction inclined with respect to a horizontal direction;
• and
• a controller configured or programmed to acquire a height of a position of the measurement target onto which the measurement light beam is projected, and acquire a measurement height with a higher luminance of the measurement light beam as height information of the measurement target when a plurality of measurement heights are acquired for a same position due to reflected light noise caused by reflection of the measurement light beam from the measurement target.

A board inspection device comprising:

• a board holder to hold a board on which an electronic component has been mounted;
• and
• a measurement unit to measure the board held by the board holder;
• wherein
• the measurement unit includes:
• an imager to image the board;
• a projector to project a measurement light beam onto the board from a direction inclined with respect to a horizontal direction;
• and
• a controller configured or programmed to acquire a height of a position of the board onto which the measurement light beam is projected, and acquire a measurement height with a higher luminance of the measurement light beam as height information of the board when a plurality of measurement heights are acquired for a same position due to reflected light noise caused by reflection of the measurement light beam from the board.