Optical testing device

An optical testing device comprising:

• a base defining a sliding groove extending along a first direction in a top surface thereof;
• a holder sliding along a second direction on the top surface of the base;
• an interval regulator connected to the holder;
• and
• a plurality of illuminating modules slidably received in the sliding groove;
• wherein each of the illuminating modules comprises a circuit board and a single lighting element set on the circuit board, the interval regulator drives the holder to slide along a second direction so that a distance between the holder and the illuminating modules is regulated, and the first direction is not parallel to the second direction, wherein the sliding groove has a predetermined width along a direction perpendicular to a top surface of the base, and the illuminating module slides along the width direction of the sliding groove in a predetermined range;
• a height regulator set above the sliding groove along a direction perpendicular to the top surface of the base, wherein the height regulator comprises a driving pole telescopically extending along the width direction of the sliding groove, and a distal end of the height regulator is connected to the illuminating modules to regulate a height of the illuminating modules along the width direction of the sliding groove.