Apparatus for holding lens holder

An apparatus for holding lens holders, comprising:

• a first board comprising a plurality of through slots defined therein, the first board having a first inner surface and an opposite second inner surface in each of the slots, a plurality of spaced grooves defined in each of the first inner surfaces;
• a second board comprising a base portion, a plurality of elongated protrusions for insertion in and sliding in the respective slots, the protrusions extending from the base portion, each of the protrusions having a first surface facing the corresponding first inner surface, an opposite second surface facing the corresponding second inner surface, and a plurality of grooves defined in the first surface, the grooves of the protrusions aligned with the respective grooves in the first surface;
• and
• the first board and the second board attached to each other with the protrusions inserted in the slots, the first board and the second board cooperatively forming a plurality of receptacles between the first inner surfaces in the slots and the first surface of the protrusions;
• a platform with one of the first board and the second board secured thereon;
• and
• a driving device for driving the other one of the first board and the second board to move relative to the one secured on the table to change a size of the receptacles.