Photoelectric conversion module having dual circuit board and dual dust proofing member

A photoelectric conversion module, comprising:

• a housing including a first wall and a second wall parallel to each other, and an open end defined by respective ends of the first wall and the second wall;
• a photoelectric conversion element arranged in the housing;
• an integrated circuit arranged in the housing, the integrated circuit to be electrically connected with the photoelectric conversion element;
• a first circuit board arranged between the first wall and the second wall, the first circuit board being parallel thereto, and including adjacent to the open end an end that is connectable to an external device;
• a second circuit board arranged between the first wall and the second wall, the second circuit board being parallel thereto, and including adjacent to the open end an end that is connectable to the external device;
• electrode terminals provided at the ends of the first circuit board and the second circuit board respectively, the electrode terminals being electrically connected to the integrated circuit;
• a spacer disposed between the first circuit board and the second circuit board, the spacer including two pillars for defining a distance between the first circuit board and the second circuit board, and a beam extending between the pillars;
• a first dust proofing member for sealing a gap between the first wall and the first circuit board and a gap between the spacer and the first circuit board;
• and
• a second dust proofing member for sealing a gap between the second wall and the second circuit board and a gap between the spacer and the second circuit board,
• wherein the first circuit board further includes a first holding portion for holding the first dust proofing member, while the second circuit board further includes a second holding portion for holding the second dust proofing member.