Scanning line adjuster, optical scanner incorporating the scanning line adjuster, and image forming apparatus incorporating the optical scanner

A scanning line adjuster comprising:

• an optical element disposed on an optical path extending from a light source to a scanned target object, the optical element having a positioning portion;
• an attitude changer to change an attitude of the optical element;
• and
• an optical element positioner to position the optical element,
• the optical element positioner to contact the positioning portion of the optical element in a direction perpendicular to a moving direction in which the positioning portion of the optical element moves when the attitude changer changes the attitude of the optical element,
• the positioning portion of the optical element including a contact end to contact the optical element positioner,
• the contact end made of a different material from a material of the optical element.

A scanning line adjuster comprising:

• an optical element disposed on an optical path extending from a light source to a scanned target object, the optical element having a positioning portion;
• an attitude changer to change an attitude of the optical element;
• an optical element positioner to position the optical element,
• the optical element positioner to contact the positioning portion of the optical element in a direction perpendicular to a moving direction in which the positioning portion of the optical element moves when the attitude changer changes the attitude of the optical element;
• and
• a pressing unit to press the positioning portion of the optical element against the optical element positioner,
• the pressing unit including a contact end to contact the positioning portion of the optical element,
• the contact end made of a different material from a material of the pressing unit.