Optical module and camera module including optical module

A camera module comprising:

• a holder;
• a reflective member disposed on the holder and configured to reflect light;
• a guide member on which the holder is disposed;
• a housing in which the holder and the guide member are disposed;
• a first ball member disposed between the guide member and the housing and comprising a plurality of balls;
• and
• a first lens module having a first optical axis and on which light reflected from the reflective member is incident,
• wherein the guide member is configured to be rotatable together with the holder about a first rotational axis,
• the holder is configured to be rotatable relative to the guide member about a second rotational axis perpendicular to the first rotational axis,
• one of the housing and the guide member comprises a protrusion protruding in a direction of the first rotational axis, and another one of the housing and the guide member comprises a guide groove,
• the plurality of balls of the first ball member are in contact with a surface of the protrusion and a surface of the guide groove, and
• either one or both of the surface of the protrusion in contact with the plurality of balls of the first ball member and the surface of the guide groove in contact with the plurality of balls of the first ball member is an inclined surface that is inclined with respect to the first rotational axis.

An optical module comprising:

• a housing;
• and
• a reflective module disposed in the housing and configured to be rotatable about a first rotational axis with respect to the housing,
• wherein a first guide groove having a circular planar shape centered on the first rotational axis is formed in a surface of the reflective module facing the housing,
• a second guide groove having a circular planar shape centered on the first rotational axis is formed in a surface of the housing facing the surface of the reflective module in which the first guide groove is formed,
• the optical module further comprises a first ball member comprising a plurality of balls disposed between the first guide groove and the second guide groove, and
• the plurality of balls of the first ball member are equidistantly spaced apart from one another in a circumferential direction around the first rotational axis and are configured to roll in the circumferential direction while the reflective module rotates with respect to the housing.

A optical module comprising:

• a housing;
• a reflective module disposed in the housing and configured to be rotatable about a first rotational axis with respect to the housing;
• a first coil disposed on a surface of the housing facing the reflective module;
• a first magnet disposed on a surface of the reflective module facing the surface of the housing on which the first coil is disposed so that the first magnet faces the first coil;
• and
• a first ball member comprising a plurality of balls disposed between the surface of the housing on which the first coil is disposed and the surface of the reflective module on which the first magnet is disposed,
• wherein the first coil and the first magnet are configured to rotate the reflective module about the first rotational axis with respect to the housing, and
• the plurality of balls of the first ball member are equidistantly spaced apart from one another other in a circumferential direction around the first rotational axis and are configured to roll in the circumferential direction while the reflective module rotates with respect to the housing.