Two-lens optical system, beam combining module, projector, and method for assembling two-lens optical system

A method for assembling a two-lens optical system,

• the two-lens optical system including:
• a first lens;
• a first support base configured to constrain movement of the first lens in such a manner that the first lens is movable along only an optical axis of light emitted from a light source;
• a second lens;
• and
• a second support base configured to constrain movement of the second lens in such a manner that the second lens is movable along only two axes perpendicular to the optical axis, the method comprising the steps of:
• (a) moving the first lens along the optical axis for collimation adjustment of the two-lens optical system;
• (b) after the step (a), moving the second lens along at least one of the two axes for beam steering of the two-lens optical system;
• (c) after the step (a) or (b), fixing the first lens to the first support base;
• and
• (d) after the step (b), fixing the second lens to the second support base.

A method for assembling a two-lens optical system,

• the two-lens optical system including:
• a first support base configured to move along only an optical axis of light emitted from a light source,
• a first lens configured to move together with the first support base;
• a second support base configured to move along only two axes perpendicular to the optical axis;
• and
• a second lens configured to move together with the second support base, the method comprising the steps of:
• (a) moving the first support base for collimation adjustment of the two-lens optical system;
• (b) after the step (a), moving the second support base for beam steering of the two-lens optical system;
• (c) after the step (a) or (b), fixing the first lens to the first support base;
• and
• (d) after the step (b), fixing the second lens to the second support base.