| 摘要 |
An image projector (2, 2b, 2c) comprising, a light source (4) for providing a light beam (5); a MEMS mirror (6) which is arranged such that it can receive the light beam (5), and which can oscillate about at least one oscillation axis (7a, b) to scan said light beam (5); one or more multiple-beam-generators (8, 80, 41, 61, 62) each of the one or more multiple-beam-generators comprising, a planar beam splitter (9) which is arranged to receive the light beam (5) reflected by the MEMS mirror (6), and a planar reflector (10) which can receive the part of the light beam (5) which is transmitted through the planar beam splitter (9), so that each of the one or more multiple-beam-generators (8, 80, 41 ) can generated multiple beams (15a-c), and wherein the planar beam splitter (9) and planar reflector (10) are arranged to be in parallel; and a focusing lens (11) which is arranged to receive multiple beams (15a-c) which are generated by the one or more multiple-beam-generators (8, 80, 41, 61,62); wherein, in each of the one or more multiple-beam-generators (8, 80, 41, 61,62), the distance (h) between the planar beam splitter (9) and planar reflector (10) is such that the optical distance (OD) between the planar beam splitter (9) and planar reflector (10) is greater than, or equal to, half the coherent length of the light beam (5). There is further provided an optical assembly (1, 20, 30, 40, 60) comprising such an image projector. |
