| 摘要 |
<p>A lens unit (U15) comprises a housing (45), upper and lower lens arrays (A1', A2'), and first and second prisms (4A, 4B). Each of the lens arrays includes a plurality of lenses (2) formed integrally, an optical shield (4), and a plurality of positioning projections (12). Light passing downward through a first slit (45c) formed in an upper part of the housing (45) into the housing (45) is directed upward by the first prism (4A) and allowed to pass between the two lens arrays (A1', A2'). The light is directed downward by the second prism (4B), and it exits through a second slit (45d) formed in a lower part of the housing (45).</p> |
