| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily obtain a thin apodization filter in order to contribute to miniaturization, weight reduction and cost reduction of a camera lens, secure an optimized excellent blur effect, enable a multicolor blur effect, and avoid loss of the amount of light.SOLUTION: A dot pattern Pd formed by combining many dots d ... having a light transmissivity of at most 20% on a surface 2f of a flat transparent substrate 2 having a light transmissivity of at least 80% is used, and thereby a shading mask layer 3 is formed, which has such a light transmissivity characteristic that a light transmission amount is decreased gradually as the degree of separation to a radial direction Fr with respect to the optical axis center Cs is increased.</p> |
