| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a high-performance image capturing lens which prevents stray light-induced optical defects such as flare and ghost images and offers compactness and sufficiently reduced aberrations.SOLUTION: A cemented compound lens is used, comprising a parallel plate glass having an object-side resin lens cemented on an object-side surface thereof and an image-side resin lens cemented on an image-side surface thereof, where the resin lenses are made of an energy curable resin. By appropriately controlling differences in refractive indexes and Abbe numbers of the resin and the glass, interfacial reflection of a light beam entering at a large incident angle is suppressed, which suppresses flare and ghost images. Further, by appropriately controlling the refractive index difference and Abbe number difference, aberrations that deteriorate optical performance, such as spherical aberration, field curvature, and chromatic aberration, are corrected.</p> |
