| 摘要 |
PURPOSE: A photographic lens having an extra aperture between a first lens and a second lens is provided to correct aberration and to implement clear image, thereby reducing flare. CONSTITUTION: A first lens(10) has positive refractive power and a convex shape outwards to an object. A second lens(20) has negative refractive power. An extra aperture is positioned between the first lens and second lens. A third lens(30) and a fourth lens(40) have positive refractive power and concave meniscus shapes towards the object. A fifth lens(50) has negative refractive power and a convex meniscus shape toward the object. A filter(60) blocks the radiant heat emitted from outside light not to be transferred to a light receiving element(70). The light receiving element(70) is an image sensor such as a CCD(Charge Coupled Device), CMOS(Complementary Metal Oxide Semiconductor), etc. |
