| 摘要 |
A large aperture lens comprises a power component and correcting one, those are arranged along the ray path. The power component comprises a positive lens, negative lens and positive single meniscus oriented by concave face towards the image domain. The correcting component comprises a positive single meniscus oriented by concave face towards the image domain and negative lens. The positive lens of the power component is made as a single double-convex one, the negative lens of the power component is made as a single double-convex one, and negative lens of the correcting component is made as a single meniscus oriented by concave face towards the image domain. The distance between negative lens and positive single meniscus of the power component is less than 0.01 of lens focal distance. The correcting component is complemented with positive and negative single menisci oriented by concave faces towards the image domain, and the sum of focal powers of power and correcting components exceeds 0.016 mm. |
