Imaging lens and imaging apparatus
AssigneeFUJIFILM Corporation
InventorTaro ASAMI
Life of this patent
Estimating the term…
Abstract
An imaging lens is provided and includes: in order from the object side, a first lens having a concave surface on an image side thereof; a second lens of a negative lens having a concave surface on the image side and having at least one aspheric surface; a third lens having at least one aspheric surface; and a fourth lens of a positive lens having a convex surface on the image side and having at least one aspheric surface. A stop is disposed between the third lens and the fourth lens. In addition, assuming that a focal length of the whole system is f and a focal length of the first lens L1 is f1, the following Conditional Expression (1) is satisfied. 15.0<|f1/f| (1)
Claims11
An imaging lens comprising:
- in order from an object side thereof,
- a first lens having a concave surface on an image side thereof;
- a second lens of a negative lens having a concave surface on the image side and having at least one aspheric surface;
- a third lens having at least one aspheric surface;
- a stop;
- a fourth lens of a positive lens having a convex surface on the image side and having at least one aspheric surface,
- wherein the following Conditional Expression (1) is satisfied:
- 15.0<|f1/f1 (1)
- wherein f represents a focal length of the imaging lens, and f1 represents a focal length of the first lens.
Dependencies are inferred from the claim text.