| 摘要 |
A microminiature optical system using an aspherical lens is provided to reduce the number of lens sheets, to make the total length shorter, to secure the intensity of peripheral light, to prevent distortion, and to cut down the manufacturing cost. A microminiature optical system using an aspherical lens includes a first lens(L1) comprising a convex surface(2) facing an object and a convex upside(3) and having the positive refractive force, wherein both surfaces of the first lens are aspherical; a second lens(L2) formed like a meniscus having a recessed surface facing the object and provided with the negative refractive force, wherein both surfaces(4,5) of the second lens are aspherical; and a third lens(L3) having both aspherical surfaces(6,7) and the negative refractive force. The first, second, and third lenses are arranged in order from the object.
|
