Photographing lens optical system
AssigneeAce Solutech Co., Ltd.
InventorsPil Sun JUNG, Dong Young KIM, Chi Ho AN
Life of this patent
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Abstract
Provided is a photographing lens optical system. The lens optical system includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially arranged from an object to an image sensor. The first lens may have a negative (−) refractive power and have an exit surface that is concave with respect to the image sensor. The lens optical system may satisfy at least one of a condition 100°<FOV<200° and a condition 1<TTL/ImgH<2. Herein, FOV denotes an angle of view of the lens optical system, TTL denotes a distance from an incidence surface of the first lens to the image sensor, and ImgH denotes a diagonal length of a maximum pixel region of the image sensor.
Claims20
A lens optical system comprising:
- a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially arranged in the stated order from an object to an image sensor where an image of the object is formed,
- wherein the first lens has a negative (−) refractive power and has an exit surface that is concave with respect to the image sensor, and
- the lens optical system satisfies all of the following conditions:
- 100°<FOV<200° Condition (1):
- 1<TTL/ImgH<2 Condition (2):
- where FOV denotes an angle of view of the lens optical system, TTL denotes a distance from an incidence surface of the first lens to the image sensor, and ImgH denotes a diagonal length of a maximum pixel region of the image sensor.
A lens optical system comprising:
- a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially arranged from an object to an image sensor where an image of the object is formed,
- wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens have a negative (−) refractive power, a positive (+) refractive power, a positive (+) refractive power, a positive (+) refractive power, and a negative (−) refractive power, respectively, and
- the first lens is an aspherical lens having an exit surface that is concave with respect to the image sensor, the second lens is an aspherical lens having an incidence surface that is convex toward the object, the third lens is an aspherical lens having an exit surface that is convex toward the image sensor, the fourth lens and the fifth lens are cemented together to form a cemented lens, the cemented lens has a positive (+) refractive power, and at least one of an incidence surface and an exit surface of the cemented lens is an aspherical surface.
Dependencies are inferred from the claim text.