Optical lens
AssigneeAbility Enterprise Co., Ltd.
InventorHuai-Yi Huang
Life of this patent
Estimating the term…
Abstract
An embodiment of this disclosure provides an optical lens, which includes, in order from an object side to an image-forming side, a first lens with negative refraction power; a second lens with negative refraction power; a third lens with positive refraction power; a fourth lens with positive refraction power; and a fifth lens with negative refraction power; wherein the second lens has an Abbe number vd2, the fifth lens has a refractive index nd5, and 20≤vd2≤30 and nd5≥1.9.
Claims20
An optical lens, in order from an object side to an image-forming side, consisting of:
- a first lens with negative refraction power, a second lens with negative refraction power, a third lens with refraction power, a fourth lens with positive refraction power and a fifth lens with negative refraction power, wherein the optical lens satisfies 20≤vd2≤30, a thickness of the third lens is larger than 3 mm and nd5≥1.9, wherein vd2 is an Abbe number of the second lens and nd5 is a refractive index of the fifth lens.
An optical lens, in order from an object side to an image-forming side, consisting of:
- a first lens with negative refraction power, a second lens with negative refraction power, a third lens with refraction power, a fourth lens with positive refraction power and a fifth lens with negative refraction power, wherein the second lens has an Abbe number vd2, the second lens has a refractive index nd2, the third lens has a refractive index nd3, 20≤vd2≤30, a thickness of the third lens is larger than 3 mm, and the optical lens satisfies at least one of the following two conditions:
- nd2≥1.6 and nd3≥1.8.
An optical lens, in order from an object side to an image-forming side, consisting of:
- a first lens with negative refraction power, a second lens with negative refraction power, a third lens with refraction power, a fourth lens with positive refraction power and a fifth lens with negative refraction power, wherein the second lens has an Abbe number vd2, 20≤vd2≤30, a thickness of the third lens is larger than 3 mm, the optical lens further satisfies the condition:
- Fno≤2.4, and Fno is an F-number of the optical lens.
An optical lens, in order from an object side to an image-forming side, consisting of:
- a first lens with negative refraction power, a second lens with negative refraction power, a third lens with refraction power, a fourth lens with positive refraction power and a fifth lens with negative refraction power, wherein the second lens has an Abbe number vd2, 20≤vd2≤30, a thickness of the third lens is larger than 3 mm, the optical lens further satisfies the condition:
- (2×ω)≥135°, ω is a half field of view of Y′max, and Y′max is a maximum of a half image height of the optical lens.
Dependencies are inferred from the claim text.