US 2025/0060563 A1 · OPTICAL SYSTEM AND CAMERA MODULE COMPRISING SAME

Abstract

The optical system disclosed in the embodiment includes first to ninth lenses disposed along an optical axis from an object side toward a sensor side, wherein the first lens has positive (+) refractive power on the optical axis, the ninth lens has negative (−) refractive power on the optical axis, an object-side surface of the first lens has a convex shape on the optical axis, a sensor-side surface of the third lens has a smallest effective diameter among the first to ninth lenses, a sensor-side surface of the ninth lens has a largest effective diameter among the first to ninth lenses, a sensor-side surface of the ninth lens is provided without a critical point from the optical axis to an end of an effective region, a distance from a center of the sensor-side surface of the ninth lens to a first point where a slope of a tangent line passing through the sensor-side surface based on a straight line perpendicular to the optical axis is less than −1 degree is 15% or more of an effective radius, and the following equation satisfies: 0.4<TTL/ImgH<2.5 (TTL (Total track length) is a distance in the optical axis from an apex of the object-side surface of the first lens to an image surface of an image sensor, and ImgH is ½ of a maximum diagonal length of the image sensor.).

Claims23

Dependent claims

An optical system comprising:

first to ninth lenses disposed along an optical axis from an object side toward a sensor side,
wherein the first lens has positive refractive power on the optical axis,
wherein the ninth lens has negative refractive power on the optical axis,
wherein an object-side surface of the first lens has a convex shape on the optical axis,
wherein a sensor-side surface of the third lens has a smallest effective diameter among the first to ninth lenses,
wherein a sensor-side surface of the ninth lens has a largest effective diameter among the first to ninth lenses,
wherein the sensor-side surface of the ninth lens is provided without a critical point from the optical axis to an end of an effective region,
wherein a distance from a center of the sensor-side surface of the ninth lens to a first point where a slope of a tangent line passing through the sensor-side surface based on a straight line perpendicular to the optical axis is less than −1 degree is 15% or more of an effective radius, and
wherein the following equation satisfies:
0.4
<
T
⁢
T
⁢
L
/
ImgH
<
2
.
5
(TTL (Total track length) is a distance in the optical axis from an apex of the object-side surface of the first lens to an image surface of an image sensor, and ImgH is ½ of a maximum diagonal length of the image sensor.).

20 more elements

An optical system comprising:

a first lens group having three or less lenses on an object side;
and
a second lens group having six or less lenses on a sensor-side surface of the first lens group,
wherein the first lens group has positive (+) refractive power on the optical axis,
wherein the second lens group has negative (−) refractive power on the optical axis,
wherein a number of lenses of the second lens group is twice a number of lenses of the first lens group,
wherein a sensor-side surface closest to the second lens group among lens surfaces of the first lens group has a smallest effective diameter,
wherein a sensor-side surface closest to an image sensor among lens surfaces of the second lens group has a largest effective diameter,
wherein the sensor-side surface closest to the image sensor among the lens surfaces of the second lens group has a minimum distance between a center of the sensor-side surface and the image sensor, and the distance gradually increases toward an end of an effective region of the sensor-side surface, and
wherein the following equations may satisfy:
0.4
<
T
⁢
T
⁢
L
/
ImgH
<
3
⁢
0.5
<
TD
/
CA_max
<
1
.
5
(TTL (Total track length) is a distance in an optical axis from an apex of an object-side surface of the first lens group to an image surface of the image sensor, ImgH is ½ of a maximum diagonal length of the image sensor, TD is a maximum distance (mm) in the optical axis from an object-side surface of the first lens group to a sensor-side surface of the second lens group, and CA_max is a largest effective diameter of effective diameters of object-side and sensor-side surfaces of first to ninth lenses.).

29 more elements

Dependencies are inferred from the claim text.

Optical system and camera module comprising same

Life of this patent

Optical system and camera module comprising same

Life of this patent

Abstract

Claims23