Optical system and camera module comprising same
AssigneeLG Innotek Co., Ltd.
InventorsChang Gyun Son, Jun Young Lim
Life of this patent
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Abstract
The optical system disclosed in the embodiment includes first to third lenses disposed along an optical axis from an object side toward a sensor side, the optical system satisfies 40°≤FOV≤50°, an object-side surface and a sensor-side surface of the first lens are spherical, the first lens has a meniscus shape convex toward the object side, the first lens satisfies: 1.7≤nt_1≤2.3 and 0.15≤D_1/TTL≤0.3, TTL satisfies: ≤9 mm (nt_1 is the refractive index of the first lens, TTL is a distance in the optical axis from an object-side surface of the first lens to an image surface of the image sensor, D_1 is the thickness of the first lens at the optical axis, and FOV is the field of view of the optical system.).
Claims20
An optical system for an infrared camera comprising:
- first to third lenses disposed along an optical axis in a direction from an object side toward a sensor side,
- wherein an object-side surface and a sensor-side surface of the first lens are spherical,
- wherein the first lens has a meniscus shape convex toward the object side,
- wherein the third lens has positive (+) refractive power
- wherein an object-side surface of the third lens has a convex shape on the optical axis,
- wherein the first lens satisfies:
- 1.7≤nt_1≤2.3
- 0.15≤D1/TTL≤0.3
- wherein TTL satisfies:
- TTL≤9 mm
- (nt_1 is a refractive index of the first lens, TTL is a distance in the optical axis from the object-side surface of the first lens to an image surface of an image sensor, and D_1 is a thickness of the first lens at the optical axis).
An optical system for an infrared camera comprising:
- first to third lenses disposed along an optical axis from an object side toward a sensor side,
- wherein an object-side surface of the first lens has a convex shape on the optical axis,
- wherein a thickness of the second lens at the optical axis is greater than a thickness of the third lens at the optical axis,
- wherein an object-side surface of the third lens has a convex shape on the optical axis,
- wherein the third lens has positive (+) refractive power, and
- wherein the first lens and the third lens are made of different materials.
Dependencies are inferred from the claim text.