Optical lens system and time of flight sensing module
AssigneeLargan Precision Co., Ltd.
InventorsChun-Che Hsueh, Jin Sen Wang, Hsin-Hsuan Huang, Fuh-Shyang Yang
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Abstract
An optical lens system includes two lens elements which are, in order from an object side to an image side along an optical path: a first lens element and a second lens element. Each of the two lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one of the object-side surface and the image-side surface of at least one lens element of the optical lens system is aspheric. A total number of the lens elements in the optical lens system is two.
Claims20
An optical lens system comprising two lens elements, the two lens elements being, in order from an object side to an image side along an optical path, a first lens element and a second lens element, and each of the two lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side;
- wherein the image-side surface of the second lens element is concave in a paraxial region thereof and has at least one inflection point, at least one of the object-side surface and the image-side surface of at least one lens element of the optical lens system is aspheric, and a total number of the lens elements in the optical lens system is two;
- wherein an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, an Abbe number of the i-th lens element is Vi, a refractive index of the first lens element is N1, a refractive index of the second lens element is N2, a refractive index of the i-th lens element is Ni, a minimum value of Vi/Ni is (Vi/Ni)min, an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum field of view of the optical lens system is FOV, a relative illumination on an image periphery of the optical lens system is RI, and the following conditions are satisfied:
- 10.0<V1+V2<50.0;
- (Vi/Ni)min<13.0, wherein i=1 or 2;
- 0.10 [mm]<TL<3.0 [mm];
- 60 [deg.]<FOV<110 [deg.];
- and
- 50%<RI.
An optical lens system comprising two lens elements, the two lens elements being, in order from an object side to an image side along an optical path, a first lens element and a second lens element, and each of the two lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side;
- wherein the object-side surface of the first lens element is convex in a paraxial region thereof, at least one of the object-side surface and the image-side surface of at least one lens element of the optical lens system is aspheric, and a total number of the lens elements in the optical lens system is two;
- wherein the optical lens system further comprises an aperture stop, an Abbe number of the first lens element is Vi, an Abbe number of the second lens element is V2, an Abbe number of the i-th lens element is Vi, a refractive index of the first lens element is N1, a refractive index of the second lens element is N2, a refractive index of the i-th lens element is Ni, a minimum value of Vi/Ni is (Vi/Ni)min, an axial distance between the aperture stop and the image-side surface of the second lens element is SD, an axial distance between the object-side surface of the first lens element and the image-side surface of the second lens element is TD, an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum field of view of the optical lens system is FOV, a relative illumination on an image periphery of the optical lens system is RI, and the following conditions are satisfied:
- 10.0<V1+V2<50.0;
- (Vi/Ni)min<13.0, wherein i=1 or 2;
- 0.75<SD/TD<1.20;
- 0.10 [mm]<TL<3.0 [mm];
- 60 [deg.]<FOV<110 [deg.];
- and
- 50%<RI.
Dependencies are inferred from the claim text.