Receiving optical system, transmitting optical system, sensor system, and lidar device
AssigneeLG Innotek Co., Ltd.
InventorsJin Young KIM, Chang Hyuck LEE
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Abstract
An receiving optical system disclosed in an embodiment of the invention includes a first lens closest to an object side; an n-th lens closest to an image sensor (n is 6 or less); a plurality of lenses disposed between the first lens and the n-th lens and aligned in an optical axis; and an optical filter disposed in one of regions between the plurality of lenses, wherein an optical axis distance from the optical filter to a surface of the image sensor is D1, and an optical axis distance from a sensor-side surface of the n-th lens closest to the image sensor to the surface of the image sensor is BFL, and may satisfy the following Equation: BFL<D1.
Claims21
-15. (canceled)
A receiving optical system comprising:
- a first lens closest to an object;
- an n-th lens closest to an image sensor (n is 6 or less);
- a plurality of lenses arranged between the first lens and the n-th lens and aligned in an optical axis;
- and
- an optical filter disposed in one of regions between the plurality of lenses,
- wherein the first lens includes a convex object-side surface and a concave sensor-side surface on the optical axis,
- wherein an optical axis distance from the optical filter to a surface of the image sensor is D1,
- wherein an optical axis distance from a sensor-side surface of the n-th lens closest to the image sensor to the surface of the image sensor is BFL, and
- wherein the following Equation satisfies:
- BFL<D1.
A transmitting optical system comprises:
- a first lens closest to an object;
- an n-th lens closest to a light source (n is 6 or less);
- and
- a plurality of lenses arranged between the first lens and the n-th lens and aligned in the optical axis,
- wherein the first lens has a meniscus shape convex toward the object side,
- wherein the n-th lens has a shape in which both sides are convex on the optical axis,
- wherein an n−1th lens from the n-th lens to the object side has a shape in which both sides are convex on the optical axis,
- wherein the first lens is made of glass, and an object-side surface and a light source-side surface of the first lens on the optical axis are spherical,
- wherein the n-th lens is made of glass, and an object-side surface and the light source-side surface of the n-th lens on the optical axis are aspherical, and
- wherein a second lens disposed on a light source side of the first lens has a flat object-side surface on the optical axis.
A Lidar device comprising:
- a receiving optical system having an image sensor, and first to fifth lenses aligned along in a first optical axis from an object toward the image sensor;
- and
- a transmitting optical system having a light source and sixth to tenth lenses aligned in a second optical axis toward a light source side from the object,
- wherein the first to fifth lenses include a spherical lens and an aspherical lens,
- wherein the sixth to tenth lenses include a spherical lens and an aspherical lens,
- wherein the receiving optical system includes an optical filter arranged between the spherical lens and the aspherical lens,
- wherein each of the first lens and the sixth lens has a meniscus shape convex toward the object side,
- wherein an object-side surface of the second lens has a flat shape on the first optical axis,
- wherein an object-side surface and a sensor-side surface of the fifth lens has a convex shape and an aspherical shape on the first optical axis,
- wherein an object-side surface and a light source-side surface of the tenth lens has a convex shape and an aspherical shape on the second optical axis,
- wherein the light source generates light in a range of 890 nm to 960 nm, and
- wherein the optical filter transmits light in a range of 890 nm to 960 nm.
Dependencies are inferred from the claim text.