Abstract:
A projector assembly includes three coaxially aligned lenses and an aperture stop. The three coaxially aligned lenses include a first lens and, in order of increasing distance therefrom and on a same side thereof, a second lens and a positive meniscus lens. The first lens is a positive lens. The second lens is a negative lens. The second lens is located between the aperture stop and the positive meniscus lens. The projector assembly is one-sided telecentric at a plane proximate the positive meniscus lens.
Abstract:
A three-surface wafer-level lens system for imaging a wide field-of-view scene onto an image plane includes (a) a first wafer-level lens with (i) a first substrate having a first planar surface facing the image plane, and (ii) a first lens element bonded to the first planar surface and having a first lens surface facing the image plane, and (b) a second wafer-level lens with (i) a second substrate having a second planar surface facing away from the image plane, (ii) a third substrate bonded to the second substrate and having a third planar surface facing the image plane, (iii) a second lens element bonded to the second planar surface and having a second lens surface facing away from the image plane, and (iv) a third lens element bonded to the third planar surface and having a third lens surface facing the image plane.
Abstract:
An optical zoom imaging system includes (1) first and second image sensors disposed on a common substrate, and (2) first and second optical blocks in optical communication with the first and second image sensors, respectively. The first and second optical blocks have different respective magnifications. An array includes a plurality of the optical zoom imaging systems. A method for imaging a scene includes the following steps: (1) generating first image data representing the scene at a first zoom level using a first optical block in optical communication with a first image sensor, (2) generating second image data representing the scene at a second zoom level using a second optical block in optical communication with a second image sensor, the second zoom level being different from the first zoom level, and (3) selecting between the first image data and the second image data based on a desired zoom level.
Abstract:
A low-height projector assembly includes a biconvex lens, a converging lens, an aperture stop, and a beam-steerer between the biconvex lens and the converging lens. The biconvex lens has a principal plane, a focal length, and a first optical axis. The converging lens has a second optical axis laterally offset from the first. The beam-steerer is configured to steer light from the biconvex lens to the converging lens. An aperture-stop plane intersects the second optical axis and the aperture stop. On the second optical axis, at least one of a front surface and a back surface of the converging lens is between the aperture-stop plane and the beam-steerer. The axial chief ray's propagation distance from the principal plane to the aperture stop differs from the focal length by less than half the depth of focus of the biconvex lens.
Abstract:
A near-infrared hybrid lens system for imaging a wide field-of-view scene onto an image plane includes (a) a first cast lens positioned closest to the scene and at least partly transmissive to near-infrared light, (b) a second cast lens positioned closest to the image plane and at least partly transmissive to near-infrared light, and (c) a wafer-level lens at least partly transmissive to near-infrared light and disposed between the first cast lens and the second cast lens, wherein the wafer-level lens has (i) a planar substrate with a first surface facing away from the image plane and a second surface facing the image plane, (ii) a first lens element disposed on the first surface, and (iii) a second lens element disposed on the second surface.
Abstract:
A low-profile hybrid lens system, for imaging a scene onto an image plane, includes (a) a wafer-level lens with (i) a planar substrate having opposing first and second surfaces, (ii) a first lens element of a first material and disposed on the first surface, and (iii) a second lens element of a second material and disposed on the second surface; (b) a first cast lens; and (c) a second cast lens; wherein the wafer-level lens, the first cast lens, and the second cast lens are optically coupled in series. A method for manufacturing a low-profile hybrid lens system includes mounting a wafer-level lens, a first cast lens, and a second cast lens in a fixture to optically couple, in series, the wafer-level lens and the first and second cast lenses.
Abstract:
A bimodal zoom lens includes three coaxially aligned lenses including a first lens, a third lens, and a second lens therebetween. The first lens is a negative lens, each of the second lens and the third lens is a positive lens. The three coaxially aligned lenses form (i) a first configuration when the second lens and the first lens are separated by an axial distance L11 and (ii) a second configuration when the second lens and the first lens are separated by an axial distance L12, which exceeds axial distance L11. The second configuration has a second effective focal length that exceeds a first effective focal length of the first configuration.
Abstract:
A four-element athermal lens includes four coaxially aligned lenses including a (i) first lens and, in order of increasing distance therefrom and on a same side thereof, (ii) a second lens, a third lens, and a fourth lens. The first lens and the second lens are positive lenses. The third and fourth lenses are negative lenses. The first lens, second lens, third lens, and fourth lens have equal respective refractive indices n1, n2, n3, and n4. A difference between (i) the maximum of n1, n2, n3, and n4 and (ii) the minimum of n1, n2, n3, and n4 being less than 0.05 in a free-space wavelength range. Refractive indices n1, n2, n3, and n4 have respective temperature dependences Δ n 1 Δ T , Δ n 2 Δ T , Δ n 3 Δ T , Δ n 4 Δ T . Each of Δ n 1 Δ T and Δ n 2 Δ T exceeds, in the free-space wavelength range, each of Δ n 3 Δ T and Δ n 4 Δ T by a factor between 2.05 and 2.85, inclusive.
Abstract:
A near-infrared hybrid lens system for imaging a wide field-of-view scene onto an image plane includes (a) a first cast lens positioned closest to the scene and at least partly transmissive to near-infrared light, (b) a second cast lens positioned closest to the image plane and at least partly transmissive to near-infrared light, and (c) a wafer-level lens at least partly transmissive to near-infrared light and disposed between the first cast lens and the second cast lens, wherein the wafer-level lens has (i) a planar substrate with a first surface facing away from the image plane and a second surface facing the image plane, (ii) a first lens element disposed on the first surface, and (iii) a second lens element disposed on the second surface.
Abstract:
An optical zoom imaging system includes (1) first and second image sensors disposed on a common substrate, and (2) first and second optical blocks in optical communication with the first and second image sensors, respectively. The first and second optical blocks have different respective magnifications. An array includes a plurality of the optical zoom imaging systems. A method for imaging a scene includes the following steps: (1) generating first image data representing the scene at a first zoom level using a first optical block in optical communication with a first image sensor, (2) generating second image data representing the scene at a second zoom level using a second optical block in optical communication with a second image sensor, the second zoom level being different from the first zoom level, and (3) selecting between the first image data and the second image data based on a desired zoom level.